Condition Analysis
AI-powered assessment using site data and 14-day weather history
Rothley Crag has received repeated light-to-moderate precipitation over the past week (6.9mm in 7 days), with 3.2mm falling today and no consecutive dry days. The rock is almost certainly still wet internally despite any surface drying, and the unsettled pattern continues into the forecast.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- The condition report from April 6th noted that even after two dry days with sunshine, north-facing and shady boulders were still damp — the scattered boulder layout means many problems have varied aspects and some will hold moisture much longer than the main SE-S buttress.
- Rothley's open moorland setting at 215m means the ground stays boggy after wet spells, and capillary moisture from saturated peat/grass at the base of boulders can wick into the rock from below.
- Millstone Grit's coarser grain structure and feldspar content give it slightly different porosity from Fell Sandstone — it can appear surface-dry while retaining significant internal moisture, making visual assessment deceptive.
- The crag has had 41.7mm of rain in the last 28 days with very few extended dry windows, meaning the rock has had little opportunity to dry out fully at depth — a pattern consistent with prolonged seasonal saturation.
Warnings
2
- Climbing on wet Millstone Grit causes permanent, irreversible damage through grain loosening and hold breakage — the NMC ethic of 'Love the rocks' applies fully here.
- Recent overnight freezing temperatures combined with high internal rock saturation may have caused freeze-thaw micro-damage; be alert for any loose or hollow-sounding holds even when conditions eventually dry.
Reasoning
With 3.2mm of rain today, 1.5mm yesterday, and repeated wetting events over the past two weeks (including 5.7mm on March 29 and 4.2mm on April 3), the rock is almost certainly saturated internally despite any brief surface drying between showers.
The SE-S aspect and moderate wind exposure would normally aid drying, but there have been zero consecutive fully dry days recently, humidity has averaged 78% over the past week, and temperatures have been cool (~7°C average), meaning meaningful deep drying has not occurred.
With 41.7mm of rain in 28 days and repeated re-wetting, the Millstone Grit is likely at high internal saturation levels, posing a significant risk of grain loosening and hold breakage under climbing loads.
Early April at 215m altitude with overnight temperatures dropping below 0°C on several recent nights (April 2, 4, 5, 6) introduces freeze-thaw risk in saturated rock, compounding structural concerns.
Contributing Factors
7
3.2mm today and 1.5mm yesterday ensure the rock surface is freshly wet with no drying window.
The past two weeks have seen rain on most days (6.9mm in 7 days, 41.7mm in 28 days) with virtually no extended dry spells for deep drying.
Average temperature of just 7.1°C over the past week provides limited evaporative energy for drying porous gritstone.
Average humidity of 78% over the past week significantly reduces evaporation rate from the rock surface.
The south-facing aspect and partial wind exposure would aid drying if given consecutive dry days, but have been insufficient given the relentless re-wetting.
Several recent overnight lows below 0°C (-2.0°C on April 4, -1.7°C on April 6) combined with likely high internal saturation create active freeze-thaw damage risk.
Rain is forecast for the next three days (1.1mm, 5.7mm, 0.6mm) before a brief dry window on April 17.
Recommendations
3
- Do not climb today — the rock is freshly wet from today's 3.2mm of rain and has had no drying time.
- The earliest realistic window for assessment would be April 17–18 if the forecast holds dry, but even then check south-facing boulders carefully and avoid any that feel cool to the touch.
- Use the base-of-crag ground test: if the ground at the foot of boulders is damp, the rock is almost certainly still too wet internally to climb safely.
Previous Analyses
Do Not Climb
45%
1 days ago
Recent intermittent rain (1.3mm on Apr 11, 0.6mm today Apr 12) on top of a wet preceding period means the rock has not had adequate continuous drying time. While south-facing exposed boulders may appear dry on the surface, internal moisture levels are likely still elevated given the persistent wet pattern and moderate temperatures.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley is Millstone Grit rather than Fell Sandstone — coarser grain with different porosity, but still highly susceptible to strength loss when wet and must be treated with the same conservative drying standards.
- The April 6 condition report confirmed north-facing and shady boulders were still damp even after a dry spell; subsequent rain on Apr 9, 11, and 12 will have re-wetted much of the crag.
- The scattered boulder layout means individual blocks dry at very different rates — south-facing exposed boulders dry significantly faster than shaded or north-facing ones, so conditions will be highly variable across the venue.
- At 215m altitude with overnight lows dropping below 0°C on several recent nights (Apr 6: -1.7°C, Apr 10: 0.9°C), freeze-thaw cycling may be contributing to cumulative structural weakening of any moisture-bearing rock.
Warnings
3
- Climbing on inadequately dried Millstone Grit causes permanent and irreversible damage through grain loosening and hold breakage — damage that cannot be repaired.
- Surface-dry rock can still be dangerously weakened internally; the most common failure mode occurs when the surface looks climbable but the interior remains saturated.
- Freeze-thaw cycling on moisture-laden rock at this altitude may have already weakened some holds — exercise extra caution on any fragile-looking features.
Reasoning
With 0.6mm today, 1.3mm yesterday, and 0.9mm on Apr 9 — all following a wetter period including 4.2mm on Apr 3 and 3.9mm on Apr 4 — the rock has had zero consecutive fully dry days and internal moisture is very likely elevated across most boulders.
Strong SW winds (35 km/h today) and the SE/S aspect provide reasonable drying potential, but humidity averaging 78% over the last week and the lack of any sustained dry window mean evaporative drying has been repeatedly interrupted before completion.
Cumulative rainfall of 42.9mm over 28 days with several freeze-thaw cycles (multiple nights near or below 0°C) poses a moderate risk of grain loosening and hold breakage on this Millstone Grit, which is already susceptible to strength loss at low saturation levels.
Early April in Northumberland at 215m remains marginal — temperatures are modest (avg 7°C last 7 days), days are lengthening but solar intensity is still limited, and the spring rainfall pattern has been persistently unsettled.
Contributing Factors
8
Rain on Apr 9 (0.9mm), Apr 11 (1.3mm), and today Apr 12 (0.6mm) has prevented any sustained drying period from developing, keeping the rock in a repeatedly re-wetted state.
The rock has not had even one full dry day since April 10, far short of the minimum 24–48 hours needed after light rain on porous gritstone.
42.9mm over 28 days represents a persistently wet period that keeps background moisture levels elevated throughout the porous Millstone Grit.
Strong SW winds at 35 km/h are helpful for surface drying on the SE/S facing aspects, and will assist exposed boulders in shedding surface moisture.
The south-facing orientation catches good spring sunshine and promotes faster drying on exposed faces, though this benefit is limited by cloud cover and the short drying window.
Average humidity of 78% over the past week limits evaporative drying capacity, meaning even with wind the moisture removal rate is reduced.
Several recent nights have dropped near or below freezing while rock likely retains internal moisture, creating conditions for freeze-thaw damage above the critical 60% saturation threshold.
Average temperatures around 7–10°C are adequate for some drying but not warm enough to drive rapid evaporation from porous gritstone at 215m altitude.
Recommendations
3
- Wait for a sustained dry window of at least 48 hours with good wind and sun before visiting — the current pattern of intermittent rain has not allowed adequate drying.
- If you do visit, restrict yourself strictly to the most exposed south-facing boulders and perform a thorough touch-test on all holds before committing; abandon any problem where dampness is detected.
- Check the base of boulders — if the ground beneath is moist rather than sandy-dry, assume the rock still holds internal moisture and do not climb.
Do Not Climb
65%
2 days ago
Today has seen 2.1mm of rain, meaning the rock is currently wet and should not be climbed. The past two weeks have brought repeated light-to-moderate rain events (5.1mm in the last 7 days, 43.2mm over 28 days), and the forecast shows more rain tomorrow (4.7mm) — conditions are not suitable for climbing today and will not improve imminently.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's SE/S aspect and open moorland position mean the sun-facing main buttress dries faster than the scattered shady boulders — the April 6th condition report confirms north-facing problems like 'Gloom' stay damp long after south-facing ones like 'Arête Land' have dried.
- As Millstone Grit rather than Fell Sandstone, the coarser grain and different feldspar content may give slightly different capillary behaviour, but it remains highly porous and must be treated with the same conservative drying standards.
- At 215m on open moorland, overnight frost is still occurring (min temps below 0°C on multiple recent nights), creating freeze-thaw risk in any rock retaining internal moisture from the frequent rain events.
- The scattered boulder field means individual problems have very different microclimates — exposed wind-scoured boulders may dry adequately while sheltered or mossy ones remain damp for days longer.
Warnings
2
- Rain is falling today and more is forecast tomorrow — the rock is wet and climbing would risk permanent hold damage on this porous Millstone Grit.
- Overnight frost risk remains real at 215m in early April — do not climb if the rock has been wet and temperatures have dropped below freezing, as freeze-thaw weakening may have occurred.
Reasoning
Rain today (2.1mm) has wet the rock surface and will be penetrating the porous Millstone Grit; combined with 0.9mm on April 9th and repeated small events through early April, internal moisture levels are likely elevated.
Although the S-facing aspect and moderate southerly wind (29 km/h) will help surface drying, with rain falling today there has been zero effective drying time, and humidity at 71% with temperatures only 8°C limits evaporation rate.
Repeated wetting-drying and freeze-thaw cycles this spring (multiple nights below 0°C interspersed with rain) pose cumulative structural risk to holds, particularly on problems that have not fully dried internally between events.
Early April in Northumberland at 215m is still a transitional period with overnight frost risk, short effective drying windows, and elevated background moisture from the wet winter/spring — the 43mm over 28 days reflects this ongoing pattern.
Contributing Factors
7
2.1mm of precipitation today means the rock is actively wet with no drying time elapsed.
43.2mm over 28 days with rain on multiple days in the last week (April 1, 3, 4, 5, 9, and today) means the rock has had little opportunity to dry internally.
The south-facing aspect receives good spring solar radiation and will help surface drying once rain stops, as confirmed by condition reports showing south-facing boulders drying first.
Today's 29 km/h southerly wind and the generally windy forecast will assist evaporation from exposed surfaces once precipitation ceases.
Average temperature of only 6.4°C over the last week with a max of just 8.2°C today significantly slows evaporation and extends required drying time.
Multiple nights below 0°C in recent days (April 2, 4, 5, 6) combined with rain means freeze-thaw cycling may be causing cumulative damage to moisture-laden rock.
4.7mm forecast for April 12 will re-wet the rock before any meaningful drying from today's rain can occur.
Recommendations
3
- Do not climb today — rain has fallen and the rock is wet; wait for a sustained dry window before visiting.
- Monitor the forecast closely: April 14 may offer the start of a drying window if the 13th's rain is light, but the heavy rain forecast for April 15 (16.5mm) will reset conditions.
- When you do visit after a dry spell, test the ground at the crag base and focus on the most exposed south-facing boulders first — north-facing and sheltered problems will need significantly longer to dry.
Do Not Climb
45%
3 days ago
Despite a promising dry spell from April 6–8, recent rain on April 9 (0.9mm) and trace precipitation today, combined with high cumulative moisture from the past month (44mm), mean the rock has not had adequate drying time. The SE/S aspect and moderate wind help, but temperatures are cool and humidity remains elevated for reliable drying of Millstone Grit.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulders dry at very different rates — south-facing exposed blocks (e.g. Arête Land area) dry significantly faster than north-facing or shady ones (e.g. Gloom), as confirmed by the April 6 condition report.
- Millstone Grit's coarser grain structure with substantial feldspar content gives slightly different porosity from Fell Sandstone but remains highly susceptible to strength loss when wet — treat with the same caution.
- Open moorland setting at 215m means overnight temperatures are dropping near or below freezing (min -1.7°C on April 6, -0.6°C on April 5), creating freeze-thaw risk in any rock retaining internal moisture from the wet March–April period.
- The 44mm of rain over the past 28 days represents sustained saturation loading — even boulders that appear surface-dry may retain significant internal moisture, especially at their bases and on shaded faces.
Warnings
2
- The surface of south-facing boulders may appear dry while the interior remains saturated — do not be deceived by surface appearance on Millstone Grit.
- Freeze-thaw cycles have been active at this altitude through March and early April; holds may be weakened even on apparently dry rock after this winter.
Reasoning
The rock received 0.9mm rain on April 9 after only two full dry days (April 6–8), and 44mm over the past 28 days means the Millstone Grit has been repeatedly saturated with minimal opportunity for deep drying.
The SE/S aspect and moderate SW winds today (33.5 km/h) aid surface evaporation, but with only ~1 day since the last rain and humidity at 68%, surface drying may be occurring but internal moisture from repeated wetting events will persist.
Repeated wetting and near-freezing overnight temperatures (multiple nights below 0°C in recent weeks) increase the risk of freeze-thaw damage and grain loosening in porous Millstone Grit that has been saturated through much of March and early April.
Early spring at 215m altitude means cool temperatures (average 6.2°C over the past week), limited solar intensity, and frequent overnight frosts — all of which significantly slow internal drying of porous rock.
Contributing Factors
7
0.9mm fell on April 9 with only one day elapsed since, insufficient drying time for porous Millstone Grit even for a light shower.
44mm over 28 days with frequent wetting events means the rock has been repeatedly saturated with minimal opportunity for deep internal drying.
South-facing boulders receive good spring solar radiation which aids surface and near-surface drying, as confirmed by the April 6 condition report.
33.5 km/h SW winds today help move moist air from rock surfaces and accelerate evaporation.
Average temperature of only 6.2°C over the past week and humidity around 68–78% significantly slow the evaporation rate from porous rock.
Multiple overnight frosts in recent weeks (down to -2.0°C) combined with saturated rock create cumulative freeze-thaw damage risk at 215m.
4.5mm forecast for tomorrow (April 11) and further rain on April 12–13 will re-wet any surface drying achieved today.
Recommendations
3
- Do not climb today — the rock has had insufficient drying time since yesterday's rain and remains at risk of internal moisture from the prolonged wet period.
- If visiting, use the ground moisture test: if the soil at the base of boulders is damp rather than sandy-dry, the rock is almost certainly still wet internally.
- Wait for a sustained dry spell of at least 48–72 hours with temperatures above 10°C before attempting to climb; the forecast does not show such a window in the next 5 days.
Marginal — Assess Conditions
55%
5 days ago
South-facing and wind-exposed boulders are likely dry after three good drying days (April 6–8), but today's trace precipitation and high overnight humidity introduce uncertainty. North-facing and sheltered boulders will still be damp given the wet recent history (71.6mm in 28 days) and multiple rain events in the past week.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- The April 6 condition report confirms south-facing and wind-exposed boulders were already dry, while north-facing boulders like Gloom remained damp — expect this split to persist today.
- Rothley's scattered boulder layout means individual blocks dry at very different rates depending on their aspect, shelter, and moss coverage — assess each boulder individually.
- The open moorland setting provides decent wind exposure on the SE/S-facing main buttress, but smaller boulders tucked behind the crag or in hollows will hold moisture much longer.
- Millstone Grit's coarser grain structure may allow slightly faster surface drying than Fell Sandstone, but internal moisture retention remains a concern after 71.6mm of rain in the past 28 days.
Warnings
2
- North-facing and sheltered boulders are almost certainly still damp internally despite possible dry surfaces — do not climb these.
- Recent freeze-thaw cycles on moisture-laden rock may have weakened holds; test holds carefully and be alert for loose or fragile features.
Reasoning
The last significant rain was 2.1mm on April 5, with three essentially dry days since (April 6–8 totalling 0.0mm), but today (April 9) has seen 0.3mm of trace precipitation and the 28-day total of 71.6mm means background moisture levels remain elevated.
The SE/S aspect and warm temperatures on April 7–8 (up to 17.6°C) with moderate winds provided good drying conditions, and the April 6 condition report already confirmed south-facing boulders were dry — an additional two warm dry days should have consolidated this for sun-exposed rock.
With overnight lows near or just below freezing on several recent nights (April 2: -1.6°C, April 4: -2.0°C, April 5: -0.6°C, April 6: -1.7°C) and elevated internal moisture from weeks of wet weather, there is moderate freeze-thaw risk for recently saturated rock.
Early April conditions in Northumberland at 215m are marginal — improving daylight and occasional warm spells aid drying, but persistent humidity (80% average over the past week) and cool overnight temperatures slow the process significantly.
Contributing Factors
7
April 6–8 were dry with warm afternoon temperatures (up to 17.6°C on April 8) and moderate winds, providing good cumulative drying.
The April 6 report confirmed south-facing and wind-exposed boulders were already dry that evening, before two additional warm dry days.
Humidity rose to 91–94% overnight (April 8–9), likely causing surface re-wetting through condensation on cooler rock surfaces.
71.6mm over 28 days with multiple rain events (including 13.9mm on March 24 and scattered showers through early April) means deep internal moisture levels remain elevated.
0.3mm forecast today interrupts the drying sequence and may re-dampen surfaces, though the amount is very small.
Multiple overnight frosts in the past week (down to -2.0°C on April 4) while rock was still holding internal moisture creates cumulative freeze-thaw damage risk.
The crag's south-east to south aspect and partial wind exposure on open moorland maximise solar gain and air movement for drying.
Recommendations
3
- Focus on south-facing, wind-exposed boulders only — the main buttress and prominently positioned blocks are most likely to be dry; avoid north-facing problems like Gloom entirely.
- Perform a tactile test on each boulder before climbing: press your palm firmly against the rock surface and check for any coolness or dampness, and inspect the ground at the base for moisture.
- Be prepared to walk away from individual problems that feel cold or look dark — the scattered boulder layout means conditions will vary significantly from block to block.
Marginal — Assess Conditions
60%
6 days ago
South-facing and wind-exposed boulders are likely dry after two full dry days with warm temperatures and moderate wind, but north-facing and shaded boulders will still be damp. Today's trace precipitation (0.4mm) and high background moisture from a wet March mean on-site assessment is essential before climbing.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- A condition report from 2 days ago confirmed south-facing and wind-exposed boulders were dry while north-facing ones (e.g. Gloom) remained damp — expect the same split today.
- Rothley sits on open moorland with no tree shelter, which aids wind-driven drying on exposed faces but the scattered boulder layout means some blocks are naturally more sheltered than others.
- The prominent main buttress and larger boulders will have shaded north sides that retain moisture far longer than the sunny SE/S faces — treat each boulder individually.
- 74mm of rain in the last 28 days represents a very wet March for Millstone Grit at 215m altitude, meaning deep internal moisture levels remain elevated even where surfaces appear dry.
Warnings
2
- Do not climb on any north-facing or shaded boulders — these remain damp and climbing risks permanent hold damage on weakened Millstone Grit.
- Today's 0.4mm trace precipitation and 80% humidity may have re-moistened some surfaces that appeared dry yesterday — check carefully.
Reasoning
The rock received 2.1mm on April 5th and has had two full dry days (April 6–7) with warm peaks of 11.5–15.5°C, but today's 0.4mm trace and 80% humidity mean surface moisture is still a factor, particularly on shaded aspects.
The SE/S aspect has benefited from strong solar radiation over the last two days with moderate SW/SE winds (16–25 km/h), providing reasonable drying conditions for south-facing surfaces, though overnight humidity above 80% limits nocturnal drying.
With 74mm in the last 28 days and repeated wetting cycles, internal pore saturation in shaded or less-exposed boulders remains a concern for hold integrity on Millstone Grit, which weakens significantly at low moisture levels.
Early April at 215m altitude brings overnight temperatures near or slightly below freezing (min -1.7°C on April 6th), creating potential freeze-thaw stress on any rock retaining internal moisture from the persistently wet late-winter period.
Contributing Factors
8
2.1mm fell on April 5th and 0.4mm today (April 8th), keeping surface moisture topped up and resetting drying clocks on exposed surfaces.
April 6–7 were completely dry with peak temperatures of 11.5–15.5°C, providing strong drying conditions especially for the south-facing aspect.
74mm over 28 days and persistent humidity averaging 80% mean the rock's internal moisture content remains elevated despite surface drying.
The south and south-east facing aspect receives strong spring solar radiation, significantly accelerating surface and near-surface drying on favourable faces.
Open moorland setting with partial wind exposure and recent moderate winds (16–55 km/h) help move moist air from rock surfaces.
Overnight humidity consistently above 80–90% with overnight cloud cover limits nocturnal drying and can re-moisten rock surfaces through condensation.
Overnight lows near or below 0°C (−1.7°C on April 6th, −1.6°C on April 2nd) create freeze-thaw cycling risk on rock that still holds internal moisture.
The April 6th report confirms south-facing and wind-exposed boulders were dry, providing real-world validation that favourable faces have had adequate drying.
Recommendations
3
- Focus only on south-facing and wind-exposed boulders — the April 6th condition report confirms these were dry, and two more days of drying have followed.
- Avoid all north-facing and shaded boulders entirely; these were confirmed damp on April 6th and today's trace rain and high humidity will not have improved them.
- Perform a touch test on each boulder before climbing — if any dampness or coolness is felt on the surface, or if the ground at the base is moist, do not climb that problem.
Do Not Climb
45%
8 days ago
The last significant rain was only yesterday (2.1mm on April 5th, spread across several showers), with additional rain on April 3rd (4.2mm) and April 4th (3.9mm). Despite today being dry with moderate temperatures and lower humidity, only one full dry day is insufficient drying time for Millstone Grit after a persistently wet period — 73.7mm over the last 28 days with very few consecutive dry days.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulder field means individual blocks have varying exposure — sun-facing boulders on the prominent buttress will dry considerably faster than sheltered or north-facing scattered boulders behind the main crag.
- The SE/S aspect is favourable and the crag catches afternoon sun, but at 215m on open moorland the cool spring temperatures (average 5.7°C over the last week) significantly slow internal drying of the porous Millstone Grit.
- The Millstone Grit here has coarser grain structure than Fell Sandstone, which can allow slightly faster surface drainage but the substantial porosity still means internal moisture retention is a serious concern after prolonged wet weather.
- The moorland setting means the ground around the crag base is likely still saturated from the persistent March–April rainfall — if the ground is damp, the rock almost certainly retains internal moisture.
Warnings
2
- The surface of sun-facing rock may already appear dry today, but after 10mm of rain in the last 3 days and a deeply wet month, internal moisture is almost certainly still present — climbing risks permanent hold damage.
- Overnight temperatures near 0°C combined with saturated rock create active freeze-thaw conditions that weaken the Millstone Grit structure.
Reasoning
With 2.1mm falling yesterday (April 5th), 3.9mm on April 4th, and 4.2mm on April 3rd — totalling over 10mm in the last three days — the rock is very likely still holding significant internal moisture despite today's dry surface conditions.
Only one dry day has elapsed since the last rain; even with today's favourable SW wind (15 km/h), 74% humidity, and SE/S aspect catching spring sun, this is far short of the minimum 48–72 hours needed after the cumulative recent rainfall.
The persistent wet period (73.7mm in 28 days with rain on 6 of the last 7 days) means the Millstone Grit is likely deeply saturated, posing genuine risk of hold breakage and grain loosening even where the surface appears dry.
Early April at 215m brings overnight temperatures near or below freezing (0.1°C last night, -2.0°C on April 4th), creating freeze-thaw risk in saturated rock and further slowing the drying process during cool overnight hours.
Contributing Factors
8
2.1mm fell across scattered showers on April 5th, with the last precipitation at 18:00, giving less than 24 hours of drying.
73.7mm over 28 days with rain on 6 of the last 7 days means deep saturation of the porous Millstone Grit is highly likely.
A single dry day is far below the minimum 48-hour guideline for porous sandstone, let alone the 72+ hours advisable after heavy cumulative rainfall.
The SE/S facing aspect receives good spring sun which aids surface evaporation, though this can create the dangerous illusion of dry rock while the interior remains wet.
Humidity at 74% today is the lowest in several days and allows some evaporative drying, though not enough to compensate for the short drying window.
Overnight lows near 0°C (0.1°C last night, -2.0°C on April 4th) create freeze-thaw risk in saturated rock and halt drying overnight.
SW wind at 15 km/h provides some drying assistance, though much lighter than the strong winds earlier in the week.
Yesterday's 55 km/h westerly winds would have aided surface drying during dry spells between showers, but the late afternoon rain negated much of this benefit.
Recommendations
3
- Wait at least another full dry day — conditions on April 8th (after two warm, dry days forecast) would be a much more responsible time to visit.
- If you do visit today, check the ground at the base of the crag: if the moorland turf and soil are still damp, the rock will be too — do not climb.
- Focus any future session on the most exposed, sun-facing problems on the main buttress and avoid any sheltered, shaded, or low-lying boulders which will retain moisture much longer.
Do Not Climb
65%
8 days ago
Rain today (2mm) on top of a wet recent period (12.2mm in the last 7 days, 73.6mm in the last 28 days) means the rock is almost certainly damp internally despite the strong winds. The forecast shows a promising dry window from tomorrow, but the crag needs at least 48 hours of dry weather to begin approaching climbable conditions.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulders on open moorland mean individual blocks vary significantly in drying speed — smaller, exposed, sun-facing boulders dry much faster than the main buttress or any north-facing faces.
- The Millstone Grit here is coarser-grained than Fell Sandstone with substantial feldspar content, giving slightly different porosity — it can feel surface-dry while still retaining significant internal moisture.
- The SE/S aspect catches good sun through the middle of the day in spring, which is a significant advantage for drying the main faces, but March/April sun angles are still relatively low.
- The moorland setting at 215m means overnight frost is common (min temps around 0°C or below recently), and freeze-thaw cycling on saturated rock is a real concern for hold integrity at this time of year.
Warnings
2
- Do not climb today — rain is falling on already-saturated Millstone Grit and holds are at elevated risk of breakage.
- Freeze-thaw damage is an active concern with overnight temperatures near 0°C on saturated rock — even apparently solid holds may be compromised.
Reasoning
With 2mm of rain today, 4.2mm and 3.9mm on the 3rd and 4th April, plus a very wet March (73.6mm over 28 days), internal moisture levels in the Millstone Grit are likely high despite any surface drying.
Today's strong westerly winds (57 km/h) and low humidity (70%) will help surface evaporation, but with rain falling today and the SE/S aspect not directly facing the prevailing wind, meaningful internal drying has not yet begun from the most recent rainfall.
Repeated wetting with overnight temperatures oscillating around 0°C (min -2.0°C on 4th April, 0.5°C today) creates significant freeze-thaw risk on already-saturated Millstone Grit, increasing the danger of hold breakage.
Early April in Northumberland at 215m is still firmly in the transitional season — cool temperatures, frequent rain, and overnight frosts mean drying is slow and cumulative moisture from winter/early spring persists.
Contributing Factors
7
2mm today plus 4.2mm and 3.9mm on the 3rd and 4th means the rock has had no meaningful dry period to recover.
73.6mm over 28 days indicates deep, persistent saturation of the porous Millstone Grit that cannot be resolved by a single dry day.
56.9 km/h westerly winds will accelerate surface evaporation significantly, though internal drying lags well behind.
70% humidity is the lowest in the recent period and supports evaporation, though still not exceptionally low.
Overnight minima around or below 0°C combined with saturated rock create active freeze-thaw conditions that weaken holds and damage the crag.
The south-facing aspect receives reasonable spring sunshine which aids drying, particularly on the main buttress faces.
Cool average temperatures over the last week significantly slow evaporation rates from porous sandstone.
Recommendations
3
- Wait at least 48 hours from today's rain before visiting — the earliest realistic window is April 7th, and even then conditions should be carefully assessed on arrival.
- If visiting during the upcoming dry window, test the base of the crag and underside of boulders for dampness before climbing — if these areas are moist, the rock is still too wet internally.
- Prioritise small, isolated, sun-facing boulders which will dry fastest; avoid the main buttress base and any north-facing or shaded problems.
Do Not Climb
70%
9 days ago
Rain today (3.5mm) and yesterday (4.2mm) on top of a wet recent period means Rothley Crag's Millstone Grit will not have had adequate drying time. Despite strong winds today, the rock is almost certainly still damp internally and should not be climbed.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulders on open moorland mean individual blocks vary significantly in drainage and exposure — some south-facing prominent boulders dry far faster than low-lying or sheltered ones.
- Millstone Grit's coarser grain structure and substantial feldspar content can give a deceptively dry surface appearance while internal moisture persists, making visual assessment unreliable shortly after rain.
- The open moorland setting at 215m means the base ground can remain boggy for days after wet spells — if the peat/grass at the crag base is wet, the rock certainly is too.
- The SE-S aspect catches good sun from mid-morning onward, which is a significant advantage, but March/April sun angles are still relatively low and solar drying is limited compared to summer.
Warnings
2
- Overnight freezing temperatures on saturated Millstone Grit create active freeze-thaw damage risk — climbing now risks permanent structural harm to holds.
- The surface may feel dry in wind-exposed areas while the interior remains dangerously weak — do not trust surface appearance alone after this wet period.
Reasoning
With 3.5mm falling today, 4.2mm yesterday, and 5.7mm on March 29th — totalling 15.5mm in the last seven days — the rock is certainly holding significant internal moisture despite any surface drying between showers.
Strong SW winds (45 km/h today) and the SE-S aspect will assist surface evaporation, but with zero consecutive dry days and repeated wetting events, meaningful through-drying of porous Millstone Grit has not been possible.
The repeated wetting cycle through March and into April means the rock has been near or above the critical saturation threshold for extended periods, raising the risk of grain loosening and hold breakage if climbed.
Early April at 215m elevation with overnight temperatures dropping below 0°C (today's min was -0.7°C) means freeze-thaw cycling is an active concern on saturated rock, compounding structural vulnerability.
Contributing Factors
6
3.5mm today and 4.2mm yesterday ensure the rock is freshly wet with zero consecutive dry days.
71.2mm over the last 28 days with frequent rain events means the rock has had no opportunity to fully dry out at depth.
Sustained 45 km/h SW winds today will accelerate surface evaporation, though insufficient time has elapsed for meaningful through-drying.
The south-facing aspect maximises available spring sunshine, which helps surface drying when the sun is out.
Overnight lows of -0.7°C today and -1.6°C on April 2nd on recently saturated rock at 215m create active freeze-thaw damage potential.
Average humidity of 82% over the past week significantly slows evaporative drying despite wind.
Recommendations
3
- Wait for at least 48 hours of completely dry weather with temperatures above 5°C before considering a visit.
- Check the moorland ground at the base of the crag — if the peat and grass are damp, the rock is certainly still wet internally.
- If visiting later in the forecast window (April 7–8), focus on the most prominent south-facing boulders and perform thorough visual and touch checks before climbing.
Do Not Climb
55%
10 days ago
Today saw 2.7mm of rain on top of a persistently wet March (69.4mm in 28 days), and the rock has had zero consecutive dry days. While the SE/S aspect and moderate wind help, the combination of today's rain, high seasonal moisture loading, and cool temperatures means the Millstone Grit is very likely still holding internal moisture.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Rothley's scattered boulders on open moorland mean individual blocks vary significantly in exposure — some sheltered boulders will retain moisture far longer than prominent sun-facing faces on the main buttress.
- The Millstone Grit here has coarser grain structure than Fell Sandstone, which can allow slightly faster surface drainage but still absorbs water readily through its porous matrix.
- At 215m on open moorland, the crag is exposed to persistent SW/W winds which aid drying, but the altitude also brings cooler temperatures and more frequent frost cycles in early spring.
- The March condition report noted that even after several sunny days, north-facing and shady boulders were still wet — with the continued wet pattern since then, expect similar variation across the venue today.
Warnings
2
- Do not climb today — rain fell today and the Millstone Grit will be wet; climbing risks permanent hold damage and personal injury.
- Be aware of potential freeze-thaw damage from the recent frost cycles; test holds carefully even when rock appears dry, particularly on edges and flakes.
Reasoning
With 2.7mm of rain today, 1.8mm on April 1st, and 5.7mm on March 29th — all on top of a very wet March totalling nearly 70mm — the rock is almost certainly holding significant internal moisture despite any surface drying between showers.
The SE/S aspect and moderate-to-strong SW/W winds have provided reasonable drying opportunities, but the repeated wetting cycle (rain every 2–3 days throughout March) has never allowed the 48–72+ hours of continuous dry weather needed to properly dry the grit after heavier events.
With frequent wetting–drying and several overnight frost events (min temps below 0°C on multiple occasions), freeze-thaw cycling poses a real concern for saturated Millstone Grit, increasing the risk of hold breakage and surface granulation.
Early April in Northumberland at 215m is still firmly in the transitional season — overnight frosts remain possible, days are lengthening but solar intensity is moderate, and the wet winter legacy means background moisture levels in porous rock remain elevated.
Contributing Factors
6
2.7mm fell today with no consecutive dry days, and the past week has seen 10.8mm across multiple events, preventing any sustained drying window.
69.4mm over 28 days with rain falling in frequent pulses means the rock has been repeatedly re-saturated without adequate drying intervals.
The south-facing aspect catches good spring sun and the exposed moorland setting with moderate wind (averaging 25–30 km/h from the west/SW) significantly aids surface evaporation.
Average temperature of 5.7°C over the past week with overnight minima near or below freezing slows drying and introduces freeze-thaw cycling risk on saturated rock.
Average humidity of 81% over the past week limits evaporative drying capacity, meaning even wind-assisted drying is slower than it would be in drier air.
Open moorland can remain boggy and wet at ground level, and scattered boulders sitting in or near saturated peat will wick moisture from below.
Recommendations
3
- Wait for the forecast dry window from April 5–7 (low humidity, moderate wind, no rain) before visiting — this offers the best chance of adequately dried rock in the coming days.
- If visiting during the dry window, test conditions carefully: check the base of the main buttress and shaded undersides of boulders for dampness before climbing.
- Avoid any problems on north-facing or sheltered boulders, as these will take significantly longer to dry given the persistent moisture loading this spring.
Climbing Outlook