Clwydian Range and Berwyns
Monday 31 August 2026 · The Berwyns and northeast Wales
Why: A low thunderstorm risk remains difficult to time precisely.
Showers or rain at times. A noticeable westerly breeze, with cloud coming and going on the tops.
High-ground wind (600 m)
Westerly around 15 mph at 600 m. Gusts reaching around 25 mph at 600 m, with locally higher values possible on the most exposed tops. Strongest early (around 15 mph), easing toward 10 mph later.
Walking impact
Noticeable on exposed ground, but unlikely to impede most walking.
Thunderstorms
Thunderstorms are possible from early morning into around midday. Keep an escape route from exposed ridges and descend if thunder develops.
Ground conditions
The ground is likely to be wet after recent rain.
Spate risk
There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. The heaviest rain is expected early in the day. Crossing risk is expected from around 00:00 until around 14:00. Turn back if a crossing looks unsafe.
Rain and showers
Showers or spells of rain at times. The heaviest rain is expected early in the day.
Cloud-free summits
Around 40%. Around 35% early, improving to around 50% later.
Cloud and visibility
Cloud bases mostly around 700-1000 m. Bases should tend to lift as the day goes on. Cloud bases are likely to remain high, but some forecast models are much cloudier, so more extensive summit cloud remains a credible outcome. Cloud is likely to come and go on the higher summits; breaks may be useful but not dependable.
Temperature and wind chill
Around 10°C at 600 m, feeling like 6°C in the wind.
Freezing level
Above the summits.
Daylight
Sunrise 06:21 — Sunset 20:06 — about 13.7 hours daylight.
Overnight · 6 p.m.–9 a.m.Wild campingBetaThunder risk is around 29% in parts of the area; avoid exposed pitches if storms develop. 68/100Mixed · 600 m View detailsHide details
Full regional overnight outlook
Across representative hills, open-hillside camping looks reasonable around 600 m (68/100). Some overnight rain is likely, so expect a damp pitch or pack-up.
Elevation reference (open ground)
- Wind / gust
- 8 / 18 mph
- Coldest
- 10.9°C
- In cloud
- Unlikely
- Condensation
- Low
- Wind / gust
- 9 / 22 mph
- Coldest
- 10.6°C
- In cloud
- 25% of night
- Condensation
- Low
Open-hillside guidance across representative hills. Local shelter, ridges, tent design and the exact pitch can change conditions substantially. Read about sleeping-bag comfort ratings, pitching in strong winds or using the wild-camping forecast.
Daytime · exposed rockClimbing & scramblingBetaThunder risk is around 29% in parts of the area; exposed scrambling may be a poor choice. 29/100Poor · Poor View detailsHide details
Full regional climbing & scrambling outlook
Conditions for exposed scrambling across the area look poor (29/100). Rain is likely to leave rock wet; polished slabs, vegetation and drainage lines may be notably worse. Mapped summit-point geology across the representative hills includes slate or mudstone and volcanic rock; moisture response can therefore vary substantially between crags and routes.
Representative summit-point samples across the region; individual crags and routes may differ.
Generic exposed hands-on-rock terrain across representative summits; mapped summit-point geology is a broad regional sample, not a named-route survey. Contains British Geological Survey materials © UKRI 2026. How to use the climbing and scrambling forecast.
Updated 30 August 2026 at 04:40 UTC. See typical weekly and monthly conditions for Clwydian Range and Berwyns.