Right now

Temp9°C

Wind47 km/h

Gusts57 km/h

Humidity96.05%

Rain 48h3mm

Last rain1h ago

Assessment

2.9mm rain forecast

Wind 73 km/h, gusts 94 km/h — too windy

Good friction temperature range for rhyolite

High humidity (96.05%) — rhyolite friction compromised, particularly for bouldering

Drying Time

10% dry · 10-21h to dry

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Sunday 6 September

Poor

Temp12°C

Rain3mm

Wind73 km/h

Gusts94 km/h

Humidity80%

2.9mm rain forecastWind 73 km/h, gusts 94 km/h — too windy

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 9° 2mm 47 57 96.05%

09:00 10° 0.6mm 67 81 87.8%

12:00 11° dry 77 94 81.4%

15:00 13° dry 68 87 78.89%

18:00 12° dry 59 73 93.78%

21:00 12° 0.5mm 57 70 99.57%

Mon Monday 7 September

Poor

Temp8°C

Rain7mm

Wind45 km/h

Gusts68 km/h

Humidity85%

7.1mm rain forecastWind 45 km/h, gusts 68 km/h — too windyHumidity 85% — potential fog

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 8° 0.2mm 34 42 97.89%

09:00 7° dry 33 44 96.16%

12:00 8° dry 40 55 84.69%

15:00 8° dry 50 68 85.86%

18:00 8° 1mm 60 77 95.98%

21:00 7° 3mm 55 70 96.79%

Tue Tuesday 8 September

Poor

Temp6°C

Rain24mm

Wind41 km/h

Gusts66 km/h

Humidity80%

23.5mm rain forecastWind 41 km/h, gusts 66 km/h — too windy

Wet rhyolite is slippery; seepage from grass above can linger
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 4° dry 44 60 95.17%

09:00 5° 0.5mm 40 62 91.35%

12:00 6° 0.5mm 41 66 80.29%

15:00 7° 0.5mm 41 64 79.16%

18:00 6° 0.6mm 41 60 87.92%

21:00 6° 0.5mm 43 61 92.7%

Wed Wednesday 9 September

Poor

Temp6°C

Rain0.7mm

Wind25 km/h

Gusts44 km/h

Humidity79%

0.7mm rain forecastWindy — 25 km/h, gusts 44 km/h

Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 4° dry 36 50 95.69%

09:00 5° 0.3mm 28 45 91.5%

12:00 6° 0.3mm 26 44 81%

15:00 7° dry 25 42 76.89%

18:00 6° dry 22 32 85.26%

21:00 5° dry 24 32 92.04%

Thu Thursday 10 September

Poor

Temp9°C

Rain7mm

Wind41 km/h

Gusts66 km/h

Humidity92%

7.1mm rain forecastWind 41 km/h, gusts 66 km/h — too windyHumidity 92% — potential fog

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Very windy — consider sheltered alternatives

Time °C Rain Wind (km/h) Gust Hum

06:00 6° 0.8mm 36 49 96.6%

09:00 7° 1mm 42 62 93.94%

12:00 8° 1mm 44 66 91.91%

15:00 9° 2mm 38 58 92.56%

18:00 9° 1mm 40 57 95.38%

21:00 9° 1mm 40 55 96.73%

Fri Friday 11 September

Poor

Temp8°C

Rain5mm

Wind29 km/h

Gusts48 km/h

Humidity87%

5.4mm rain forecastWindy — 29 km/h, gusts 48 km/hHumidity 87% — potential fog

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 7° 1mm 37 50 96.95%

09:00 7° 0.9mm 33 50 94.72%

12:00 8° 0.8mm 30 48 87.7%

15:00 8° dry 27 44 85.46%

18:00 8° dry 26 37 89.3%

21:00 7° dry 26 34 95.1%

Sat Saturday 12 September

Poor

Temp8°C

Rain5mm

Wind31 km/h

Gusts49 km/h

Humidity88%

4.8mm rain forecastWindy — 31 km/h, gusts 49 km/hHumidity 88% — potential fog

Good temperature for mountain rhyolite
Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 6° dry 31 41 96.46%

09:00 6° 1mm 31 45 92.35%

12:00 8° 0.9mm 31 49 87.68%

15:00 9° 1mm 32 49 87.36%

18:00 8° 0.8mm 30 44 91.42%

21:00 8° 1.0mm 28 39 96.1%

Sun Sunday 13 September

Poor

Temp7°C

Rain0.6mm

Wind26 km/h

Gusts—

Humidity—

0.6mm rain forecastWindy — 26 km/h, gusts null km/h

Wet rhyolite is slippery; seepage from grass above can linger
Breezy — helps drying

About Dinas Cromlech

Iconic open-book corner crag — home of Cenotaph Corner, Cemetery Gates, Left Wall. North-facing — cold and slow to dry; don't arrive in April expecting dry rock. Best in summer after a settled spell.

Region: North Wales — Llanberis Pass
Rock type: Rhyolite
Aspect: north-facing
Altitude: 480m
Exposure: high
Seepage: medium

Other crags in this region

Carreg Wastad Dinas Mot