Right now

Temp7°C

Wind30 km/h

Gusts36 km/h

Humidity100%

Rain 48hdry

Last rainNone recent

Assessment

0.4mm rain forecast

Windy — 33 km/h, gusts 43 km/h

Humidity 99% — likely fog/cloud

High humidity (100%) — rhyolite friction compromised, particularly for bouldering

Windy — 30 km/h, gusts 36 km/h. Take care on exposed routes

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Wednesday 16 September

Poor

Temp7°C

Rain0.4mm

Wind33 km/h

Gusts43 km/h

Humidity99%

0.4mm rain forecastWindy — 33 km/h, gusts 43 km/hHumidity 99% — likely fog/cloud

Damp mountain air — upper pitches may stay greasy
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

12:00 7° dry 30 36 100%

15:00 7° dry 36 43 97.47%

18:00 6° 0.2mm 48 56 99.58%

21:00 6° 0.1mm 52 63 99.44%

Thu Thursday 17 September

Poor

Temp5°C

Rain4mm

Wind47 km/h

Gusts59 km/h

Humidity89%

3.6mm rain forecastWind 47 km/h, gusts 59 km/h — too windyHumidity 89% — potential fog

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 7° dry 48 59 97.06%

09:00 5° dry 44 54 92.78%

12:00 5° dry 48 59 88.22%

15:00 6° 0.5mm 46 57 89.46%

18:00 6° 0.2mm 47 58 88.4%

21:00 6° dry 47 59 90.09%

Fri Friday 18 September

Poor

Temp6°C

Rain9mm

Wind64 km/h

Gusts90 km/h

Humidity97%

8.8mm rain forecastWind 64 km/h, gusts 90 km/h — too windyHumidity 97% — likely fog/cloud

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 5° dry 37 47 98%

09:00 5° dry 44 57 93.91%

12:00 6° 0.6mm 61 81 95.92%

15:00 7° 5mm 68 90 97.98%

18:00 8° 2mm 61 84 98.77%

21:00 9° 1mm 53 77 98.76%

Sat Saturday 19 September

Poor

Temp9°C

Rain9mm

Wind46 km/h

Gusts73 km/h

Humidity93%

9.3mm rain forecastWind 46 km/h, gusts 73 km/h — too windyHumidity 93% — 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° 1mm 51 74 98%

09:00 8° 1mm 50 75 96.76%

12:00 9° 2mm 47 73 92.79%

15:00 9° 1mm 45 70 92.28%

18:00 8° 0.9mm 43 63 94.39%

21:00 7° dry 41 59 94.36%

Sun Sunday 20 September

Poor

Temp7°C

Rain0.3mm

Wind29 km/h

Gusts48 km/h

Humidity81%

0.3mm rain forecastWindy — 29 km/h, gusts 48 km/h

Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 5° dry 35 49 94.23%

09:00 5° dry 31 49 87.76%

12:00 7° dry 29 48 80.41%

15:00 8° dry 29 47 80.63%

18:00 7° dry 30 42 90.28%

21:00 7° 0.3mm 32 43 95.94%

Mon Monday 21 September

Poor

Temp10°C

Rain3mm

Wind31 km/h

Gusts47 km/h

Humidity95%

3.3mm rain forecastWindy — 31 km/h, gusts 47 km/hHumidity 95% — likely fog/cloud

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 8° 0.5mm 36 48 98.48%

09:00 9° 0.5mm 32 47 97.37%

12:00 10° 0.5mm 31 47 94.64%

15:00 10° 0.4mm 31 46 94.45%

18:00 10° 0.4mm 31 42 97.53%

21:00 9° 0.3mm 30 40 98.42%

Tue Tuesday 22 September

Poor

Temp9°C

Rain4mm

Wind23 km/h

Gusts39 km/h

Humidity91%

3.5mm rain forecastHumidity 91% — 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 8° 0.6mm 30 42 98.23%

09:00 9° 0.6mm 29 42 96.18%

12:00 9° 0.7mm 25 39 92.02%

15:00 9° 0.6mm 21 33 89.44%

18:00 8° 0.3mm 21 28 93.8%

21:00 7° dry 21 28 96.41%

Wed Wednesday 23 September

Caution

Temp8°C

Raindry

Wind22 km/h

Gusts36 km/h

Humidity82%

Drying — 18h since rain

Good temperature for mountain rhyolite
Breezy — helps drying

Time °C Rain Wind (km/h) Gust Hum

06:00 5° dry 22 27 97.25%

09:00 6° dry 21 31 89.02%

12:00 8° dry 22 36 81.96%

About Y Lliwedd

The birthplace of British rock climbing — the Victorian pioneers cut their teeth on Y Lliwedd's vast north face before moving on to the greater ranges. The highest cliff in England and Wales sits on the eastern arm of the Snowdon Horseshoe above Llyn Llydaw. A serious mountain venue with a reputation for tricky route-finding, sparse protection and being hopelessly slippery when wet — needs a proper dry spell and settled forecast. Historic classics run from Slanting Buttress Ridge Route (D) through the wandering Avalanche / Red Wall / Longland's Continuation (S) — a grandiose Severe — to The Sword (VS) and Terminator (E1). Approach by the Miner's Track from Pen-y-Pass in around 90 minutes.

Region: North Wales — Snowdon
Rock type: Rhyolite
Aspect: north-facing
Altitude: 750m
Exposure: high
Seepage: high

Other crags in this region

Clogwyn Du'r Arddu (Cloggy)