Clwydian Range and Berwyns
Saturday 29 August 2026 · The Berwyns and northeast Wales
Why: Thunderstorm timing is inherently uncertain and may shift by several hours.
Persistent rain is the main concern. A noticeable southeasterly breeze, with cloud coming and going on the tops.
High-ground wind (600 m)
Southeasterly 10-15 mph at 600 m. Gusts reaching around 20 mph at 600 m, with locally higher values possible on the most exposed tops. Strongest early (around 10 mph), easing toward 5 mph later.
Walking impact
Noticeable on exposed ground, but unlikely to impede most walking.
Spate risk
There could be a spate risk based on forecast rainfall. Burns and unbridged crossings may rise quickly. The heaviest rain is expected around the middle of the day. Crossing risk is expected from around 09:00 until around 23:00. Turn back if a crossing looks unsafe.
Rain and showers
Persistent rain for much of the day. The heaviest rain is expected around the middle of the day.
Cloud-free summits
Around 45%. Around 40% early, improving to around 50% later.
Cloud and visibility
Cloud bases mostly around 400-600 m. Summit breaks should become more frequent later. Cloud is likely to come and go on the higher summits; breaks may be useful but not dependable.
Temperature and wind chill
Around 12°C at 600 m, feeling like 10°C in the wind.
Freezing level
Above the summits.
Daylight
Sunrise 06:18 — Sunset 20:10 — about 13.9 hours daylight.
Overnight · 6 p.m.–9 a.m.Wild campingBetaThunder risk is around 45% in parts of the area; avoid exposed pitches if storms develop. 38/100Poor · 600 m View detailsHide details
Full regional overnight outlook
Across representative hills, open-hillside camping looks poor around 600 m (38/100). Some overnight rain is likely, so expect a damp pitch or pack-up.
Elevation reference (open ground)
- Wind / gust
- 7 / 13 mph
- Coldest
- 12.6°C
- In cloud
- Unlikely
- Condensation
- High
- Wind / gust
- 8 / 16 mph
- Coldest
- 11.9°C
- In cloud
- 19% of night
- Condensation
- High
Open-hillside guidance across representative hills. Local shelter, ridges, tent design and the exact pitch can change conditions substantially. How to use the wild-camping forecast.
Daytime · exposed rockClimbing & scramblingBetaWet rock is likely on some representative hills. 44/100Poor · Mixed View detailsHide details
Full regional climbing & scrambling outlook
Conditions for exposed scrambling across the area look mixed (44/100). 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 29 August 2026 at 04:40 UTC. See typical weekly and monthly conditions for Clwydian Range and Berwyns.