Climbing Forecast › Snowdonia — Llanberis › Dinorwic Slate Quarry (Twll Mawr)

SNOWDONIA — LLANBERIS · SLATE

Dinorwic Slate Quarry (Twll Mawr) weather & climbing conditions

Good — dry and climbable

Right now

Temp13°C
Wind10 km/h
Gusts17 km/h
Humidity73.85%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain
Good friction temperature range for slate

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Saturday 31 October
Good
Temp13°C
Raindry
Wind10 km/h
Gusts17 km/h
Humidity74%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
15:00 13° dry 10 17 73.85%
18:00 11° dry 6 9 85.44%
21:00 10° dry 3 5 86.17%
Sun Sunday 1 November
Good
Temp11°C
Rain0.2mm
Wind14 km/h
Gusts28 km/h
Humidity80%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 10° 0.1mm 8 21 95.64%
09:00 11° dry 11 25 87.89%
12:00 11° dry 15 28 78.38%
15:00 11° dry 13 26 81.85%
18:00 10° dry 7 17 92.07%
21:00 10° dry 6 14 89.18%
Mon Monday 2 November
Good
Temp10°C
Raindry
Wind14 km/h
Gusts26 km/h
Humidity72%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 6 15 85.57%
09:00 7° dry 8 19 83.24%
12:00 9° dry 14 26 70.72%
15:00 10° dry 14 26 72.52%
18:00 9° dry 12 21 84.32%
21:00 8° dry 13 22 82.93%
Tue Tuesday 3 November
Good
Temp10°C
Raindry
Wind20 km/h
Gusts35 km/h
Humidity78%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 7° dry 13 21 90.59%
09:00 8° dry 14 24 86.66%
12:00 10° dry 20 35 77.54%
15:00 11° dry 19 33 77.76%
18:00 10° dry 16 27 83.26%
21:00 9° dry 16 26 82.96%
Wed Wednesday 4 November
Good
Temp10°C
Raindry
Wind20 km/h
Gusts34 km/h
Humidity75%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 7° dry 14 23 90.56%
09:00 8° dry 15 25 86.3%
12:00 9° dry 20 34 75.81%
15:00 11° dry 19 33 74.15%
18:00 10° dry 16 28 79.65%
21:00 8° dry 15 25 81.01%
Thu Thursday 5 November
Good
Temp10°C
Raindry
Wind17 km/h
Gusts30 km/h
Humidity74%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 13 21 90.62%
09:00 7° dry 14 24 85.89%
12:00 9° dry 18 30 74.23%
15:00 10° dry 16 27 74.53%
18:00 9° dry 13 21 83.92%
21:00 8° dry 12 20 85.17%
Fri Friday 6 November
Good
Temp9°C
Raindry
Wind12 km/h
Gusts21 km/h
Humidity80%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 11 17 91.57%
09:00 7° dry 11 18 87.84%
12:00 8° dry 12 21 78.79%
15:00 9° dry 11 19 80.22%
18:00 8° dry 9 15 87.99%
21:00 7° dry 9 13 90.75%
Sat Saturday 7 November
Good
Temp9°C
Raindry
Wind10 km/h
Gusts19 km/h
Humidity81%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 8 13 92.86%
09:00 7° dry 9 15 89.05%
12:00 9° dry 10 19 80.03%
15:00 10° dry 10 17 81.04%

About Dinorwic Slate Quarry (Twll Mawr)

The 'Big Hole' — the deepest of the Dinorwic slate workings and home to the biggest and hardest lines on Welsh slate. Twll Mawr is a huge, atmospheric quarry pit; its main climbing is on the north-facing south wall. Steve McClure made the first single-day ascent of all pitches in 2011. Sheltered inside the pit — winds don't reach — and the compact slate stays dry. Thirty minutes' walk up the inclines from the National Slate Museum.

Region
Snowdonia — Llanberis
Rock type
Slate
Aspect
north-facing
Altitude
380m
Exposure
low
Seepage
low

Other crags in this region

Dinorwic Slate Quarry (Australia Quarry)Dinorwic Slate Quarry (California & Bus Stop)Dinorwic Slate Quarry (Rainbow Slab)Dinorwic Slate Quarry (Serengeti & Never Never Land)Dinorwic Slate Quarry (Vivian)