Bannau Brycheiniog (Brecon Beacons)
A mixed day in Bannau Brycheiniog (Brecon Beacons), with sleet or snow on the tops and strong, gusty winds.
Sunshine and sky
Little sunshine. Very little direct sunshine is indicated.
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.
Overnight forecast: 17:00–08:00 (UK local time), in Wild camping below.
High-ground wind (700 m)
At around 700 m, expect a north-easterly wind of 30–40 mph, gusting 40–50 mph, strongest first thing and easing later. Gusts like that are strong enough to knock you off balance, so take care near edges and on narrow ridges.
Walking impact
Gusts of 40–50 mph are strong enough to knock you off balance, so take care near edges and on narrow ridges.
Ground conditions
The ground is likely to be wet after recent rain.
Rain and showers
Sleet at first, clearing by mid-morning. Expect up to 2 mm in total, measured as melted water, so any snow would lie deeper. On some hills, sleet is possible on the tops. Small temperature changes could shift the mix towards rain or snow. Sleet or snow is possible on some higher tops in the morning, with small temperature changes affecting the mix. The air freezing level is roughly 900 to 1000 m above sea level. Snow can fall below this, but its lower limit is uncertain.
Cloud-free summits
Clear-summit estimate: about 40% early, about 55% around midday and about 60% later.
Cloud and visibility
The tops are likely to drift in and out of cloud, with the best chance of clear tops later in the day.
Temperature and wind chill
At around 700 m it will be 0 to 4°C, feeling like -8 to -4°C in the wind. Take a hat, gloves, a windproof and a spare warm layer. Pack waterproofs too, and keep a warm layer dry in your pack.
Freezing level
The freezing level is close to summit height.
Daylight
Sunrise 07:39, Sunset 16:18, about 8.7 hours daylight.
Overnight · 17:00–08:00Wild campingBetaAcross these hills, a mixed night to camp, mainly because of the cold: dry, with light winds. 59Mixed · 600 m View detailsHide details
Full regional overnight outlook
Across these hills, a mixed night to camp, mainly because of the cold. Light winds on open ground, gusting no more than about 20 mph. It should stay dry. A cold night, down to about 2°C around 600 m.
Moon overnight
Waxing gibbous moon
- Illuminated disc
- 75%
- Moonrise
- Outside this window
- Moonset
- 02:13 next morning GMT
Cloud and terrain vary across the area. Illumination describes the sunlit part of the Moon, not brightness at your pitch.
Overnight window: 19 Nov, 17:00 GMT to 20 Nov, 08:00 GMT. Approximate open-horizon times; hills can hide the Moon. Still take a headtorch.
Representative location: 51.884, -3.437. Times vary across the area.
Elevation reference (open ground)
- Wind / gust
- 7 mph / 17 mph
- Coldest
- 2.0°C
- In cloud
- 0% of modelled night
- Condensation
- Low
- Wind / gust
- 8 mph / 21 mph
- Coldest
- 1.7°C
- In cloud
- 0% of modelled 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 & scramblingBetaSnow is likely to be lying on some high ground. Scrambling may require winter mountaineering skills and equipment. Rock may be damp or still drying. Gusts near 50 mph may affect balance on exposed rock. 0Poor · Very poor View detailsHide details
Regional climbing & scrambling outlook
A broad guide to dampness and exposed rock across the area, not a forecast for every crag. Lower, sheltered crags and individual rock types may behave differently.
Conditions for exposed scrambling across the area look very poor (0/100). Some rock may remain damp or incompletely dried, especially in shade and seepage lines. Gusts may reach about 50 mph on exposed ground, making crosswinds an important route consideration. Mapped summit-point geology across the representative hills includes sandstone or gritstone. Rock can therefore respond differently to moisture 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.
Recommended kit for this dayWeather-aware packing prompts, plus your core hillwalking kitView kit
For a day hillwalk, not a complete route-specific checklist. Carry navigation and backup you can use, warm and waterproof layers, suitable footwear, food and water, a headtorch, emergency shelter, first aid and a way to call for help. Snow, ice, technical terrain and overnight trips need additional equipment and skills.
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Weather data: Open-Meteo (CC BY 4.0). Adapted by Mountain Weather.
Updated 14 November 2026 at 16:37 UTC. See typical weekly and monthly conditions for Bannau Brycheiniog (Brecon Beacons).