Condition Analysis
AI-powered assessment using site data and 14-day weather history
The rock has received repeated light-to-moderate rainfall over the past week (3.5mm on Apr 11, 1.0mm on Apr 12, and 1.2mm forecast today), with no consecutive dry days established. Despite Kyloe Out's exposed SW aspect aiding drying, the cumulative moisture loading from frequent showers means the porous Fell Sandstone is very likely still holding internal moisture and should not be climbed today.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated buttresses (Saints Wall, Space Buttress, Central Wall) are fully exposed to wind from the prevailing SW/W directions, which is a significant advantage for surface drying compared to the sheltered Kyloe-in-the-Woods.
- The open moorland setting means no tree canopy to trap humidity, but the base of the buttresses can retain ground moisture — check the soil at the crag foot as a field indicator of internal rock dampness.
- The scattered buttress layout means some faces may be more sheltered than others; Central Wall sections with less direct wind exposure will dry more slowly than fully exposed faces.
- Spring conditions in Northumberland at this altitude can be deceptive — the rock may feel surface-dry in afternoon sun but the 28.7mm accumulated over the past 28 days represents significant cumulative moisture loading for Fell Sandstone.
Warnings
2
- Climbing on wet or internally damp Fell Sandstone causes permanent, irreversible damage to holds — the NMC ethic of 'Love the rocks' places rock conservation above all else.
- The surface of the sandstone may appear dry in afternoon sunshine while the interior remains saturated — this is the most dangerous scenario for both hold breakage and climber safety.
Reasoning
With 1.0mm on Apr 12, 1.2mm today (Apr 13), and 3.5mm as recently as Apr 11, the rock has had no meaningful dry period and is almost certainly retaining internal moisture despite any surface drying.
The SW-facing, exposed aspect and moderate winds (19–30 km/h) aid surface evaporation, but with rain falling on three of the last three days and temperatures only around 9–11°C, full drying through the porous sandstone matrix has not been achieved.
The cumulative 6.5mm over the past 7 days across multiple wetting events means the sandstone has been repeatedly re-saturated before fully drying, elevating the risk of hold breakage and grain loosening — the 10–50% compressive strength reduction applies.
Early April in Northumberland is transitional; while daytime temperatures are reaching double figures, overnight lows near 1–2°C slow drying significantly, and the 28.7mm monthly rainfall total reflects the typically unsettled spring pattern.
Contributing Factors
7
Rain fell on Apr 11 (3.5mm), Apr 12 (1.0mm), and today Apr 13 (1.2mm), meaning zero consecutive fully dry days have been established.
The open, wind-exposed SW-facing buttresses receive good solar radiation and consistent wind, providing above-average drying potential when dry weather arrives.
Winds of 19–30 km/h from S/SW over recent days help move moist air from the rock surface and accelerate evaporation.
The 28.7mm over 28 days across numerous wetting events means the sandstone has been repeatedly re-wetted before fully drying, maintaining elevated internal moisture levels.
Average temperatures around 8.5°C over the past week with overnight lows dropping to 1–2°C significantly slow evaporation rates through the rock matrix.
Average humidity around 69% is neither very high nor very low — it allows some drying but is not ideal for rapid evaporation.
The 1.2mm forecast for today resets the drying clock, re-wetting at least the surface layer of the already moisture-laden sandstone.
Recommendations
3
- Do not climb today — the rock has had no consecutive dry days and the Fell Sandstone will be holding internal moisture despite any surface drying.
- Wait for at least 2 full dry days (ideally 3) with wind and temperatures above 10°C before visiting; the earliest realistic window may be Apr 16–17 if the forecast holds.
- On arrival after a dry spell, check the soil at the base of the buttresses — if the ground is damp rather than sandy-dry, the rock is almost certainly still wet internally.
Previous Analyses
Do Not Climb
70%
1 days ago
Rain today (1.5mm) and yesterday (3.5mm) means the rock has had zero consecutive dry days. Despite Kyloe Out's exposed, SW-facing aspect offering good drying potential, the Fell Sandstone needs at least 2–3 dry days after rain, and there is no dry window to count from — conditions are unsuitable today.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated buttresses (Saints Wall, Space Buttress, Central Wall) are fully exposed to wind and sun on their SW faces, giving meaningfully faster drying than its sheltered woodland neighbour Kyloe-in-the-Woods, but the scattered layout means some faces will be sheltered from the prevailing wind.
- The base areas around these low sandstone buttresses can retain ground moisture, and the practical field test — checking if the ground at the base is still moist — is particularly relevant here on open fell ground after the recent wet spell.
- The recent pattern shows repeated light-to-moderate rain events (6.1mm on Apr 3, 4.6mm on Apr 1, 3.5mm on Apr 11, 1.5mm today) with never more than 2–3 dry days between them, meaning the rock has had little chance to dry out internally despite surface appearances.
- Access is permissive via farmer agreement — climbing on visibly damp rock or during marginal conditions risks both the rock and the goodwill that maintains access; park carefully on the verge at NU 035 399 and do not block the farm gate.
Warnings
2
- Fell Sandstone loses significant strength at only ~1% saturation — the rock may look dry on the surface while remaining dangerously weak internally after this prolonged wet pattern.
- Climbing on damp sandstone causes permanent, irreversible damage to holds and routes; access at Kyloe Out is permissive and depends on responsible use.
Reasoning
With 3.5mm yesterday and 1.5mm today, plus a cumulative 28.5mm over the last 28 days with frequent wetting events, the rock is almost certainly holding significant internal moisture despite any surface drying between showers.
Zero consecutive dry days means no meaningful drying period has begun; although the SW aspect and exposed position with 33.5 km/h winds today aid surface evaporation, Fell Sandstone's capillary absorption means internal moisture persists well beyond surface drying.
With repeated wetting over recent weeks and no sustained dry spell, the sandstone is likely at elevated moisture content internally, increasing the risk of hold breakage and grain loosening — significant weakening begins at only ~1% saturation.
Early April in Northumberland brings cool temperatures (avg 8.6°C last 7 days) and moderate humidity (69%), which slow drying; overnight lows near or just above freezing (min -0.3°C on Mar 26, 0.9°C on Apr 2) raise some residual freeze-thaw concern for moisture-laden rock.
Contributing Factors
6
3.5mm fell on April 11 and 1.5mm today, giving zero consecutive dry days and ensuring the rock surface and interior are freshly wetted.
The last 28 days have seen 28.5mm spread across many events with no dry spell longer than 3 days, keeping the sandstone's internal moisture elevated throughout.
The fully exposed, SW-facing buttresses receive direct afternoon sun and strong prevailing winds (33.5 km/h today), which will accelerate surface drying once rain stops.
Average temperatures of 8.6°C over the last week are adequate but not warm, slowing evaporative drying compared to summer conditions.
Humidity at 69% average is moderate — not ideal for drying but not prohibitive either, allowing some evaporative drying when combined with wind.
Overnight lows are mostly above 2°C now but recent nights near freezing with wet rock raise a small residual concern for cumulative freeze-thaw damage earlier in the period.
Recommendations
3
- Do not climb today — wait for at least 2 full dry days with wind and temperatures above 10°C before visiting.
- Check the ground at the base of the buttresses on arrival; if the soil or sandy ground feels moist, the rock interior is almost certainly still wet.
- Monitor the forecast closely — if April 14 stays dry and conditions after the April 15 rain clear quickly, late April may offer a better window.
Do Not Climb
90%
2 days ago
Kyloe Out received 4.5mm of rain today with no dry days accumulated, following a week of intermittent showers totalling 6.7mm. The porous Fell Sandstone will be saturated and needs at least 2–3 dry days to recover, which are not forecast.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated buttresses (Saints Wall, Space Buttress, Central Wall) are fully exposed to today's rain with no tree canopy shelter, meaning all faces will have received direct wetting.
- The SW aspect and exposed position normally aid drying, but the wind is from the S today, which still hits the face — this helps future drying but cannot offset same-day rainfall of 4.5mm.
- The iron oxide deposits that form the small holds on Fell Sandstone are especially vulnerable to grain loosening when saturated — climbing today risks permanent hold breakage on these low-lying buttresses.
- Access is permissive via agreement with the farmer; climbing on visibly wet rock risks undermining the community's reputation and could jeopardise continued access.
Warnings
3
- Fell Sandstone loses up to 50% of its compressive strength when wet — climbing today risks breaking holds and permanently damaging routes.
- The rock surface may appear dry before the interior has dried; always check that the ground at the base of the buttresses is completely sandy-dry before climbing.
- Heavy rain (13.8mm) is forecast for April 15th, which will reset drying progress — any window around April 14th will be narrow at best.
Reasoning
With 4.5mm falling today on top of 1.4mm two days ago and scattered showers throughout the past week, the rock is almost certainly saturated through its porous structure — internal moisture will be well above the critical 1% threshold where significant weakening begins.
Zero consecutive dry days have accumulated; despite moderate winds (28 km/h) and the SW aspect, drying cannot begin meaningfully until precipitation stops, and further rain is forecast tomorrow (1.8mm) and the day after (0.6mm).
At current saturation levels, compressive strength is likely reduced by 30%+ (Bell, 1978), creating serious risk of hold breakage and irreversible damage to the iron oxide features that define the climbing.
Early April in Northumberland brings unpredictable weather with cool temperatures averaging only 8°C over the past week; while freeze-thaw risk is diminishing, overnight lows near 0°C earlier this week mean residual frost damage concerns remain for recently wetted rock.
Contributing Factors
6
4.5mm of rain today means the rock is actively wet with zero drying time accumulated.
The past week has seen repeated small rain events (6.7mm total) preventing the rock from ever fully drying out.
With zero consecutive dry days and the 2–3 dry day minimum required for Fell Sandstone, conditions are clearly insufficient.
The open, exposed setting with SW aspect and strong winds will accelerate drying once rain stops, but this advantage cannot be realised today.
Temperatures around 10°C are adequate for some evaporation but not warm enough to drive rapid drying of deeply saturated sandstone.
Tomorrow brings 1.8mm and further rain on the 13th and 15th (13.8mm), preventing any sustained drying window in the coming days.
Recommendations
3
- Do not climb today — the rock is actively wet and structurally compromised; any climbing risks permanent hold damage.
- Monitor conditions for a potential brief window on April 14th, but only if the forecast holds dry and you can verify the rock is dry on arrival by checking the base of the buttresses.
- Consider visiting the nearby Bowden Doors or Kyloe-in-the-Woods pages for comparative conditions, though all Fell Sandstone venues will be affected similarly.
Marginal — Assess Conditions
60%
3 days ago
Only one full dry day has elapsed since light rain (0.8mm) on April 9th, following a wetter period earlier in the week (6.1mm on April 3rd, 2.4mm on April 4th, 1.4mm on April 5th). The exposed SW aspect and decent wind today are helpful, but with just one dry day and the lingering effects of a damp spring period, on-site assessment is essential before committing to climb.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated open buttresses (Saints Wall, Space Buttress, Central Wall) are fully exposed to the prevailing SW wind, which significantly aids drying compared to the sheltered woodland neighbour Kyloe-in-the-Woods.
- The separated buttress layout means some faces will catch direct sun and wind better than others — Central Wall sections with northerly aspects or recessed features will lag behind the main SW-facing surfaces.
- Iron oxide deposits forming the small holds are particularly vulnerable to granular disintegration when damp; even if surfaces feel dry, test holds carefully before committing to harder moves.
- Access is permissive via farmer agreement — climbing on visibly damp rock risks reputational damage to the climbing community and potential access withdrawal; err on the side of caution.
Warnings
2
- Only one dry day has elapsed since yesterday's rain on top of a wet early-April period — the rock may appear surface-dry while retaining significant internal moisture; test holds carefully and back off if anything feels gritty or soft.
- Heavy rain (6.2mm) is forecast for tomorrow, so conditions will deteriorate sharply; do not plan multi-day trips without checking updated forecasts.
Reasoning
The 0.8mm on April 9th was light, but it fell on rock that had received 4.6mm on April 1st, 6.1mm on April 3rd, 2.4mm on April 4th, and 1.4mm on April 5th — meaning the sandstone's internal moisture levels were already elevated before yesterday's shower.
One full dry day with moderate SW wind (30.6 km/h) and low humidity (65%) on an exposed SW-facing crag provides good surface drying conditions, but the 2–3 dry day guideline for Fell Sandstone after recent rain has not been met, especially given the cumulative moisture from early April.
Cumulative rainfall of ~15mm over the past 10 days means internal pore saturation could still be significant; the fine-grained iron oxide holds are at moderate risk of granular failure if moisture persists internally.
Early spring conditions with average temperatures around 8–9°C provide only moderate evaporative potential; overnight lows near 3°C slow drying, though freeze-thaw risk is minimal at these temperatures.
Contributing Factors
6
0.8mm fell on April 9th, leaving only one full dry day before today — below the recommended 2–3 dry day minimum for Fell Sandstone.
A cluster of rain events (6.1mm, 2.4mm, 1.4mm on April 3–5, plus 4.6mm on April 1) means the rock entered this week with elevated internal moisture.
Today's 30.6 km/h SW wind directly hits the main faces and the exposed hilltop setting maximises airflow, substantially accelerating surface and near-surface drying.
Humidity of 65% is favourable for evaporation and represents the lowest reading in several days.
A max of 9°C provides limited but adequate thermal energy for drying; not warm enough to drive rapid evaporation of deeper moisture.
6.2mm forecast for April 11th means today may be the only climbing window before another multi-day wet spell, but this should not rush the decision.
Recommendations
3
- Visit the crag and perform a thorough tactile and visual check — if the ground at the base of the buttresses is still damp or the rock feels cool and clammy to the touch, do not climb.
- If conditions pass inspection, favour the most exposed upper sections of SW-facing buttresses (e.g. Space Buttress, Saints Wall) where wind and sun exposure is greatest, and avoid any recessed or shaded features.
- Be prepared to walk away — with rain forecast from tomorrow through April 13th, the next reliable window may not arrive until April 15th at the earliest; do not force today's session if conditions are marginal.
Do Not Climb
55%
5 days ago
Today (April 9) has received 1.3mm of rain, resetting the drying clock after only three dry days following a wet early-April period that deposited over 14mm in the preceding week. The rock is very likely still holding internal moisture and conditions are not suitable for climbing today.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated open buttresses (Saints Wall, Space Buttress, Central Wall) benefit from excellent wind exposure on all sides, making it one of the faster-drying Fell Sandstone venues — but the repeated light rain events through late March and early April have kept the rock in a near-continuous state of partial saturation.
- The SW aspect receives good afternoon solar radiation in spring, but with 100% cloud cover through much of the last 24 hours and today's rain, solar drying contribution has been minimal.
- The exposed hilltop setting means wind is the primary drying driver here; the strong SW winds (31 km/h today) will help, but 1.3mm of fresh rain today means the drying clock has effectively reset.
- Access is permissive via agreement with the local farmer — climbing on damp rock risks both permanent damage to the soft Fell Sandstone and jeopardising this access arrangement.
Warnings
2
- Do not climb today — fresh rain on already moisture-laden Fell Sandstone creates serious risk of irreversible hold breakage and route damage.
- The rock surface may appear dry before the interior has adequately dried; always apply the base-of-crag ground moisture test before committing to climb.
Reasoning
The rock received 1.3mm of rain today, 1.4mm on April 5, 2.4mm on April 4, 6.1mm on April 3, and 4.6mm on April 1 — a cumulative 16mm in the last 9 days with only brief dry spells between, meaning internal moisture levels are likely elevated despite the surface potentially drying between showers.
The three dry days (April 6–8) with warm temperatures up to 18.7°C and moderate SW winds would have dried the surface well, but today's 1.3mm rain has re-wetted the surface and the underlying rock never fully dried from the earlier heavier events.
With repeated wetting-drying cycles and the rock likely above 1% saturation internally, there is a meaningful risk of hold breakage on the small iron-oxide cemented features that characterise Fell Sandstone routes.
Early spring conditions with average temperatures around 8°C over the past week provide only moderate drying capacity, and overnight lows near 0°C on March 26 introduced a brief freeze-thaw risk on already-damp rock.
Contributing Factors
6
1.3mm of precipitation today has re-wetted the rock surface and reset the drying clock after just three dry days.
Over 14mm fell between April 1–5 with only short dry intervals, meaning the rock never fully dried before today's rain.
Strong SW winds at 31 km/h today and forecast to continue will significantly accelerate surface drying once rain stops.
Three dry days reaching 18.7°C with SW winds provided good drying conditions, likely removing surface moisture before today's re-wetting.
Humidity at 77% today is not extreme but is high enough to slow evaporative drying somewhat.
Average temperatures of only 8°C over the past week and a wet late March–early April period mean background moisture levels in the rock remain elevated.
Recommendations
3
- Wait at least 2 full dry days after today's rain before visiting — the earliest reasonable window would be April 11 if tomorrow stays dry, but check for the forecast 0.3mm on April 11.
- If visiting later this week, perform a ground-moisture test at the crag base: if the soil or sand beneath the buttresses is damp, the rock is certainly still wet internally.
- Consider Kyloe Out over Kyloe-in-the-Woods when conditions improve, as its exposed open aspect dries significantly faster than the sheltered woodland crag.
Marginal — Assess Conditions
60%
6 days ago
After two fully dry days (April 6–7) with decent temperatures and moderate wind following light rain on April 5 (1.4mm), the exposed SW-facing rock at Kyloe Out has had reasonable drying conditions, but today's trace precipitation (0.3mm) and the broader pattern of frequent light showers over the past week introduce uncertainty. A visual check on arrival is essential before committing to climb.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated buttresses (Saints Wall, Space Buttress, Central Wall) are fully exposed to wind from the prevailing SW/W direction, which significantly aids drying compared to its sheltered woodland neighbour Kyloe-in-the-Woods.
- The SW aspect receives good afternoon solar radiation in April, but early-season sun angles and the relatively short days mean total solar input is still moderate — base sections and north-facing sides of individual buttresses will lag behind.
- The crag has experienced 40mm of rain over the past 28 days with frequent small wetting events (April 1: 4.6mm, April 3: 6.1mm, April 4: 2.4mm, April 5: 1.4mm), meaning the rock has been repeatedly re-wetted and deep pore saturation may persist despite surface drying.
- Access is via permissive agreement with the farmer — climbing on damp rock risks both permanent sandstone damage and jeopardising this access arrangement; err on the side of caution.
Warnings
2
- Fell Sandstone loses significant strength at very low moisture levels — even rock that looks and feels dry on the surface can be dangerously weakened internally after repeated recent wetting.
- Overnight frost is possible with minima near 0°C (March 26 reached -0.3°C); if the rock retains internal moisture, freeze-thaw cycling poses an additional structural damage risk.
Reasoning
The last significant rain was April 5 (1.4mm) followed by two dry days plus today's trace 0.3mm; surface moisture should have largely evaporated from exposed faces, but internal pore moisture from the cumulative 10.5mm over the past week may persist in lower and sheltered sections.
Two full dry days with SW-facing aspect, moderate wind (20–27 km/h), and warm temperatures (12–14°C) provide decent but not exceptional drying; the exposed position is the strongest drying factor, though today's trace rain and 74% humidity slow progress.
With repeated wetting events through late March and early April and only short drying windows between them, the Fell Sandstone pores may retain significant internal moisture, posing a moderate risk of grain loosening and hold breakage particularly on lower sections.
Early April in Northumberland offers improving but still marginal drying conditions — day length is increasing but temperatures remain modest (avg 7.4°C last week), and the winter moisture legacy means deep rock saturation can persist well into spring.
Contributing Factors
7
Frequent light-to-moderate showers over the past 10 days (10.5mm in 7 days) with only short dry windows mean the rock has been repeatedly re-saturated without adequate continuous drying time.
April 6 and 7 were fully dry with reasonable temperatures (12–14°C) and moderate wind, providing roughly 48 hours of uninterrupted drying for the exposed surfaces.
Today's 0.3mm is negligible but confirms the unsettled pattern continues and may re-dampen the very surface layer that was drying.
The fully exposed position with prevailing SW/W winds and SW-facing rock provides the best possible natural drying conditions for a Fell Sandstone crag.
Temperatures around 7–14°C and humidity averaging 72% over the past week provide modest evaporative potential — not poor, but not the warm, dry conditions that would give full confidence.
40mm over the past 28 days in early spring means deep pore saturation is likely still elevated, even where the surface appears dry.
Sustained winds of 20–60 km/h throughout the past week significantly accelerate surface evaporation and are the single most favourable drying factor at this site.
Recommendations
3
- Visually inspect the rock surface and check the ground at the base of each buttress — if the soil is damp rather than sandy-dry, the rock interior is likely still holding moisture.
- Focus on the upper and most exposed sections of the buttresses which will have dried fastest; avoid lower walls, cracks that channel seepage, and any north-facing sides of the blocks.
- If conditions look marginal, wait — the forecast shows another dry day on April 10 which, combined with strong winds (36 km/h), could provide a better window after the expected rain on April 9.
Do Not Climb
45%
8 days ago
Despite one dry day today following 1.4mm on April 5th, the preceding week has seen repeated light-to-moderate rain events (14.8mm over 7 days) that will have kept the porous Fell Sandstone in a semi-saturated state. With only ~24 hours of drying since the last rain and cool spring temperatures averaging 7°C, the rock is very likely still holding significant internal moisture despite the exposed SW aspect and moderate winds.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated open buttresses (Saints Wall, Space Buttress, Central Wall) benefit from all-round wind exposure, giving it a genuine drying advantage over the sheltered Kyloe-in-the-Woods, but the repeated rain cycle this past fortnight has negated much of that benefit.
- The SW aspect means the crag receives afternoon sun which helps surface drying, but base sections of these relatively small buttresses tend to wick moisture upward from saturated ground — check for damp patches at crag base level.
- The exposed hilltop setting at 105m means strong westerly winds (30–60 km/h in recent days) have been driving rain directly onto the SW-facing rock surfaces, potentially increasing saturation depth compared to sheltered crags.
- Access is by permissive agreement with the farmer — climbing on damp rock risks both permanent damage to these soft sandstone buttresses and jeopardising the access arrangement; the NMC ethic of 'Love the rocks' applies directly here.
Warnings
3
- Fell Sandstone loses up to 50% of its compressive strength when wet — hold breakage is a real and permanent risk even if the surface appears dry.
- The overnight temperature dropped to 0.3°C; any moisture-laden rock may have experienced freeze-thaw stress, further weakening holds.
- Climbing on damp rock at Kyloe Out risks both personal injury and damage to the permissive access agreement with the landowner.
Reasoning
The rock has had only ~24 hours of dry weather since 1.4mm of rain on April 5th, and the preceding two weeks have seen frequent rain events (6.1mm on Apr 3, 2.4mm on Apr 4, 4.6mm on Apr 1, 3.3mm on Mar 24), meaning the sandstone has had virtually no opportunity to fully dry out and is very likely retaining significant internal moisture.
Today's conditions — 12.5°C max, 68% humidity, moderate 18 km/h SW wind, and SW aspect providing afternoon sun — are reasonable for surface drying, but a single day of these conditions is insufficient to dry porous Fell Sandstone that has been repeatedly wetted over the past two weeks.
With only one dry day and the rock likely still holding well above 1% saturation internally, the risk of grain loosening and hold breakage on these iron oxide-cemented holds is significant, particularly on the small crimps and friction-dependent moves typical of Fell Sandstone.
Early April in Northumberland brings cool temperatures (averaging 7°C over the past week) and relatively short solar exposure periods, both of which slow drying considerably; the overnight frost on April 6th (min 0.3°C) could also have caused minor freeze-thaw stress on any moisture-laden rock.
Contributing Factors
7
14.8mm over the past 7 days across multiple events (Apr 1, 3, 4, 5) means the sandstone has been repeatedly re-wetted with no sustained drying window.
Just ~24 hours since the last rain (1.4mm on Apr 5) is well below the 48–72 hour minimum guideline for Fell Sandstone after repeated wetting.
Average temperature of 7°C over the past week limits evaporation rates, and the overnight low of 0.3°C approaches freeze-thaw territory.
The open hilltop setting with SW aspect and recent strong winds (up to 60 km/h) provides the best possible drying conditions for this rock type, partially offsetting the frequent rain.
Today's humidity of 68% is below average for the week and allows some net evaporation from the rock surface.
39.9mm over the past 28 days with no extended dry spell longer than ~5 days means the rock has not had a genuine opportunity to dry out internally this month.
The min temperature of 0.3°C on April 6th, combined with likely internal moisture above the critical 60% pore saturation threshold, raises the possibility of minor freeze-thaw damage.
Recommendations
3
- Wait at least 2–3 more fully dry days (ideally until April 8–9 at the earliest) before visiting, and only then if the forecast rain on April 8th does not materialise.
- If you do visit, check the ground at the base of the buttresses — if the soil or turf is damp, the rock is almost certainly still wet internally and you should not climb.
- Consider nearby non-porous alternatives such as whinstone crags (e.g. Great Wanney, Bowden Doors' whinstone) which are less susceptible to moisture damage if you need a climbing fix this week.
Do Not Climb
60%
8 days ago
The crag received 6.1mm on April 3rd, 2.4mm on April 4th, and 1.6mm today (April 5th), meaning there have been zero consecutive dry days. Despite the exposed aspect and strong winds, Fell Sandstone needs at least 2–3 dry days after this cumulative wetting, and the rock is almost certainly still damp internally.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's exposed, open position and SW aspect give it significantly better drying than its sheltered woodland neighbour Kyloe-in-the-Woods, but this advantage is negated when rain fell today.
- The isolated buttresses (Saints Wall, Space Buttress, Central Wall) vary in exposure — some may have sheltered faces or lower sections that hold moisture longer than the main SW-facing surfaces.
- Access is permissive via agreement with the farmer; climbing on wet sandstone risks both rock damage and the goodwill that maintains access — the NMC 'Love the rocks' ethic applies directly here.
- March was persistently unsettled with 40.5mm over 28 days; the cumulative moisture loading means the sandstone's pore network is likely more saturated than a single rain event would suggest.
Warnings
2
- Climbing on wet Fell Sandstone causes permanent, irreversible damage to holds — the NMC ethic of 'Love the rocks' means waiting is not optional, it is essential.
- Access at Kyloe Out is permissive; climbing on damp rock risks not only route damage but potential loss of access for all climbers.
Reasoning
Rain fell today (1.6mm), yesterday (2.4mm), and on April 3rd (6.1mm), totalling over 10mm in three days with zero dry days — the rock is certainly wet both externally and internally.
Today's very strong 59 km/h westerly wind and the SW aspect will accelerate surface drying, but with rain falling today there has been no meaningful drying period yet — at least 48 hours of dry weather is needed from the last wetting.
The cumulative wetting over recent days means pore saturation is likely well above the 1% threshold where significant weakening begins; climbing risks hold breakage and permanent grain loosening on these fine-grained Fell Sandstone buttresses.
Early April in Northumberland brings cool temperatures (averaging 7°C) and variable weather; while conditions are improving from winter, overnight lows near 1–2°C slow drying considerably and mild freeze-thaw risk persists.
Contributing Factors
6
1.6mm of precipitation today means zero consecutive dry days and the rock surface is currently wet.
Over 10mm fell across April 3–5, following a generally unsettled March with 40.5mm total over 28 days, resulting in high cumulative pore moisture loading.
Today's 59 km/h westerly wind and the crag's exposed position will significantly accelerate surface evaporation once rain stops.
The south-westerly aspect receives good spring solar radiation, aiding drying during afternoon hours.
Average temperatures around 7°C with overnight lows near 1–2°C slow evaporation and internal drying rates.
Humidity averaging 72% over the past week is neither ideal for drying nor excessively damp, though today's 69% with strong wind is relatively favourable once rain ceases.
Recommendations
3
- Do not climb today — rain fell this morning/afternoon and the sandstone is wet; wait for at least 2 full dry days before visiting.
- Monitor conditions from April 7th onwards; if the forecast dry spell holds, April 8th (after 2+ dry days, warmer temperatures, and SW winds) is the earliest reasonable window to assess conditions on-site.
- On arrival, check the ground at the base of each buttress — if soil or sand is visibly moist, the rock interior is still too wet to climb safely.
Do Not Climb
90%
9 days ago
Kyloe Out received 3.7mm of rain today (April 4th) on top of 6.1mm yesterday and 4.6mm on April 1st, meaning the porous Fell Sandstone is currently wet and has had zero consecutive dry days. Even with its exposed SW aspect and good wind, the rock needs at least 2–3 dry days before climbing is appropriate, and no such window is available yet.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- The crag's isolated open buttresses (Saints Wall, Space Buttress, Central Wall) benefit from excellent wind exposure on all sides, which is the main advantage for drying — but this cannot compensate for rain falling today.
- Being SW-facing and exposed at 105m, Kyloe Out dries significantly faster than its sheltered woodland neighbour Kyloe-in-the-Woods, but the 2–3 dry day minimum still applies after the recent cumulative rainfall.
- The scattered buttress layout means some faces may catch rain from different angles, and lower sections and cracks will retain moisture longest — base-of-crag ground moisture is a reliable field indicator here.
- Access is permissive via agreement with the farmer; climbing on visibly wet sandstone risks both the access agreement and permanent damage to these irreplaceable Fell Sandstone routes.
Warnings
3
- Fell Sandstone loses up to 50% of its compressive strength when wet — climbing now risks permanent hold breakage and irreversible route damage.
- Overnight lows near 0°C combined with saturated rock create freeze-thaw conditions that cause cumulative structural deterioration.
- Access at Kyloe Out is permissive; climbing on wet rock jeopardises the access agreement with the landowner.
Reasoning
With 3.7mm today, 6.1mm yesterday, and 4.6mm on April 1st — totalling 14.7mm in the last four days — the rock is currently saturated or near-saturated, and the porous Fell Sandstone will have absorbed water deep into its structure.
Despite the strong SW winds (35.6 km/h today) and exposed aspect aiding surface evaporation, zero consecutive dry days means drying has not meaningfully begun; the interior will remain wet well beyond surface appearance.
At current moisture levels the rock faces a 10–50% compressive strength reduction, with iron oxide cemented holds particularly vulnerable to breakage — climbing now risks permanent and irreversible damage to routes.
Early April in Northumberland brings variable conditions with overnight lows near freezing (1.9°C tonight), raising additional freeze-thaw concerns for moisture-laden sandstone; the cumulative 40.2mm over 28 days reflects a wet late-winter/early-spring pattern.
Contributing Factors
6
3.7mm today following 6.1mm yesterday gives zero consecutive dry days and ensures the rock is thoroughly wet.
16.7mm in the last 7 days and 40.2mm over 28 days means the sandstone has been subjected to repeated wetting cycles with inadequate drying windows.
Strong SW winds (35+ km/h) and open exposed aspect will accelerate surface drying once rain stops, but this advantage cannot overcome same-day rain.
Temperatures around 7–10°C are adequate for slow evaporation but not warm enough to drive rapid drying of deeply saturated sandstone.
Overnight lows of 1.9°C tonight and forecast 2.2°C tomorrow bring freeze-thaw risk to moisture-laden rock, especially given pore saturation likely exceeds the critical 60% threshold.
Average humidity of 73% over the past week limits evaporative drying potential, keeping internal moisture elevated.
Recommendations
3
- Do not climb today — the rock is wet from today's rain and needs a minimum of 2–3 consecutive dry days before conditions could be suitable.
- Monitor the forecast from April 6th onwards; if the predicted dry spell holds with no rain on the 5th beyond the 1.4mm forecast, conditions may begin to improve by April 7th or 8th.
- Before any visit, check that the ground at the base of the buttresses is sandy-dry — if the soil is still moist, the rock interior will be too.
Do Not Climb
70%
10 days ago
Today has seen 2.2mm of rain, and there has been no consecutive dry day run — the rock is almost certainly still holding moisture. Despite Kyloe Out's exposed, SW-facing aspect offering above-average drying potential, the repeated light wettings over recent days (4.6mm on April 1st, 0.3mm on April 2nd, 2.2mm today) mean the sandstone has not had the required 2–3 continuous dry days to dry out internally.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Kyloe Out's isolated buttresses (Saints Wall, Space Buttress, Central Wall) are fully exposed to wind from the prevailing SW direction, which significantly aids drying compared to the sheltered Kyloe-in-the-Woods — but repeated wettings negate this advantage.
- The open fell-top setting means no tree canopy to trap moisture, but also means rain reaches all faces directly with no shelter; base sections of the buttresses may hold moisture longer where grass and soil retain dampness.
- The scattered buttress layout means some blocks may dry faster than others — smaller, more isolated blocks with greater surface-area-to-volume ratios will shed moisture quicker than larger walls like Central Wall.
- Access is permissive via agreement with the farmer; climbing on visibly damp rock risks not only route damage but could jeopardise continued access to this crag.
Warnings
3
- Fell Sandstone loses up to 50% of its compressive strength when wet — holds that feel solid when dry can snap off without warning, risking serious injury.
- The rock surface may appear dry while the interior remains saturated; do not rely on visual inspection alone after only one dry day.
- Climbing on damp sandstone causes permanent, irreversible damage to routes and could jeopardise the permissive access agreement with the landowner.
Reasoning
With 2.2mm of rain today on top of 4.6mm on April 1st and intermittent light precipitation throughout the past week (9.2mm total in 7 days), the porous Fell Sandstone is almost certainly holding significant internal moisture despite any surface drying between showers.
The SW aspect and strong winds (28–44 km/h recently) would normally aid rapid surface drying, but the repeated wetting cycle — with no run of even two consecutive fully dry days since March 30–31 — means the rock has never had a proper drying window to lose internal moisture.
Given the cumulative moisture loading from a wet March (37.9mm in 28 days) and ongoing intermittent rain, the high-porosity Fell Sandstone is at meaningful risk of strength reduction and grain loosening, particularly on well-trafficked holds.
Early spring conditions in Northumberland mean temperatures are only moderate (7–15°C), overnight lows occasionally dip near or below freezing creating some residual freeze-thaw risk, and the winter moisture legacy in the rock may not have fully dissipated.
Contributing Factors
7
Today's 2.2mm of precipitation has directly wetted the rock surface, resetting any drying progress from the previous day.
The zero consecutive dry days means the essential 2–3 day drying window required for Fell Sandstone has not been met.
Precipitation on April 1st (4.6mm), April 2nd (0.3mm), and today (2.2mm) has kept the rock in a repeatedly wetted state, preventing internal drying.
The fully exposed site with strong SW winds (28+ km/h) and favourable aspect provides the best possible drying conditions for this rock type — but cannot overcome the lack of a dry spell.
Temperatures around 8–15°C provide reasonable evaporation potential but are not warm enough for rapid drying of saturated sandstone.
Nearly 38mm of precipitation over the past 28 days means the sandstone has had sustained moisture input through the late winter period, likely maintaining elevated internal saturation.
Today's 76% humidity is neither especially high nor low, providing limited but not negligible evaporative potential.
Recommendations
3
- Wait for at least 2–3 consecutive fully dry days with wind before visiting; the earliest realistic window may be April 6–7 if the forecast holds.
- If visiting the area, consider checking Kyloe Out's base conditions — if the ground beneath the buttresses is damp, the rock is certainly too wet to climb.
- Use any dry spell to visit the crag for reconnaissance or bouldering pad sessions on the ground rather than climbing on the rock itself.
Climbing Outlook