Bannau Brycheiniog (Brecon Beacons)
Wednesday 2 September 2026 · The central Beacons, Black Mountains and Fforest Fawr
Why: Rain timing may shift by several hours, which could change how much of the main walking period stays dry.
Heavy rain and spate-prone crossings are the main concern. Expect persistent rain, with cloud coming and going on the tops.
Sunshine and sky
Extensive cloud. Cloud is likely to remain extensive for much of the day.
These are direct modelled sunshine hours during daylight, not the probability of sunshine. Cloud cover and summit cloud are assessed separately in the forecast above. The regional median prevents one unusually bright or dull summit cell defining the whole area.
High-ground wind (700 m)
Southwesterly 25-30 mph at 700 m. Gusts reaching around 45 mph at 700 m, with locally higher values possible on the most exposed tops. Strongest early (around 25 mph), easing toward 20 mph later.
Walking impact
Blustery on exposed ridges and liable to affect balance at times.
Ground conditions
The ground is likely to be wet after recent rain.
Spate risk
High spate risk based on forecast rainfall. Burns and unbridged crossings may become difficult or impassable. The heaviest rain is expected early in the day. Crossing risk is expected throughout the day, continuing overnight and easing after around midnight. Turn back if a crossing looks unsafe.
Rain and showers
Persistent rain for much of the day. The heaviest rain is expected early in the day.
Cloud-free summits
Around 35%.
Cloud and visibility
Cloud bases mostly around 600-1000 m. 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 700 m, feeling like 8°C in the wind.
Freezing level
Above the summits.
Daylight
Sunrise 06:26 — Sunset 19:59 — about 13.6 hours daylight.
Overnight · 6 p.m.–9 a.m.Wild campingBetaGusts near 35 mph make sheltered pitches important. 64/100Mixed · 600 m View detailsHide details
Full regional overnight outlook
Across representative hills, open-hillside camping looks mixed around 600 m (64/100). Open-ground gusts may reach about 35 mph, so sheltered pitches will matter. Some overnight rain is likely, so expect a damp pitch or pack-up.
Elevation reference (open ground)
- Wind / gust
- 19 / 30 mph
- Coldest
- 13.9°C
- In cloud
- Unlikely
- Condensation
- High
- Wind / gust
- 23 / 36 mph
- Coldest
- 13.7°C
- In cloud
- Unlikely
- Condensation
- High
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 & scramblingBetaGusts near 45 mph increase the seriousness of exposed ground. 0/100Poor · Very poor View detailsHide details
Full regional climbing & scrambling outlook
Conditions for exposed scrambling across the area look very poor (0/100). Rain is likely to leave rock wet; polished slabs, vegetation and drainage lines may be notably worse. Gusts may reach about 45 mph on exposed ground, making crosswinds an important route consideration. Mapped summit-point geology across the representative hills includes sandstone or gritstone; 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 1 September 2026 at 15:33 UTC. See typical weekly and monthly conditions for Bannau Brycheiniog (Brecon Beacons).