Climbing Forecast › Snowdonia — Moelwynion › Carreg Alltrem

SNOWDONIA — MOELWYNION · RHYOLITE

Carreg Alltrem weather & climbing conditions

Good — dry and climbable

Right now

Temp7°C
Wind3 km/h
Gusts4 km/h
Humidity89.2%
Rain 48hdry
Last rainNone recent

Assessment

No recent rain
High humidity (89.2%) — rhyolite friction compromised, particularly for bouldering

7-day forecast

Scroll through each day — hourly detail is shown inline.

Today Saturday 31 October
Good
Temp5°C
Raindry
Wind3 km/h
Gusts4 km/h
Humidity89%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
09:00 — dry — — null%
17:00 7° dry 3 — 89.2%
18:00 6° dry 3 — 93.8%
19:00 5° dry 2 — 96.6%
20:00 5° dry 3 — 99.3%
21:00 4° dry 3 — 100%
Sun Sunday 1 November
Good
Temp9°C
Raindry
Wind14 km/h
Gusts—
Humidity84%
No recent rain
  • Good temperature for mountain rhyolite
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 4 — 96.2%
07:00 6° dry 6 — 97.3%
08:00 7° dry 11 — 98.6%
09:00 8° dry 14 — 97.6%
10:00 9° dry 15 — 98%
11:00 9° dry 16 — 94.1%
12:00 9° dry 16 — 84.6%
13:00 10° dry 15 — 75.8%
14:00 9° dry 14 — 71.9%
15:00 9° dry 13 — 76.6%
16:00 7° dry 10 — 85%
17:00 6° dry 9 — 94.2%
18:00 6° dry 9 — 95.4%
19:00 7° dry 9 — 94.8%
20:00 7° dry 10 — 96.4%
21:00 7° dry 12 — 98.4%
Mon Monday 2 November
Good
Temp8°C
Raindry
Wind15 km/h
Gusts—
Humidity78%
No recent rain
  • Good temperature for mountain rhyolite
Time °C Rain Wind (km/h) Gust Hum
06:00 4° dry 11 — 95.4%
07:00 4° dry 12 — 95.6%
08:00 4° dry 13 — 96.6%
09:00 6° dry 14 — 93.2%
10:00 7° dry 16 — 87.2%
11:00 8° dry 17 — 80.1%
12:00 8° dry 17 — 75.8%
13:00 9° dry 16 — 73.2%
14:00 9° dry 15 — 72.7%
15:00 8° dry 14 — 75.2%
16:00 7° dry 12 — 82.5%
17:00 5° dry 10 — 92.9%
18:00 5° dry 9 — 94.5%
19:00 5° dry 9 — 95.1%
20:00 5° dry 10 — 95.9%
21:00 5° dry 10 — 96.1%
Tue Tuesday 3 November
Good
Temp9°C
Rain0.1mm
Wind19 km/h
Gusts—
Humidity89%
No recent rain
  • Good temperature for mountain rhyolite
  • Damp mountain air — upper pitches may stay greasy
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 14 — 98%
12:00 9° dry 19 — 89.2%
18:00 7° dry 18 — 92%
Wed Wednesday 4 November
Good
Temp9°C
Raindry
Wind24 km/h
Gusts—
Humidity77%
No recent rain
  • Good temperature for mountain rhyolite
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 5° dry 15 — 89.6%
12:00 9° dry 24 — 77.3%
18:00 6° dry 21 — 79.7%
Thu Thursday 5 November
Good
Temp7°C
Raindry
Wind25 km/h
Gusts—
Humidity72%
No recent rain
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 4° dry 21 — 90.9%
12:00 7° dry 25 — 72.4%
18:00 6° dry 19 — 81.2%
Fri Friday 6 November
Good
Temp8°C
Raindry
Wind22 km/h
Gusts—
Humidity83%
No recent rain
  • Good temperature for mountain rhyolite
  • Breezy — helps drying
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 20 — 95.2%
12:00 8° dry 22 — 82.6%
18:00 7° dry 17 — 92.1%
Sat Saturday 7 November
Good
Temp7°C
Raindry
Wind15 km/h
Gusts—
Humidity78%
No recent rain
Time °C Rain Wind (km/h) Gust Hum
06:00 6° dry 15 — 97.6%
12:00 7° dry 15 — 77.7%
18:00 5° dry 8 — 91.7%

About Carreg Alltrem

A hidden gem tucked into the Lledr Valley between Blaenau Ffestiniog and Dolwyddelan — regularly listed among the top VS venues in North Wales. Volcanic rock, quick-drying, with a clean south-facing wall of steep grooves and crack lines up to 180ft (55m). Short walk from a layby on the Dolwyddelan road. Because it's off the main Ogwen/Llanberis routes it stays quiet even at peak season, making it a great choice on busy weekends.

Region
Snowdonia — Moelwynion
Rock type
Rhyolite
Aspect
south-facing
Altitude
200m
Exposure
medium
Seepage
low