Condition Analysis
AI-powered assessment using site data and 14-day weather history
Porth Ysgo's non-porous gabbro is effectively dry after an extended period of negligible rainfall — only 0.3mm today and 0.3mm total over the past week. The exposed, SW-facing aspect and strong winds will have cleared any trace moisture rapidly; conditions are excellent for climbing today and tomorrow.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal venue: some of the best boulders are only accessible around low tide, so check tide times for the Lleyn Peninsula before setting out.
- The gabbro's exceptionally rough texture destroys skin quickly — bring tape and plan for shorter sessions, especially in humid conditions when skin softens faster.
- Coastal salt spray and high humidity (89% today) can leave a thin moisture film on holds even without rain; a quick wipe or brush may be needed on lower boulders near the waterline.
- The approach involves a steep descent to the beach — allow extra time and be aware that the path can be slippery after rain.
Warnings
2
- Semi-tidal access: do not get caught by an incoming tide on lower boulders — always know the tide schedule.
- Significant rainfall (22.8mm) forecast for August 18th may bring Atlantic groundswell affecting access and safety on lower problems.
Reasoning
Only 0.3mm of precipitation fell today, and the preceding 6 days were completely dry; non-porous gabbro will not retain any meaningful surface moisture from such trace amounts.
Exposed site with consistent winds (17–30 km/h) and a SW aspect receiving strong summer solar radiation mean any surface moisture from today's 0.3mm will evaporate within an hour or two.
Gabbro is extremely hard, dense, and non-porous — there is zero risk of structural weakening or hold breakage from moisture.
Mid-summer conditions with long daylight hours and warm temperatures (18–24°C recently) provide optimal drying and comfortable climbing conditions.
Contributing Factors
6
Only 5.0mm of rain in the last 28 days, with just 0.3mm today — an exceptionally dry period for coastal Wales.
Gabbro does not absorb water, so surface moisture from trace rain evaporates very quickly without any structural concern.
Consistent winds of 17–30 km/h and a SW-facing aspect maximise solar drying, clearing surface moisture within minutes to hours.
Today's 89% humidity and coastal salt spray may leave a thin moisture film on lower holds, slightly reducing friction despite the rock being structurally dry.
22.8mm forecast for August 18th will temporarily saturate the surface and may bring swell that restricts access to tidal boulders.
Long daylight hours and warm temperatures provide excellent drying capacity and comfortable climbing conditions.
Recommendations
3
- Check tide times before visiting — some boulders are only accessible 2–3 hours either side of low tide.
- Bring finger tape and plan for shorter sessions; the gabbro's abrasive texture will shred skin quickly, especially in humid conditions.
- If targeting August 17th or later, monitor the forecast closely as significant rain (22.8mm) is expected on the 18th — plan to climb on the 15th or 16th for the best window.
Previous Analyses
Likely Safe to Climb
90%
2 days ago
Porth Ysgo's gabbro is thoroughly dry after 8 consecutive rain-free days, and today is completely dry with warm temperatures and light winds — excellent conditions for bouldering. The non-porous gabbro will be in superb condition through the afternoon; humidity rises significantly in the evening so an earlier session is preferable.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal venue: some of the best boulders are only accessible around low tide, so check tide times before heading down the steep approach path.
- The gabbro is exceptionally abrasive — skin will wear rapidly in warm humid conditions, so bring finger tape and plan session length accordingly.
- The approach involves a steep descent to the beach; allow extra time and be aware that the path can be slippery after rain or heavy dew.
- Coastal humidity and sea-spray can create a thin moisture film on lower boulders near the waterline even on dry days, so test friction before committing to harder moves.
Warnings
2
- Humidity rises above 90% after 8pm tonight with potential condensation forming on rock surfaces — avoid late evening sessions.
- Rain is forecast from tomorrow onwards, with a very heavy event (30mm) on August 17th that may bring high winds and dangerous sea conditions.
Reasoning
Eight consecutive dry days with only trace precipitation (0.2mm on Aug 5) before that means the non-porous gabbro surface is completely dry.
The SW aspect receives strong afternoon solar radiation and the exposed coastal position ensures good airflow; any residual surface moisture from sea-spray or overnight dew evaporates rapidly in these conditions.
Gabbro is extremely hard, dense, and non-porous — there is zero risk of structural weakening or hold breakage from moisture.
Mid-summer provides long daylight hours and adequate warmth for comfortable bouldering, though humidity is moderate at 76–79% which may slightly affect skin friction in the afternoon.
Contributing Factors
6
Eight consecutive dry days have ensured the gabbro surfaces are completely free of any residual moisture.
Gabbro does not absorb water and dries extremely quickly, making it resilient to brief showers and spray.
The south-westerly aspect receives strong afternoon sun, promoting rapid evaporation of any surface moisture.
Humidity around 72–79% during the day is typical for a coastal venue and not problematic for gabbro's excellent friction, though it may affect skin grip.
Humidity rises sharply above 90% after 8pm with potential condensation, making late sessions less ideal for friction.
Winds of 10–13 km/h from the SW are gentle enough for comfortable climbing while still providing some airflow to keep rock dry.
Recommendations
3
- Climb during the morning-to-mid-afternoon window (roughly 9am–4pm) when humidity is lowest and sun is on the face for best friction.
- Check tide times before setting out — some of the best boulders are only accessible around low water.
- Bring finger tape and manage session length carefully; the gabbro's abrasive texture will shred skin quickly in warm, humid conditions.
Likely Safe to Climb
93%
3 days ago
Porth Ysgo's gabbro is completely dry after 7 consecutive rain-free days, with today seeing warm temperatures up to 30°C and low humidity — excellent conditions for bouldering. The non-porous gabbro will be in superb condition; the main concern is skin management on the abrasive rock in the heat.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal venue: some of the best boulders sit low on the beach and are only accessible around low tide — check tide tables before committing to the walk in.
- The SW-facing aspect means the rock bakes in afternoon sun; today's near-30°C temperatures will make the gabbro uncomfortably hot to touch in direct sun — earlier sessions or evening light may be more pleasant.
- Landings at Porth Ysgo are notoriously poor (uneven rocks, pebbles, sand); bring multiple pads and ideally a spotter even on moderate problems.
- The gabbro's extreme roughness will shred skin rapidly, especially in warm dry conditions — tape up early and manage session length to preserve skin for subsequent days.
Warnings
2
- Semi-tidal access: some boulders will be submerged or cut off at high tide — verify low tide window before committing.
- Poor landings throughout the venue require multiple crash pads and attentive spotting.
Reasoning
Seven consecutive dry days with only trace rainfall (0.2mm on Aug 5) before that mean the non-porous gabbro is completely dry, with no residual moisture on surfaces or in cracks.
The SW aspect, exposed coastal position, and persistent winds (16–29 km/h over recent days) have ensured rapid evaporation of any sea-spray or condensation; today's drop to 60% humidity and warm temperatures confirm thorough drying.
Gabbro is extremely hard, dense, and non-porous — there is zero risk of structural weakening from moisture, and the prolonged dry spell poses no freeze-thaw concern in August.
Mid-summer conditions with long daylight hours and warm temperatures are ideal; the only seasonal consideration is the heat making the rock hot to touch and increasing skin wear.
Contributing Factors
5
Seven consecutive dry days with negligible prior rainfall (total 4.7mm in 28 days) means the rock is thoroughly dry.
Gabbro does not absorb water, so even light rain events dry off within hours on an exposed coastal site.
Today reaches nearly 30°C with humidity dropping to 38%, providing excellent friction conditions on the rough gabbro.
Consistent wind exposure throughout the week has kept surfaces free of lingering moisture and sea-spray films.
The extreme heat combined with gabbro's abrasive texture will accelerate skin wear, limiting usable climbing time.
Recommendations
3
- Climb today with confidence — conditions are excellent; consider an afternoon or evening session to avoid the hottest midday sun on SW-facing rock.
- Tape fingers and vulnerable skin early in the session to extend climbing time on the abrasive gabbro.
- Check tide tables before heading down — some boulders are only accessible around low water, and the walk-in is long enough that poor timing wastes significant effort.
Likely Safe to Climb
92%
5 days ago
Porth Ysgo's non-porous gabbro is thoroughly dry after 5 consecutive rain-free days, with only trace precipitation (0.2mm) on Aug 5 before that. The SW-facing, wind-exposed aspect and summer conditions make for excellent climbing today and through most of the coming week.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal access means some of the best boulders are only reachable around low water — check tide tables for Aberdaron/Porth Ysgo before setting out.
- The gabbro's exceptionally rough texture will shred skin rapidly in warm, dry conditions like these — tape up early and consider shorter sessions.
- The steep walk-in down to the beach is committing; allow time for the return and don't get caught by an incoming tide on lower boulders.
- Coastal humidity (recently 80%+ average) can leave a thin moisture film on shaded surfaces early morning — the afternoon clearing today offers the best friction window.
Warnings
2
- Do not linger on lower tidal boulders as the tide turns — some platforms become inaccessible quickly.
- Monitor Atlantic swell forecasts; large groundswell can make lower boulders unsafe even on calm, dry days.
Reasoning
The rock has been rain-free for 5 full days since a trivial 0.2mm on Aug 5, and the non-porous gabbro would have dried within an hour or two of that trace event.
Persistent moderate winds (17–28 km/h) from varying directions combined with the exposed SW aspect ensure any residual surface moisture evaporates rapidly on this zero-porosity rock.
Gabbro is extremely hard and dense with no water absorption — there is zero risk of structural weakening or hold breakage from moisture.
Peak summer provides long daylight hours and adequate warmth for comfortable sessions, though temperatures are moderate (17–19°C) rather than hot, which is ideal for skin preservation on this abrasive rock.
Contributing Factors
6
Five consecutive dry days following only trace precipitation (0.2mm on Aug 5) ensure the rock surface is completely dry.
Gabbro does not absorb water and dries within minutes to hours, eliminating any concern about internal moisture.
Consistent winds of 17–25 km/h accelerate surface drying and disperse any coastal humidity.
Average humidity over the past week has been around 80%, which can leave a thin film on shaded surfaces early in the day, but the afternoon drop to 64% and wind exposure mitigate this.
The south-westerly aspect receives strong afternoon sun, warming the rock and ensuring rapid evaporation of any condensation.
Some boulders require low tide access — this is a logistical constraint rather than a conditions issue, but climbers must plan around it.
Recommendations
3
- Check Aberdaron tide tables and plan your session around low water to access all boulders.
- Bring plenty of finger tape — the gabbro will destroy skin quickly in these dry, warm conditions.
- Afternoon offers the best friction window today as humidity drops to the mid-60s and the SW aspect catches full sun.
Likely Safe to Climb
92%
5 days ago
Porth Ysgo's non-porous gabbro is fully dry after four consecutive rain-free days following only trace precipitation, with no rain forecast ahead. Despite elevated coastal humidity today, the exposed aspect and wind ensure surface moisture is not a concern on this rock type.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal venue: some of the best boulders are only accessible around low tide, so check tide tables for the Lleyn Peninsula before heading down.
- The gabbro's extreme roughness will shred skin quickly — bring finger tape and plan shorter sessions, especially in humid conditions when sweat compounds the abrasion.
- The approach down to the beach is steep and can be slippery when wet or muddy; recent elevated humidity may keep the path greasy despite dry rock below.
- Coastal salt spray and sea mist can deposit a thin moisture film on lower boulders even on dry days — wipe holds before committing to harder problems.
Warnings
1
- Today's humidity is 89% — if sea mist rolls in, lower boulders may develop a condensation film; test friction on easier problems first.
Reasoning
The last meaningful rain was 3.3mm on August 4th, five days ago, with only a trace 0.2mm on August 5th — non-porous gabbro would have dried within an hour of that stopping.
Four fully dry days with consistent 17–28 km/h winds and a SW-facing exposed coastal aspect have ensured complete surface drying; the rock will be bone dry.
Gabbro is an extremely hard, dense igneous rock with zero porosity — there is no risk of structural weakening or hold breakage from moisture.
Mid-summer provides long daylight hours and reasonable temperatures (~18°C); humidity is elevated today at 89% but drops to 70–75% from tomorrow, offering excellent conditions.
Contributing Factors
6
Four consecutive dry days following only trace precipitation, with the last significant rain (3.3mm) five days ago — more than sufficient for non-porous gabbro.
Gabbro does not absorb water and dries within minutes to hours of rain ceasing, eliminating structural damage concerns entirely.
Today's 89% humidity may cause a slight moisture film from condensation, but the exposed wind and rough gabbro texture maintain adequate friction.
Winds of 17–32 km/h over recent days accelerate surface evaporation on this fully exposed coastal venue.
The south-westerly aspect receives strong afternoon sun in summer, further assisting drying and warming the rock surface.
Some boulders require low tide access — this doesn't affect rock condition but is essential for session planning.
Recommendations
3
- Check Lleyn Peninsula tide tables before visiting — plan your session around low tide to access the full range of problems.
- Bring finger tape and expect rapid skin wear on the exceptionally rough gabbro; shorter, focused sessions will be more productive.
- Wipe holds on lower sea-level boulders before climbing, as salt spray can leave a slippery residue even on otherwise dry days.
Likely Safe to Climb
92%
6 days ago
Porth Ysgo gabbro is in excellent condition — the non-porous rock has had three fully dry days since the last trivial rainfall (0.2mm on Aug 5), and the most significant rain (3.3mm on Aug 4) is now four days past with consistent wind exposure aiding rapid drying. Conditions are ideal for a session today, though the rough gabbro will punish skin quickly in the humid coastal air.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal venue: some of the best boulders are only accessible around low tide, so check tide times for the Lleyn Peninsula before committing to the walk in.
- The SW aspect means the crag catches afternoon and evening sun, which combined with today's SW winds will keep surface moisture minimal.
- Gabbro's exceptionally rough texture shreds skin rapidly — tape up early and consider shorter sessions, especially in humid conditions when skin softens faster.
- The approach involves a steep descent to the beach; poor landings on most problems mean multiple bouldering pads are essential.
Reasoning
Non-porous gabbro sheds water almost immediately, and with three consecutive dry days since the last trace rainfall (0.2mm), the rock surface will be completely dry.
The SW aspect receives good solar radiation through the afternoon, and consistent 15–28 km/h winds across an exposed coastal site ensure any residual surface moisture evaporates within hours.
Gabbro is extremely hard and dense with zero porosity — there is no risk of structural weakening or hold breakage from moisture.
Mid-summer conditions with daylight until late evening provide long climbing windows; temperatures around 18–19°C are comfortable, though elevated coastal humidity (80%) will soften skin faster than usual.
Contributing Factors
5
Only 4.0mm of rain in the past seven days, spread across three trace events, with the most significant (3.3mm) now four days ago — more than sufficient drying time for non-porous gabbro.
Gabbro does not absorb water and dries within hours of rainfall, eliminating any concern about internal dampness.
Consistent winds of 15–32 km/h over recent days accelerate surface drying across the exposed boulders.
Humidity around 80% today may create a thin moisture film and will soften skin faster, but is not enough to compromise friction on gabbro's extremely rough texture.
Some boulders are only accessible at low tide, which is an access issue rather than a condition issue but must be planned for.
Recommendations
3
- Check Lleyn Peninsula tide times before setting out — plan your session around the low-tide window for full access to all boulders.
- Tape fingers and hands early; the abrasive gabbro combined with humid coastal air will wear skin very quickly.
- Bring multiple bouldering pads as landings are generally poor across the venue.
Likely Safe to Climb
92%
7 days ago
Porth Ysgo's non-porous gabbro is in excellent condition after two fully dry days following only trace rainfall (0.2mm on Aug 5), with no significant rain forecast for the coming week. The rock will be completely dry and the exceptionally rough gabbro texture will provide superb friction.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal access: some boulders are only reachable around low tide, so check tide tables for the Lleyn Peninsula before heading down.
- The gabbro is notoriously skin-shredding — bring finger tape and consider shorter sessions, especially in humid conditions when sweat softens skin faster.
- The approach involves a steep descent to the beach; poor landings on most problems mean multiple bouldering pads are essential.
- Coastal humidity has been elevated (76–95% recently) which may leave a thin moisture film on north-facing or shaded surfaces early in the day, but the SW aspect and exposed wind will clear this quickly.
Reasoning
The last meaningful rain was 3.3mm on Aug 4, followed by a trace 0.2mm on Aug 5, with two fully dry days since — non-porous gabbro will be completely dry.
The SW aspect, exposed coastal wind (24–28 km/h recently), and zero porosity mean even the Aug 4 rain would have dried within hours; two subsequent dry days confirm fully dry rock.
Gabbro is extremely hard and dense with zero porosity — there is no risk of structural weakening or hold breakage from moisture.
Mid-summer conditions with adequate daylight hours and reasonable temperatures (17–20°C) are ideal for gabbro bouldering, though skin management becomes the limiting factor in longer sessions.
Contributing Factors
6
Only 4.7mm of rain in the past 28 days with most of that being trace amounts, ensuring thoroughly dry rock.
Gabbro does not absorb water and dries extremely quickly, so even the 3.3mm on Aug 4 would have cleared within hours.
The south-westerly aspect and exposed coastal position maximise solar drying and wind exposure, accelerating surface moisture clearance.
Humidity has been 71–95% recently, which can leave a thin moisture film on shaded surfaces early in the day, but this dissipates quickly on non-porous rock.
Zero precipitation is forecast for the next five days, ensuring sustained dry conditions.
Some problems are only accessible around low tide, requiring advance planning regardless of weather conditions.
Recommendations
3
- Check Lleyn Peninsula tide tables before visiting — plan your session around low water to access the full range of boulders.
- Bring finger tape and consider limiting session length, as the abrasive gabbro will rapidly destroy skin, especially in humid conditions.
- Carry multiple bouldering pads as landings are generally poor across the venue.
Likely Safe to Climb
92%
9 days ago
Porth Ysgo's non-porous gabbro is dry and ready to climb. The last meaningful rain was 3.3mm on August 4th, but gabbro sheds surface water almost immediately, and the exposed, windy site has had over a day of dry, breezy conditions since — more than sufficient for this rock type.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- Semi-tidal venue: check tide times before heading down, as several of the best boulders are only accessible around low water.
- The gabbro is notoriously abrasive — bring finger tape and expect rapid skin wear, especially in a long session; consider shorter sessions or rest days between visits.
- Coastal humidity (currently ~74%) can leave a thin moisture film on rock overnight and in early morning; the afternoon window (14:00–17:00) today looks driest with humidity dropping to ~61%.
- Landings are poor on uneven beach terrain — bring multiple bouldering pads and a spotter for the higher problems.
Warnings
1
- Semi-tidal access: do not get caught out by a rising tide — know your exit route and the tide schedule before committing to lower boulders.
Reasoning
The last significant rainfall was 3.3mm on August 4th, with only a trace (0.2mm) on August 5th and a fully dry day today; non-porous gabbro will have shed all surface water within an hour or two of rain stopping.
Persistent westerly winds of 22–28 km/h over the last two days on this exposed coastal site, combined with SW aspect solar heating, mean any residual surface moisture has long since evaporated.
Gabbro is extremely hard and dense with zero porosity — there is no risk of structural weakening, hold breakage, or water-related damage.
Mid-summer conditions are favourable with long daylight hours and reasonable temperatures around 17–18°C; coastal humidity is moderate but not problematic for non-porous rock.
Contributing Factors
5
Only 3.3mm fell on Aug 4th with traces since, and today is completely dry — trivial amounts for non-porous gabbro.
Gabbro does not absorb water and dries within minutes to hours of rain ceasing, making it one of the most weather-resilient rock types.
Consistent winds of 18–32 km/h over recent days rapidly strip surface moisture from the rock.
Humidity around 74–76% is typical for a coastal Welsh summer and may cause slight early-morning dampness, but afternoon conditions look excellent.
Cloud cover drops to 38–52% in the afternoon, allowing solar drying on the SW-facing rock during the best climbing window.
Recommendations
3
- Aim for an afternoon session (14:00–17:00) when humidity drops to ~61% and cloud breaks allow sun on the SW-facing rock.
- Check tide times before descending — some boulders are only accessible around low water.
- Bring finger tape and multiple bouldering pads; the gabbro is exceptionally rough and the beach landings are uneven.
Marginal — Assess Conditions
65%
11 days ago
Today has seen significant rain (8.3mm) with showers continuing into the early afternoon, leaving the rock wet and humidity near 100%. However, gabbro is non-porous and dries rapidly — with strong winds forecast from mid-afternoon and rain ceasing by ~15:00, a late-afternoon window may be possible if surfaces are visually dry, though very high humidity will slow evaporation of surface moisture.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- The gabbro at Porth Ysgo is non-porous and sheds water quickly, but today's prolonged rain and near-100% humidity mean surface films and pooling in textured holds will linger longer than usual.
- Semi-tidal access means some boulders will be unavailable regardless of drying — check tide tables for today and the coming days before committing to the walk-in.
- The SW aspect faces into the prevailing wind today (S shifting W), which aids surface drying but also means sea spray could re-wet lower boulders in swell conditions.
- The extremely rough gabbro texture traps small pockets of water in its grain, and while friction remains surprisingly good when damp, greasy patches on sloping holds can catch climbers out.
Warnings
2
- Today's rock surfaces are currently wet and slippery — do not climb until rain has fully ceased and exposed faces have had time to dry.
- Gabbro's extreme roughness will shred damp skin even faster than dry skin — tape up and manage session length carefully.
Reasoning
Rain fell through most of the morning (total ~8.3mm today) with humidity at or near 100% until mid-afternoon; the rock surface is currently wet.
Gabbro's zero porosity means only surface water needs to evaporate — strong winds (25–28 km/h) from 15:00 onward and slightly dropping humidity should dry exposed faces within 1–2 hours of the last rain, though sheltered and north-facing surfaces will take longer.
No structural risk — gabbro does not absorb water and is not weakened when wet; the only concern is surface slipperiness.
Mid-summer provides long daylight hours and reasonable temperatures (~18°C), giving a potential late-afternoon/evening climbing window if rain stops as forecast.
Contributing Factors
6
8.3mm of rain spread across the morning and early afternoon has left all rock surfaces wet with standing moisture in textured holds.
Gabbro does not absorb water at all, so only surface moisture needs to evaporate, enabling rapid drying once rain stops.
Winds of 25–28 km/h from the S/SW are forecast through the afternoon and evening, which will strip surface moisture quickly from exposed faces.
Humidity remains above 90% through most of the day, slowing evaporation despite the wind and keeping a thin moisture film on the rock longer than usual.
The forecast shows zero precipitation from Aug 5–8 with strong westerly winds and dropping humidity, promising excellent conditions within 24 hours.
Some of the best boulders are only accessible around low tide — climbers must plan sessions around tide times regardless of weather.
Recommendations
3
- If visiting today, wait until late afternoon (after 16:00) and visually check that rock surfaces are dry before climbing — run a hand across holds to feel for moisture films.
- Tomorrow (Aug 5) looks far more promising with strong drying winds and no rain; consider postponing if possible for confident dry conditions.
- Check tide tables before heading down — some boulders are only accessible 2–3 hours either side of low tide, and plan your session window accordingly.
Marginal — Assess Conditions
72%
12 days ago
Gabbro is non-porous and dries extremely fast, so the light overnight drizzle (0.1mm at 01:00) will have cleared quickly — the rock should be dry through the morning and early afternoon window before light showers return around 16:00–17:00. However, high coastal humidity and incoming rain later today and tomorrow warrant a visual check on arrival.
Based on weather conditions only — does not cover bird nesting restrictions or other access issues.
- The semi-tidal nature of Porth Ysgo means some of the best boulders are only accessible around low water — check tide times before committing to the walk-in.
- Gabbro's extreme roughness shreds skin rapidly, especially in humid coastal conditions when skin is softer; tape up early and bring plenty of spare tape.
- Salt spray and sea-level humidity can leave a thin moisture film on holds even without rain — always touch-test key holds before pulling on.
- The SW aspect means afternoon sun heats the rock well during summer, but today's cloud cover from 13:00 onward will limit solar drying ahead of the evening showers.
Warnings
2
- Light showers are forecast from 16:00 onward today — retreat before then and be prepared for slippery conditions if caught out.
- Tomorrow (Aug 4) brings 3.7mm of rain with 94% humidity; do not assume conditions will carry over from today.
Reasoning
Only 0.1mm fell overnight at 01:00, and the non-porous gabbro surface will have dried within an hour or two given moderate easterly winds; the rock should be dry now and through the midday window.
The SW-facing, exposed coastal position with 15–19 km/h winds and clearing skies from 07:00–12:00 provides excellent drying conditions for a non-porous rock type, easily clearing any residual surface moisture from overnight.
Gabbro is extremely hard and non-porous — there is zero risk of structural weakening or hold breakage from moisture.
Mid-summer conditions are generally favourable, though the recent pattern of high humidity (80% average over 7 days) and an unsettled frontal system arriving tomorrow mean the dry window today is limited.
Contributing Factors
6
Gabbro does not absorb water and dries extremely quickly, so the trivial overnight precipitation poses no structural or deep-moisture concern.
Clear skies forecast from 07:00–12:00 with moderate winds and dropping humidity create an excellent climbing window before afternoon cloud and showers.
Scattered light rain is forecast from 16:00–17:00 and heavier at 21:00, limiting the afternoon session and wetting the rock again by evening.
Average humidity over the past week is 80%, and today's humidity remains above 60% even in the dry window, which can leave a thin moisture film on coastal rock.
Exposed coastal position with 15–19 km/h winds through the morning accelerates surface drying on the non-porous rock.
3.7mm forecast tomorrow (Aug 4) with 94% humidity, followed by further showers on Aug 5, 7, and 8, means conditions will deteriorate after today's window.
Recommendations
3
- Climb during the morning-to-early-afternoon window (roughly 08:00–15:00) before showers arrive; touch-test holds on arrival to confirm dryness.
- Check tide times carefully — plan your session around low water if you want access to the tidal boulders.
- Bring plenty of finger tape and manage skin carefully; the abrasive gabbro is especially punishing when humidity softens skin.
Climbing Outlook