Brecon Beacons
Includes all higher summits in the southern half of Wales: the Bannau Brycheiniog / Brecon Beacons National Park, southern Cambrian Mountains and highest Preseli hills.
Sunday's Forecast
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Brecon Beacons
Sunday 21st December 2025
Last updated
Sat 20th Dec 25 at
4:29PM
Summary for all mountain areas
A blustery, gusty morning in northern England and Scotland, gales for a time in northwest Scotland, tending to ease. Patchy rain from central Scotland down the spine of the Pennines eases into drizzle over the high tops, drizzle in east Wales too with extensive hill fog in these areas. Best of breaks west Wales and NW Highlands.
Headline for Brecon Beacons
Fog and patchy rain/drizzle east, clearer west
How windy? (On the summits)
South-southeasterly 20-25mph at dawn, trending easterly as the day goes. Winds may locally ease at times as well, though staying stronger in exposure.
Effect of the wind on you?
Fairly small on many slopes but blustery gusts will blow over the tops from time to time.
How Wet?
Patchy drizzly rain, amounting to little during daylight
Patchy rain drifts onto the southern slopes, some slipping further north but amounting to little. Rain arrives more widely overnight.
Cloud on the hills?
Extensive east, some breaks west
Hills near and east of Brecon likely shrouded all day with bases reaching to lower slopes. Higher bases and better chance of cloud breaks to higher terrain around Picws Du.
Chance of cloud free summits?
10%; 40% northwestern slopes
Sunshine and air clarity?
Mostly overcast and dull with poor visibility, though glimpses of weak sunshine are likely west with good visibility here.
How Cold? (at 750m)
Around 3 or 4C. Warming slightly overnight.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Monday 22nd December 2025
Last updated
Sat 20th Dec 25 at
4:29PM
How windy? (On the summits)
Southeasterly 15 to 25mph; some stronger gusts over the tops, risk up to 35mph.
Effect of the wind on you?
Blustery at times with marked wind chill and some buffeting where exposed to the wind.
How Wet?
Early rain and drizzle, soon largely dry
Widespread rain from overnight soon breaks into patchy rain and drizzle, continue to ease into just isolated drizzle on high tops.
Cloud on the hills?
Fairly extensive, highest bases Cambrians
Extensive down to middle slopes on the hills near and east of Brecon. Higher bases west, particularly around the Cambrian mountains, though unlikely breaking above 700m.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little or no sun. Visibility becomes good out of cloud as morning rain clears.
How Cold? (at 750m)
5 or 6C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Tuesday 23rd December 2025
Last updated
Sat 20th Dec 25 at
4:29PM
How windy? (On the summits)
North-northeasterly 10-20mph, gradually strengthening afternoon.
Effect of the wind on you?
Fairly small, though some noticeable effects in exposure later in the day.
How Wet?
Often dry
Some light patchy rain here and there, though amounting to little with many hills often dry.
Cloud on the hills?
Fairly extensive
High tops in fog most or all day. Lower banks will come and go, reaching as low as valley bottoms early in the day. Bases tend to be higher on the southern slopes.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Little or no sun. Good visibility where below cloud.
How Cold? (at 750m)
3 or 4C.
Freezing Level
Above the summits
Planning Outlook
Cloud and patchy rain lingers for a few more days early next week, then a slow change to drier and chiller weather into the Christmas period as high pressure builds to the north. Easterly winds will be dominant, the strongest winds in England and Wales. Cloud may be fairly sheet-like in the east sometimes, though variably more extensive or broken. The coldest air will reach England and Wales on the easterly wind with freezing levels reaching as low as 400-600m in Wales, staying slightly warmer in northern Scotland with freezing levels nearer the high summits for a time under the core of high pressure.