Climbing Forecast › Snowdonia — Carneddau › Ysgolion Duon (Black Ladders)

SNOWDONIA — CARNEDDAU · RHYOLITE

Ysgolion Duon (Black Ladders) weather & climbing conditions

Caution — drying out or marginal

Right now

Temp6°C
Wind16 km/h
Gusts19 km/h
Humidity86.56%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain
Humidity 87% — potential fog
High humidity (86.56%) — rhyolite friction compromised, particularly for bouldering
Humidity 86.56% — potential fog/cloud, rock may be damp from condensation

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Saturday 31 October
Caution
Temp6°C
Raindry
Wind16 km/h
Gusts19 km/h
Humidity87%
No recent rainHumidity 87% — potential fog
  • Damp mountain air — upper pitches may stay greasy
Time °C Rain Wind (km/h) Gust Hum
15:00 6° dry 16 19 86.56%
18:00 6° dry 12 16 83.51%
21:00 5° dry 13 17 86.75%
Sun Sunday 1 November
Poor
Temp3°C
Rain1mm
Wind27 km/h
Gusts35 km/h
Humidity98%
1.1mm rain forecastWindy — 27 km/h, gusts 35 km/hHumidity 98% — likely fog/cloud
  • Cold mountain conditions — pack warm belay layers
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 4° 0.7mm 26 34 99.95%
09:00 4° 0.3mm 30 38 99.48%
12:00 4° dry 26 35 98.11%
15:00 3° dry 27 35 97.88%
18:00 3° dry 28 35 99.22%
21:00 3° dry 27 36 97.37%
Mon Monday 2 November
Caution
Temp2°C
Raindry
Wind33 km/h
Gusts47 km/h
Humidity89%
Should be dryWindy — 33 km/h, gusts 47 km/hHumidity 89% — potential fog
  • Cold mountain conditions — pack warm belay layers
  • Damp mountain air — upper pitches may stay greasy
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 0° dry 35 45 96.4%
09:00 0° dry 37 47 95.76%
12:00 1° dry 32 45 89.71%
15:00 2° dry 34 47 89.26%
18:00 1° dry 32 44 94.46%
21:00 0° dry 35 48 93.7%
Tue Tuesday 3 November
Caution
Temp2°C
Raindry
Wind36 km/h
Gusts55 km/h
Humidity89%
Should be dryWindy — 36 km/h, gusts 55 km/hHumidity 89% — potential fog
  • Cold mountain conditions — pack warm belay layers
  • Damp mountain air — upper pitches may stay greasy
  • Very windy — consider sheltered alternatives
Time °C Rain Wind (km/h) Gust Hum
06:00 0° dry 36 49 97.4%
09:00 1° dry 38 53 95.2%
12:00 2° dry 36 55 89.39%
15:00 2° dry 36 53 89.52%
18:00 2° dry 39 54 92.71%
21:00 1° dry 41 57 92.64%
Wed Wednesday 4 November
Poor
Temp2°C
Raindry
Wind42 km/h
Gusts64 km/h
Humidity86%
Should be dryWind 42 km/h, gusts 64 km/h — too windyHumidity 86% — potential fog
  • Cold mountain conditions — pack warm belay layers
  • Damp mountain air — upper pitches may stay greasy
  • Very windy — consider sheltered alternatives
Time °C Rain Wind (km/h) Gust Hum
06:00 0° dry 42 58 95.19%
09:00 0° dry 45 63 93.12%
12:00 2° dry 42 64 87.79%
15:00 2° dry 42 61 83.77%
18:00 2° dry 46 65 87.9%
21:00 1° dry 51 69 89.88%
Thu Thursday 5 November
Poor
Temp2°C
Raindry
Wind41 km/h
Gusts64 km/h
Humidity85%
Should be dryWind 41 km/h, gusts 64 km/h — too windyHumidity 85% — potential fog
  • Cold mountain conditions — pack warm belay layers
  • Very windy — consider sheltered alternatives
Time °C Rain Wind (km/h) Gust Hum
06:00 0° dry 48 65 94.13%
09:00 0° dry 49 69 91.31%
12:00 1° dry 43 64 85.18%
15:00 2° dry 40 58 85.1%
18:00 1° dry 41 56 90.23%
21:00 1° dry 41 56 91.81%
Fri Friday 6 November
Caution
Temp1°C
Raindry
Wind26 km/h
Gusts42 km/h
Humidity90%
Should be dryWindy — 26 km/h, gusts 42 km/hHumidity 90% — potential fog
  • Cold mountain conditions — pack warm belay layers
  • Damp mountain air — upper pitches may stay greasy
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 0° dry 31 43 95.6%
09:00 0° dry 31 44 93.34%
12:00 1° dry 28 42 89.7%
15:00 1° dry 24 36 90.63%
18:00 1° dry 24 32 94.93%
21:00 0° dry 23 30 96.39%
Sat Saturday 7 November
Caution
Temp1°C
Raindry
Wind18 km/h
Gusts31 km/h
Humidity90%
Should be dryHumidity 90% — potential fog
  • Cold mountain conditions — pack warm belay layers
  • Damp mountain air — upper pitches may stay greasy
Time °C Rain Wind (km/h) Gust Hum
06:00 -1° dry 19 25 97.9%
09:00 0° dry 20 28 96.07%
12:00 1° dry 19 31 90.5%
15:00 2° dry 17 26 90%

About Ysgolion Duon (Black Ladders)

The 'Black Ladders' — a huge, brooding amphitheatre on the north side of Carnedd Dafydd deep in the Carneddau wilderness. Primarily a winter climbing venue with a very Scottish feel: mixed pitches of water ice, bare rock chimneys and frozen turf, sometimes all in a single pitch. Routes up to 250m and 10 pitches. In summer, the north aspect and heavy seepage keep the rock damp — most summer trad here is a serious undertaking rather than a fun day out. Remote: ~90 minute walk-in from any direction, longer than most other Snowdonia venues. Full mountain kit and navigation are essential; conditions turn quickly at 750m.

Region
Snowdonia — Carneddau
Rock type
Rhyolite
Aspect
north-facing
Altitude
750m
Exposure
high
Seepage
very-high

Other crags in this region

Craig yr YsfaLlech Ddu (Black Slab)