Climbing Forecast › Snowdonia — Carneddau › Craig yr Ysfa

SNOWDONIA — CARNEDDAU · RHYOLITE

Craig yr Ysfa climbing conditions

Poor — wet, too windy or closed

Right now

Temp13°C
Wind22.7 km/h
Gusts27 km/h
Humidity98.8%
Rain 48h0mm
Last rainNone recent

Assessment

1.5mm rain forecast
Humidity 97% — likely fog/cloud
Breezy — good for drying

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Friday 14 August
Poor
Temp13°C
Rain1.5mm
Wind18 km/h
Gusts25 km/h
Humidity97%
1.5mm rain forecastHumidity 97% — likely fog/cloud
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
Time °C Rain Wind Gust Hum
06:00 13° 0mm 23 27 98.8%
09:00 13° 0mm 18 23 98.65%
12:00 13° 0.96mm 19 25 97.98%
15:00 12° 0.53mm 17 23 96.39%
18:00 11° 0mm 27 34 90.05%
21:00 9° 0mm 28 37 95.68%
Sat Saturday 15 August
Poor
Temp8°C
Rain0.3mm
Wind20 km/h
Gusts30 km/h
Humidity80%
0.3mm rain forecast
  • Good temperature for mountain rhyolite
Time °C Rain Wind Gust Hum
06:00 7° 0.17mm 29 37 98.39%
09:00 7° 0.08mm 26 36 95.31%
12:00 8° 0mm 20 29 83.95%
15:00 8° 0mm 20 30 77%
18:00 7° 0mm 21 30 80.18%
21:00 7° 0mm 26 33 90.4%
Sun Sunday 16 August
Good
Temp10°C
Rain0mm
Wind13 km/h
Gusts28 km/h
Humidity70%
Should be dry
  • Good temperature for mountain rhyolite
Time °C Rain Wind Gust Hum
06:00 5° 0mm 15 19 94.33%
09:00 7° 0mm 10 20 81.61%
12:00 9° 0mm 11 25 69.76%
15:00 10° 0mm 14 28 70.66%
18:00 10° 0mm 12 22 74.36%
21:00 9° 0mm 15 20 91.88%
Mon Monday 17 August
Poor
Temp11°C
Rain1.1mm
Wind25 km/h
Gusts41 km/h
Humidity84%
1.1mm rain forecastWindy — 25 km/h, gusts 41 km/h
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 8° 0mm 21 29 95.53%
09:00 9° 0mm 22 35 89.59%
12:00 11° 0.19mm 24 39 84.5%
15:00 11° 0.35mm 26 41 83.6%
18:00 11° 0mm 31 47 89.64%
21:00 10° 0.6mm 41 57 97.07%
Tue Tuesday 18 August
Poor
Temp10°C
Rain8.8mm
Wind36 km/h
Gusts56 km/h
Humidity89%
8.8mm rain forecastWindy — 36 km/h, gusts 56 km/hHumidity 89% — 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 Gust Hum
06:00 10° 1.25mm 40 57 97.97%
09:00 10° 1.36mm 38 56 96.12%
12:00 10° 1.32mm 36 56 91.29%
15:00 10° 1.01mm 36 55 86.64%
18:00 10° 0.79mm 36 52 86.27%
21:00 9° 0.71mm 37 49 93.94%
Wed Wednesday 19 August
Poor
Temp8°C
Rain2.9mm
Wind32 km/h
Gusts52 km/h
Humidity75%
2.9mm rain forecastWindy — 32 km/h, gusts 52 km/h
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 6° 0.43mm 34 47 95.21%
09:00 7° 0.55mm 33 50 88.89%
12:00 8° 0.58mm 32 52 76.47%
15:00 9° 0mm 32 52 72.54%
18:00 8° 0.35mm 32 47 79.09%
21:00 7° 0mm 33 44 92.19%
Thu Thursday 20 August
Poor
Temp8°C
Rain4mm
Wind28 km/h
Gusts47 km/h
Humidity77%
4mm rain forecastWindy — 28 km/h, gusts 47 km/h
  • Good temperature for mountain rhyolite
  • Wet rhyolite is slippery; seepage from grass above can linger
  • Breezy — helps drying
Time °C Rain Wind Gust Hum
06:00 5° 0.46mm 32 43 96.16%
09:00 6° 0.57mm 30 46 86.6%
12:00 8° 0.93mm 28 47 77.84%
15:00 8° 0.83mm 27 45 76.65%
18:00 8° 0.55mm 26 40 80.11%
21:00 7° 0mm 26 35 92.08%
Fri Friday 21 August
Caution
Temp5°C
Rain0mm
Wind24 km/h
Gusts—
Humidity—
Should be dryHigh seepage — may still be weeping
  • Breezy — helps drying
Craig yr Ysfa is a vast, remote mountain amphitheatre hidden in the wild heart of the Carneddau, composed of rugged volcanic rock. The cliff provides long, atmospheric multi-pitch traditional routes on rough, featured rock, though deep gullies and shaded corners seep heavily late into summer. Facing east at an elevation above 700 metres, the crag receives morning sun before descending into cold mountain shade. The grade spectrum ranges from classic VDiff mountain scrambles to technical E-grades, dominated by the legendary Amphitheatre Buttress. The approach requires a long, strenuous ninety-minute mountain trek from the A5 via Ffynnon Llugwy. Extreme mountain exposure, remote isolation, and complex descents demand thorough preparation and mountain navigation skills.

About Craig yr Ysfa

Craig yr Ysfa is a vast, remote mountain amphitheatre hidden in the wild heart of the Carneddau, composed of rugged volcanic rock. The cliff provides long, atmospheric multi-pitch traditional routes on rough, featured rock, though deep gullies and shaded corners seep heavily late into summer. Facing east at an elevation above 700 metres, the crag receives morning sun before descending into cold mountain shade. The grade spectrum ranges from classic VDiff mountain scrambles to technical E-grades, dominated by the legendary Amphitheatre Buttress. The approach requires a long, strenuous ninety-minute mountain trek from the A5 via Ffynnon Llugwy. Extreme mountain exposure, remote isolation, and complex descents demand thorough preparation and mountain navigation skills.

Region
Snowdonia — Carneddau
Rock type
rhyolite
Aspect
east-facing
Altitude
700m
Exposure
high
Seepage
high