Condition Analysis
AI-powered assessment using site data and 14-day weather history
Almscliff has experienced frequent light rain over the past week with no sustained dry spell, and today itself has 0.5mm of precipitation. Despite the exposed hilltop position and favourable S/W aspect, the cumulative moisture from repeated wettings (42mm over 28 days with rain on most recent days) means the gritstone is very likely still holding internal moisture. We recommend not climbing today.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's hilltop exposure to westerly and south-westerly winds is a significant drying advantage, but the persistent pattern of rain every 1–2 days has prevented any meaningful drying window from establishing.
- The Low Man tier and north-facing sections of High Man will retain moisture longer than the prominent south-facing walls; seepage lines around the central gully area are common after wet spells.
- Access is on private land and contingent on good behaviour — climbing on damp gritstone risks both permanent hold damage and potential access restrictions if landowner concerns arise.
- Late March/early April has seen 42mm of cumulative rain with very few consecutive dry days, meaning the rock has been repeatedly re-saturated before fully drying out.
Warnings
2
- Climbing on repeatedly wetted gritstone risks permanent hold breakage and route damage — the rock may feel surface-dry while remaining dangerously weakened internally.
- Access to Almscliff is on private land; climbing on damp rock and causing damage could jeopardise access for the entire climbing community.
Reasoning
Rain fell on April 11 (2.8mm), April 12 (1.9mm), and today April 13 (0.5mm), with no consecutive dry day since April 8; the gritstone is almost certainly still holding significant internal moisture despite surface winds.
Although the S/W aspect and exposed position aid drying, humidity has averaged 75% over the past week and there has been no dry window longer than about 18 hours since April 9, which is far short of the 24–48 hour minimum needed even after light rain.
Repeated wetting without full drying cycles means the gritstone is likely at elevated saturation, increasing the risk of grain loosening and hold breakage — particularly on well-trafficked problems and routes.
Early spring conditions with overnight temperatures dropping near freezing (min 2.4°C today, 0.7°C on April 6) create some freeze-thaw risk on rock that has not fully dried, though daytime temps are reasonable for drying.
Contributing Factors
8
Rain has fallen on 5 of the last 7 days (April 5, 9, 11, 12, 13) totalling 6.4mm with no sustained dry period, keeping the rock in a repeatedly wetted state.
Zero consecutive dry days heading into today means the minimum 24–48 hour drying window for even light rain has not been met.
Almscliff's exposed hilltop with strong westerly winds (averaging ~30 km/h recently) significantly accelerates surface evaporation compared to sheltered crags.
South and west-facing rock receives good solar radiation during spring afternoons, aiding surface drying when the sun breaks through.
42mm over 28 days with rain on most days means the rock has been repeatedly re-saturated, preventing deep drying and keeping internal moisture levels high.
Average humidity of 75% over the past week limits evaporative drying potential, though it is not critically high.
Overnight lows around 2–4°C slow drying but are currently above the freeze-thaw danger zone for most nights, reducing but not eliminating freeze-thaw risk.
0.5mm forecast for today resets the drying clock yet again, preventing meaningful progress toward dry conditions.
Recommendations
3
- Wait for at least 48 hours of completely dry weather with temperatures above 8°C before visiting — the current pattern of near-daily light rain has not allowed adequate drying.
- If you do visit, check the base of the crag: if the ground is damp or mud is soft, the rock is almost certainly still wet internally and should not be climbed.
- Consider the dry window forecast for April 16–17 (two consecutive dry days with moderate temps and lower humidity) as the next realistic climbing opportunity, but verify conditions on arrival.
Previous Analyses
Do Not Climb
65%
2 days ago
Almscliff has had a persistently unsettled period with frequent light rain events — 2.8mm on April 11 and 1.2mm today (April 12) mean the rock has had zero consecutive dry days. Despite the exposed hilltop position and favourable SW aspect, the gritstone will not have had adequate time to dry internally and climbing today is not recommended.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's hilltop exposure and S/W aspect are significant drying advantages, but the repeated rain events over the past two weeks have prevented any meaningful cumulative drying.
- The Low Man tier, being lower and more sheltered, will retain moisture longer than the upper High Man faces — avoid lower-tier problems especially.
- Almscliff sits on private land with permissive access; climbing on damp gritstone risks both permanent rock damage and potential access restrictions from the landowner.
- Known seepage lines on the north-facing aspects and in crack systems (e.g. around Great Western and Wall of Horrors area) will be particularly slow to dry given the recent prolonged wet spell.
Warnings
2
- Do not climb on Almscliff today — the gritstone has had zero dry days and is carrying significant internal moisture, risking permanent hold breakage and route damage.
- Access to Almscliff is on private land by permission only; climbing on damp rock risks both the crag and continued access for all climbers.
Reasoning
With 2.8mm on April 11 and 1.2mm today (April 12), plus a cumulative 44.2mm over the past 28 days with only brief dry interludes, the gritstone is likely carrying significant internal moisture despite possibly appearing surface-dry in places.
The strong SW winds (32 km/h today) and favourable south/west aspect aid surface drying, but with zero consecutive dry days and repeated wetting events, internal drying has been continually reset — the rock needs at least 48 hours of genuinely dry weather to begin recovering.
Repeated wetting cycles over the past month combined with spring temperatures oscillating near freezing overnight (min 2.2°C today, 0.7°C on April 6) create cumulative weakening of the gritstone; holds are at elevated risk of breakage.
Early April in Yorkshire is a transitional period with unreliable drying conditions; the pattern of frequent light showers interspersed with brief dry spells is typical and means the rock rarely achieves full dryness at this time of year.
Contributing Factors
6
Rain fell on April 11 (2.8mm) and today April 12 (1.2mm), with no consecutive dry days, meaning the gritstone has been repeatedly re-wetted before any meaningful internal drying could occur.
44.2mm over 28 days spread across many rain events has kept the rock in a near-continuously damp state, preventing the deep drying that porous gritstone requires.
Strong SW winds at 32 km/h today and the fully exposed hilltop position significantly accelerate surface evaporation compared to sheltered crags.
The south and west-facing aspects receive good solar radiation and prevailing wind, giving Almscliff above-average drying speed for a gritstone crag.
Average humidity of 73% over the past week is moderate but still high enough to slow evaporative drying, particularly for internal moisture.
Minimum temperatures dipping to 0.7–2.2°C in recent days with internally wet rock create some freeze-thaw risk, though the rock is unlikely to be at critical saturation levels.
Recommendations
3
- Wait for at least 48 hours of genuinely dry weather before visiting — the earliest realistic window may be April 14 if April 13 stays near-dry, but check conditions on arrival.
- If you do visit, perform the ground-moisture test: if the soil at the base of the crag is damp, the rock is certainly still wet internally — do not climb.
- Consider non-porous alternatives in the area (e.g. limestone at Malham or Kilnsey) if you need a climbing fix while Almscliff dries out.
Do Not Climb
60%
3 days ago
Almscliff has had a persistently unsettled spell with frequent light rain events over the past two weeks, including 1.7mm today, and zero consecutive dry days. Despite the exposed hilltop position and strong westerly winds aiding drying, the cumulative moisture loading and lack of any sustained dry period mean the gritstone is very likely still holding internal moisture.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's hilltop exposure and S/W aspect are significant drying advantages, but the relentless pattern of rain every 1–2 days has prevented any meaningful drying window from opening up.
- Low Man's lower tier and north-facing nooks will be retaining moisture far longer than the exposed upper faces of High Man — avoid lower-tier problems entirely.
- The crag sits on private land with permissive access; climbing on damp gritstone risks both route damage and the goodwill of the landowner, potentially jeopardising future access.
- Seepage lines on the west face of High Man and around the Great Western area are common after prolonged wet spells and may persist even when upper faces appear dry.
Warnings
2
- Climbing on damp gritstone causes permanent, irreversible damage to holds and route surfaces — Almscliff's classic problems are irreplaceable.
- Access to Almscliff is on private land by permission; climbing in poor conditions risks losing access for the entire climbing community.
Reasoning
With 1.7mm of rain today, 5.2mm in the last 7 days spread across multiple events, and 41.9mm over the past 28 days with no sustained dry spell, the gritstone is almost certainly holding significant internal moisture despite surface appearance.
Strong winds (30–50 km/h from W/SW/S) and the S/W aspect have been helping surface evaporation, but with rain falling every 1–2 days the rock has never had the 48+ hours of dry weather needed to properly dry internally after each wetting event.
The cumulative effect of repeated wetting cycles through late winter and early spring means the gritstone is in a vulnerable state — grain cohesion will be reduced and holds are at elevated risk of breakage, particularly on well-trafficked problems.
Early April in Yorkshire still brings cool temperatures (averaging ~8°C), moderate humidity (~72%), and limited solar intensity — drying rates are well below summer levels, and overnight near-frost temperatures further slow the process.
Contributing Factors
7
Rain falling today means zero consecutive dry days and the rock surface is freshly wet, resetting any partial drying progress.
Over the past two weeks, rain has fallen on at least 8 of 14 days with no dry window exceeding 2 days, preventing the rock from drying internally.
Nearly 42mm over 28 days with frequent small events means the gritstone has been repeatedly re-saturated without adequate drying time between events.
Sustained winds of 25–50 km/h from the west and south have been excellent for surface drying, and Almscliff's exposed hilltop maximises this benefit.
The south and west-facing aspects receive reasonable solar radiation in early April, aiding surface evaporation during daylight hours.
Current humidity around 66% is moderate — not ideal for rapid drying but not prohibitively high either.
Average temperatures around 8°C with overnight lows near freezing slow evaporation rates significantly compared to summer conditions.
Recommendations
3
- Wait for a sustained dry spell of at least 48 hours with wind and sun before visiting — the current pattern of rain every day or two is not allowing the gritstone to dry.
- If you do visit, check the ground at the base of the crag: if it is damp, the rock is certainly still wet internally regardless of surface appearance.
- Consider alternative non-porous venues (limestone or whinstone) until a proper dry window materialises.
Do Not Climb
45%
4 days ago
Despite a dry day today with good wind, yesterday's rain (1.1mm on April 9th) and a pattern of frequent light showers over the past two weeks mean the gritstone has had insufficient drying time. The rock may appear surface-dry in exposed spots but is likely still holding internal moisture, particularly on lower tiers and sheltered faces.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's exposed hilltop position and strong SW winds today (35 km/h) will aid surface drying, but the crag has only had one full dry day since the last rain on April 9th.
- The lower tier (Low Man) is more sheltered and retains moisture longer than the upper sections of High Man — expect noticeably damper conditions on Low Man.
- The past 28 days have seen 44mm of cumulative rainfall spread across many events, keeping the porous gritstone in a persistently recharged state with little opportunity for deep drying.
- North-facing aspects and recessed crack systems (common on Almscliff's trad routes) will hold moisture well beyond what exposed south/west faces show on the surface.
Warnings
2
- Almscliff is on private land — climbing on wet gritstone risks both permanent route damage and potential access restrictions if landowner concerns arise.
- Tomorrow's forecast brings 5.2mm of rain which will fully re-wet the rock, so today is not the start of a drying window.
Reasoning
With 1.1mm of rain yesterday and only one dry day since, combined with a persistently wet March–April pattern (44mm over 28 days with very few consecutive dry days), the gritstone is almost certainly holding significant internal moisture despite possible surface drying.
Today's strong SW wind (35 km/h) and moderate temperature (9.4°C) with low humidity (66%) provide good surface drying conditions, but a single day is insufficient to dry porous gritstone after repeated wetting events — the two-day minimum rule is not met.
The cumulative wetting pattern means the rock has been near-continuously recharged for weeks; climbing now risks grain loosening and hold breakage on a crag where route integrity is already under pressure from heavy use.
Early spring conditions with cool overnight temperatures (2.1°C min) slow drying overnight, and the persistent wet weather pattern typical of March–April in Yorkshire means the rock has had almost no opportunity for deep drying this season.
Contributing Factors
8
1.1mm fell on April 9th, giving only one full dry day — well short of the 24–48 hour minimum even for light rain.
44mm over 28 days with very few consecutive dry days means the gritstone has been repeatedly recharged with no opportunity for deep drying.
35 km/h SW wind on an exposed hilltop significantly accelerates surface evaporation.
66% humidity is the lowest in over a week, creating a good vapour pressure gradient for drying.
9.4°C is adequate for some evaporation but not warm enough to drive rapid deep drying.
Overnight minimum of 2.1°C means drying essentially halts for many hours, limiting cumulative drying progress.
The favourable aspect receives good solar radiation through the day, aiding drying on south and west faces.
Early April in Yorkshire often brings persistent unsettled weather; the rock has had no extended dry spell this spring to fully dry out.
Recommendations
3
- Wait for at least one more full dry day before climbing — if tomorrow's forecast rain (5.2mm) arrives, conditions will reset and you should wait 48+ hours from the last rain.
- If you visit, test the ground at the base of the crag: if the soil or turf is damp, the rock is almost certainly still wet internally.
- Focus any future dry-window sessions on the most exposed upper sections of High Man on south/west faces, and avoid crack climbs and lower-tier problems which hold moisture longest.
Marginal — Assess Conditions
68%
5 days ago
Almscliff has had four consecutive dry days including an excellent warm, sunny day yesterday (19.6°C, low humidity), following only light, scattered rain in the preceding week. The exposed hilltop position and S/W aspect should have aided drying, but the cumulative 53.8mm over 28 days and persistent moderate humidity mean a visual check on arrival is strongly recommended before committing to climb.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's hilltop position is one of the most exposed gritstone crags in Yorkshire, meaning wind-assisted drying is significantly better than at sheltered valley crags.
- The north-facing walls of High Man and any shaded recesses between the two tiers will retain moisture much longer than the sun-catching south and west faces.
- Known seepage lines exist on several routes, particularly on the lower tier and in crack systems — these can weep for days after rain even when faces appear dry.
- Access is on private land and the Yorkshire gritstone ethic strongly prioritises rock conservation; climbing on damp grit here risks both hold damage and potential access restrictions.
Warnings
2
- Seepage lines in crack systems and on the lower tier may still be active despite surface rock appearing dry.
- The prolonged wet March means internal moisture could persist even where the surface feels dry — use the ground-moisture test before climbing.
Reasoning
The last meaningful rain was 2.3mm on April 5th (four days ago), preceded by a scattered wet spell from March 24th onwards totalling ~19mm over 12 days, meaning the rock experienced prolonged wetting before this dry window.
Four dry days with a particularly good drying day on April 8th (19.6°C max, humidity dropping to 51%, moderate SW wind) on an exposed S/W-facing hilltop should have dried surface and near-surface rock well, though deeper saturation from the prolonged wet March may linger.
With 53.8mm over 28 days and only four days of drying, there is a residual risk of internal moisture in deeper features, cracks, and seepage zones — hold breakage risk is moderate rather than negligible.
Early April in Yorkshire brings improving but still unpredictable conditions; overnight lows near freezing (0.7°C on April 6th, 1.6°C on April 7th) could have caused minor freeze-thaw stress on any residual internal moisture.
Contributing Factors
7
No rain since April 5th (2.3mm), giving four full days of drying including an exceptionally warm and sunny April 8th.
April 8th reached 19.6°C with humidity as low as 51% and clear skies through the afternoon — outstanding evaporation conditions for early April.
Almscliff's exposed position and south/west-facing rock maximises wind and solar drying, making it one of the faster-drying Yorkshire gritstone crags.
53.8mm over 28 days with repeated wetting events means the rock experienced prolonged saturation before this dry spell, and deeper moisture may persist.
Average humidity over the last 7 days is 75%, and overnight humidity has been 80-90%, which slows drying particularly during the ~14 hours of darkness.
Recent overnight minima of 0.7°C and 1.6°C could cause minor freeze-thaw stress in any rock retaining internal moisture from the wet March.
Today (April 9th) is forecast dry with 13.7°C, 78% humidity, and a brisk 34.9 km/h westerly wind — continuing the drying trend.
Recommendations
3
- Visually inspect the rock on arrival — check crack systems and the base of the crag for dampness; if the ground at the crag foot is moist, the rock likely retains internal moisture.
- Prioritise the upper sections of High Man's south and west faces, which will have dried fastest; avoid north-facing walls and lower-tier routes near ground level.
- If any doubt remains on arrival, treat it as a rest day — Yorkshire gritstone is irreplaceable and the access at Almscliff depends on responsible behaviour.
Marginal — Assess Conditions
62%
6 days ago
Almscliff has had two full dry days (April 6–7) with excellent drying conditions yesterday (warm, sunny, low humidity, moderate wind), following light rain on April 5 (2.3mm). However, the preceding weeks have been persistently wet (54.8mm in 28 days) and the rock may still hold residual internal moisture despite the surface likely appearing dry. A visual on-ground assessment is warranted before committing to climb.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's exposed hilltop position and S/W aspect mean yesterday's 16°C sunshine with 43–46% humidity and moderate SE wind would have provided excellent surface drying across much of High Man and Low Man.
- The crag has received repeated small rain events through late March and early April (54.8mm over 28 days), meaning the gritstone's internal moisture content is likely elevated even if the surface feels dry — a classic 'looks dry but isn't' scenario for porous rock.
- Low Man's lower tier and any north-facing or sheltered faces (particularly the back of the crag and shaded gullies) will have dried significantly slower and may still hold dampness.
- Today's forecast shows 0.1mm precipitation and rising humidity (77%), which won't help further drying — climbers should aim for the afternoon when temperatures peak and humidity drops.
Warnings
2
- The surface may appear and feel dry while the interior gritstone remains damp — this is the highest-risk scenario for hold breakage on well-trafficked problems.
- Access to Almscliff is on private land; climbing on damp rock risks both permanent route damage and potential access restrictions if landowner relationships are harmed.
Reasoning
Two consecutive dry days with strong drying conditions yesterday likely dried the surface well, but 54.8mm of rain over the preceding 28 days — with frequent small re-wetting events — means the gritstone's interior pore network may still hold significant residual moisture.
Yesterday provided outstanding drying: clear skies, 16°C peak, humidity dropping to 43%, and moderate wind on an exposed S/W-facing hilltop — this is close to ideal, but only represents about 36 hours of effective drying since the last rain (2.3mm on April 5).
The cumulative wet March–April pattern raises concern about internal moisture weakening grain bonds, particularly on holds that see high traffic on popular problems like Wall of Horrors or Donut; even surface-dry gritstone can suffer grain loss if the interior hasn't fully dried.
Early April in Yorkshire brings improving but unreliable conditions; overnight lows near freezing (0.7°C on April 6) combined with residual moisture create some freeze-thaw concern, though the risk is diminishing as spring progresses.
Contributing Factors
6
April 6 and 7 were both dry, providing roughly 48 hours since the last meaningful rain (2.3mm on April 5), which meets the minimum guideline for light rain in good conditions.
Clear skies, 16.3°C peak, humidity as low as 43%, and moderate wind on this exposed S/W hilltop created near-ideal evaporative conditions throughout April 7.
54.8mm over 28 days with frequent re-wetting events (rain on 7 of the last 14 days) means internal pore saturation is likely elevated beyond what two dry days can fully address.
Almscliff's fully exposed hilltop setting maximises wind-driven evaporation, which is the dominant drying mechanism and gives this crag faster-than-average drying for gritstone.
Overnight humidity rose to 84% with temperatures dropping to 7°C, and today's forecast humidity of 77% will slow continued drying compared to yesterday's exceptional conditions.
The 0.1mm forecast for today is negligible and unlikely to meaningfully re-wet the rock, but it does reset the consecutive dry day count to zero technically.
Recommendations
3
- Visit in the afternoon when temperatures peak and humidity is lowest, and perform a thorough touch-test on multiple holds — if any feel cool or tacky, do not climb.
- Focus on upper sections of High Man and well-exposed south/west-facing walls, which will have dried most thoroughly; avoid lower tier problems and any sheltered or north-facing rock.
- Given the prolonged wet period, be especially gentle with holds — use an open palm to test for grain looseness before committing weight, and brush lightly with a boar's hair brush only.
Marginal — Assess Conditions
55%
8 days ago
The last significant rain was 2.3mm on April 5th (yesterday), spread as light showers throughout the day, with the last trace at 19:00. Strong winds during the rain and Almscliff's exposed hilltop position will have aided drying, but only ~24 hours have elapsed and the preceding weeks have been persistently wet (54.7mm in 28 days), meaning the rock's internal moisture content is likely elevated. Climbers should visually and physically assess conditions on arrival — the surface may be dry but internal dampness is plausible.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's hilltop position is fully exposed to the prevailing SW/W winds that have been blowing consistently, which is the single biggest factor aiding drying at this crag.
- The north-facing walls and lower sections of Low Man are sheltered from the S/W aspect sun and will retain moisture significantly longer than the sun-facing upper walls of High Man.
- The crag has experienced a very wet March with 54.7mm over 28 days and only brief dry spells, meaning cumulative internal moisture loading in the gritstone is likely high despite today's dry surface appearance.
- Private land access is a privilege — climbing on damp rock risks both permanent route damage and potential access restrictions from the landowner.
Warnings
3
- Only one dry day has elapsed since yesterday's showers — the standard minimum of two dry days for gritstone has not been met.
- The persistently wet March means internal moisture may be higher than light recent rainfall alone would suggest — surface dryness does not guarantee safe conditions.
- Access is on private land; climbing on damp rock risks permanent route damage and could jeopardise continued access for all climbers.
Reasoning
Yesterday's 2.3mm of scattered showers on top of a wet preceding month (54.7mm in 28 days with few consecutive dry days) means the gritstone likely retains elevated internal moisture despite only light recent rain.
Approximately 24 hours of drying since the last shower, with strong winds (50+ km/h) yesterday afternoon aiding surface evaporation, and today's 71% humidity and S-facing aspect provide reasonable but not ideal drying — the exposed position is the key advantage here.
The persistently wet late March pattern means cumulative moisture loading raises the risk of weakened grain bonds, particularly on lower and north-facing sections where drying is slowest.
Early April in Yorkshire brings improving but unreliable conditions; overnight lows near freezing (1.5°C today) combined with residual internal moisture pose a minor freeze-thaw concern, though the rock is unlikely to be critically saturated.
Contributing Factors
8
2.3mm fell as scattered showers across April 5th, with the last trace at 19:00, giving only about 24 hours of drying.
54.7mm over 28 days with very few consecutive dry days means the gritstone's internal moisture content is likely elevated well above baseline.
Almscliff's exposed position caught strong winds (50+ km/h) yesterday and moderate winds today, which significantly accelerates surface and near-surface drying.
Today is forecast dry with 71% humidity, 12.6°C max, and a south wind — decent drying conditions for early April.
Average humidity of 78% over the last 7 days limits evaporative drying potential and indicates the air has been consistently moist.
The dominant S/W aspect receives good April sunshine when available, warming the rock surface and aiding evaporation on sun-facing walls.
With only one full dry day elapsed, the standard two-day minimum for porous rock after even light rain has not been met.
Overnight lows of 1.5°C today and forecast 2.2°C tomorrow sit near freezing; any residual internal moisture could undergo minor freeze-thaw stress.
Recommendations
3
- Wait until tomorrow (April 7th) for a second full dry day — warmer temperatures (16.6°C) and continued wind will significantly improve conditions on sun-facing walls.
- If visiting today, perform a thorough touch test on the rock and check that the ground at the crag base is completely dry before committing to climb.
- Focus on the upper, south-facing walls of High Man which will dry fastest; avoid lower sections of Low Man, north-facing walls, and any areas with visible seepage or dark patches.
Do Not Climb
45%
9 days ago
Almscliff has had no consecutive dry days — light but persistent rain fell today (1.3mm) and on each of the preceding four days, following heavier rain on March 24th (11.1mm) and a very unsettled late March. Despite strong winds and the exposed hilltop position aiding surface drying, the cumulative moisture loading from weeks of frequent rainfall means the gritstone is very likely still damp internally. We recommend waiting for the promising dry spell forecast from tomorrow.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's exposed hilltop position and S/W aspect mean it benefits greatly from the strong westerly winds seen recently (40–50+ km/h), which will accelerate surface drying significantly compared to sheltered crags.
- The lower tier (Low Man) and north-facing sections will retain moisture much longer than the sunlit upper walls of High Man — even when upper faces feel dry, Low Man can remain greasy.
- The crag's compact gritstone holds seepage in horizontal break lines and around the many crack systems; after prolonged wet spells these seepage zones can weep for days after the last rain.
- Access is on private land and the Yorkshire gritstone ethic strongly discourages climbing on damp rock — any damage from wet climbing risks both route degradation and potential access restrictions.
Warnings
3
- Do not climb today — rain fell this morning and the gritstone has had zero consecutive dry days; surface-dry appearance in the wind is deceptive.
- Overnight freezing temperatures combined with wet rock create active freeze-thaw conditions that weaken the gritstone — climbing in these conditions risks permanent hold damage.
- Access to Almscliff is on private land; climbing on visibly damp rock risks both route damage and potential access restrictions from the landowner.
Reasoning
Zero consecutive dry days with light rain today (1.3mm) on top of repeated small rainfall events over the past two weeks (53.7mm in 28 days) means the rock almost certainly has elevated internal moisture despite any surface drying between showers.
The very strong westerly winds (40–50+ km/h) and S/W aspect have helped strip surface moisture quickly between rain events, but with rain falling again today the drying clock has reset and the rock has not had the 48+ hours of dry weather needed after the cumulative wetting.
Repeated wetting over the past month without adequate drying periods means the gritstone is likely at elevated saturation, increasing the risk of hold breakage and grain loosening — particularly on well-trafficked boulder problems.
Early April in Yorkshire brings improving temperatures but still-cool overnight lows (near or below freezing), and the overnight frost risk (0.6°C today, 0.5°C tomorrow) combined with residual moisture raises freeze-thaw concerns at 270m altitude.
Contributing Factors
7
Light rain today (1.3mm) continues a pattern of near-daily precipitation over the past two weeks, resetting the drying clock and maintaining elevated rock moisture.
53.7mm over 28 days with very few consecutive dry days means the gritstone has had no opportunity to fully dry out at depth.
Sustained strong westerly winds (today 51.5 km/h) on this exposed hilltop significantly accelerate surface evaporation between rain events.
The south and west-facing aspects receive reasonable solar radiation even in early April, aiding surface drying on the main faces.
Average humidity of 78% over the past week limits evaporative drying potential despite strong winds.
Minimum temperatures near 0°C tonight and tomorrow (0.5–0.6°C) combined with residual moisture in the rock create freeze-thaw damage potential.
Three fully dry days forecast from April 6–8 with warming temperatures up to 17°C should allow meaningful drying if no further rain falls.
Recommendations
3
- Wait at least until April 8th — three dry days with warming temperatures and lower humidity should allow the exposed upper faces to dry adequately, though check sheltered and lower sections carefully.
- On arrival after the dry spell, test conditions by feeling the base of the crag and inside crack lines; if these are cool and damp to the touch, the rock is still too wet internally.
- Avoid Low Man and any north-facing or sheltered sections first — start on the highest, most exposed south-facing walls of High Man where drying will be most advanced.
Do Not Climb
55%
10 days ago
Almscliff has seen frequent light-to-moderate rain over the past 10 days with no consecutive dry period longer than one day, and today itself has received 0.7mm. Despite strong SW winds aiding surface drying, the cumulative moisture loading from 51.7mm over the past 28 days and persistent humidity around 80% means the gritstone is very likely still holding internal moisture. We recommend waiting for the promising dry spell forecast from April 6th onwards.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's exposed hilltop position and strong prevailing SW/W winds (consistently 30–50 km/h this week) provide excellent surface drying, but this can create a deceptively dry-looking surface while interior moisture persists in the porous gritstone.
- The Low Man tier and north-facing aspects of High Man will retain moisture significantly longer than the south/west-facing walls — seepage at the base of both tiers is likely given the cumulative rainfall pattern.
- Private land access is a privilege at Almscliff — climbing on damp rock risks both route damage and potential access restrictions; the Yorkshire gritstone ethic firmly prohibits climbing on wet or suspect rock.
- Late March saw a near-freeze event (−0.9°C on March 26) following heavy rain on March 24–25, raising the possibility of freeze-thaw micro-damage in saturated rock; inspect holds carefully even when conditions improve.
Warnings
2
- Do not climb today — the rock has had zero consecutive dry days and is almost certainly holding significant internal moisture despite any surface drying from wind.
- The gritstone surface may feel dry to the touch due to strong winds but the interior will still be damp — this is the most dangerous condition for hold breakage and permanent route damage.
Reasoning
The rock has received rain on 7 of the last 10 days totalling over 14mm with no meaningful dry window, and the 28-day total of 51.7mm indicates significant cumulative moisture loading — the gritstone interior is almost certainly still damp.
Strong SW/W winds (30–50 km/h) and the south/west aspect would normally provide good drying, but persistent humidity averaging 80% and the lack of any consecutive dry period longer than one day have severely limited effective evaporation.
Cumulative wet-dry cycling over the past month, combined with at least one freeze-thaw event in late March when the rock was likely saturated, increases the risk of weakened holds and grain loosening on the gritstone.
Early April in Yorkshire is transitional — while daytime temperatures are now reaching 10–15°C which aids drying, nights are still cold (frequently near or below freezing) and the persistent Atlantic weather systems have kept moisture levels high.
Contributing Factors
7
Rain has fallen on 7 of the last 10 days with no consecutive dry period exceeding one day, preventing the gritstone from achieving meaningful internal drying.
Sustained SW/W winds of 30–50 km/h across the exposed hilltop significantly accelerate surface evaporation.
Average humidity of 80% over the past week substantially reduces the drying efficiency of even strong winds, limiting net evaporation from the rock surface.
51.7mm of rain over 28 days with frequent wetting events means the porous gritstone has had little opportunity to dry internally, maintaining elevated pore saturation.
The favourable S/W aspect receives good spring solar radiation with daytime temps reaching 13–15°C, aiding surface drying on exposed faces.
0.7mm today resets the drying clock, meaning zero consecutive dry days heading into the forecast period.
A sub-zero night on March 26 (−0.9°C) following heavy rain on March 24–25 likely caused freeze-thaw stress in saturated rock, potentially weakening holds.
Recommendations
3
- Wait for the dry spell forecast from April 6–8 (three consecutive dry days with dropping humidity to 65–67%) before visiting — this should provide the first adequate drying window in weeks.
- If visiting from April 7th onwards, perform a touch test at the base of both tiers and check for any darkened patches or seepage lines before committing to climb.
- Inspect holds carefully for looseness given the recent wet-freeze cycle, particularly on less-trafficked routes and at the top of High Man.
Do Not Climb
35%
11 days ago
Almscliff has seen repeated rain events over the past two weeks with no sustained dry spell — 11.5mm in the last 7 days alone, including rain today (1.0mm), and 55.6mm over the past 28 days. Despite the exposed hilltop position and good aspect, the lack of consecutive dry days means the gritstone is very likely still holding internal moisture and climbing today would risk both safety and rock damage.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Almscliff's hilltop exposure to prevailing SW/W winds is a significant drying advantage, but the relentless cycle of rain every 1–3 days through late March has prevented any meaningful drying window from developing.
- Low Man's lower tier and north-facing sections will be holding moisture far longer than the exposed upper faces of High Man; seepage lines on the lower tier are likely still active.
- The crag sits on private land with permissive access — climbing on damp gritstone risks not only rock damage but potential access restrictions if landowner concerns are raised.
- March has been an exceptionally wet month (55.6mm over 28 days) meaning cumulative moisture loading in the rock is high; surface drying alone is insufficient to indicate safe conditions internally.
Warnings
3
- Gritstone can appear surface-dry while remaining dangerously weakened internally — do not be deceived by a dry-looking surface after only one dry day.
- Climbing on damp gritstone causes permanent, irreversible damage to holds and route quality; Almscliff's classic problems are irreplaceable.
- Access is on private land and contingent on responsible behaviour — climbing in poor conditions risks future access restrictions.
Reasoning
With rain on 6 of the last 10 days (including today) and no period of more than 2 consecutive dry days since March 17, the gritstone is almost certainly retaining significant internal moisture despite any surface drying between showers.
Strong SW/W winds (29–45 km/h) and the south/west aspect have aided surface evaporation, but each drying window has been interrupted by fresh precipitation before the rock could dry through — the interior likely remains well above the critical 1% saturation threshold.
With repeated wetting cycles over 28 days and temperatures occasionally dipping near or below freezing (e.g. -0.9°C on March 26), there is elevated risk of grain loosening and hold breakage on loaded moves, particularly on well-trafficked problems.
Early April in Yorkshire is a transitional period with improving but unreliable conditions; average temperatures around 7°C are marginal for effective drying, and the cumulative winter/spring moisture loading has not yet had a chance to dissipate.
Contributing Factors
8
Rain fell on 6 of the last 10 days totalling 11.5mm with no consecutive dry spell longer than 2 days, preventing the rock from drying through.
Even light rain today resets the drying clock, meaning zero dry days have accumulated.
55.6mm over 28 days represents sustained saturation loading that requires an extended dry spell to reverse, not just surface drying.
Strong winds (37.8 km/h today from SW) and the exposed position significantly accelerate surface drying between rain events.
South and west-facing rock receives good solar radiation in spring, aiding evaporation on the main faces.
Average temperature of 7°C over the past week is marginal — enough for some evaporation but not the rapid drying that warmer conditions would provide.
Average humidity of 80% over the past 7 days significantly limits evaporative drying potential despite good wind exposure.
Recent overnight lows near or below freezing (e.g. -0.9°C on March 26, 0.6°C on March 22) with wet rock create freeze-thaw damage risk.
Recommendations
3
- Wait for at least 48–72 hours of completely dry weather with wind before attempting to climb — the forecast suggests April 6–7 may offer the first realistic window.
- If visiting, perform a thorough ground-moisture test: check that the soil and rock at the base of the crag is completely dry before touching any routes.
- Prioritise the upper, most exposed faces of High Man if conditions do improve, as these will dry first; avoid Low Man and any north-facing or sheltered sections.
Climbing Outlook