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.
Monday'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
Monday 22nd December 2025
Last updated
Sun 21st Dec 25 at
4:30PM
Summary for all mountain areas
Strong and gusty SE'ly winds. Rain fairly widely across the Highlands in the morning, easing but leaving patchy drizzle and low cloud shrouding the hills. Low cloud and some drizzly rain for England and Wales, but some breaks for the Lakes, also clearing conditions moving into south Wales.
Headline for Brecon Beacons
Gusty wind easing. Some drizzle, low cloud, clearing.
How windy? (On the summits)
Southeasterly 25-30mph, gusty around dawn, gradually easing to 15-20mph.
Effect of the wind on you?
Blustery early in day with marked wind chill and some buffeting where exposed to the wind, improving.
How Wet?
Early rain and drizzle, drying up
Widespread rain from overnight soon breaks into patchy drizzle, most frequent on east and southeast hill groups early morning, tending to fade by midday, possibly sooner; then dry.
Cloud on the hills?
Lifting and clearing, best in west
Extensive down to middle slopes on the hills from dawn. Higher bases west, and cloud tending to rise and break more widely, largely clearing western hills into afternoon. Some patches may linger on tops southeastern areas.
Chance of cloud free summits?
20% rising to 50%, 70% west Wales.
Sunshine and air clarity?
Overcast dull start, brightening up, some sun if high cloud thins. Visibility becomes very good out of cloud as morning drizzle clears.
How Cold? (at 750m)
5C, may drop a degree or so afternoon.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Tuesday 23rd December 2025
Last updated
Sun 21st Dec 25 at
4:30PM
How windy? (On the summits)
East to northeasterly 10 to 25mph, gradually strengthening afternoon, increasingly gusty 30mph by dusk.
Effect of the wind on you?
Fairly small, though some noticeable effects in exposure later in daytime, gusty winds becoming uncomfortable.
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 southwestern slopes.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Little or no sun. Good visibility where below cloud; hazier eastern hills.
How Cold? (at 750m)
3 or 4C; some western slopes slightly warmer; lowering to 0C into night.
Freezing Level
Above the summits; then dropping close to freezing on some higher slopes into night.
Viewing Forecast For
Brecon Beacons
Wednesday 24th December 2025
Last updated
Sun 21st Dec 25 at
4:30PM
How windy? (On the summits)
A gusty easterly, 35-45mph.
Effect of the wind on you?
Strenuous-to-arduous walking with buffeting in exposure. Expect stability challenges and significant wind chill.
How Wet?
No rain expected
Cloud on the hills?
Mostly high eastern terrain
Cloud banks frequently covering high terrain of the Black Mountains and Pen-Y-Fan group. More patchy to the west, southern slopes often free of cloud.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Patchy sunshine to the east, more often sunny west. A haze at first but visibility improving.
How Cold? (at 750m)
-1C east, up to 3C westernmost hills, becoming more widely cool late in the day. Feeling like -10 to -13C in direct wind.
Freezing Level
Poorly defined: 700-800m, though warm downslope winds to the west will reduce freezing potential here.
Planning Outlook
Cloud and patchy rain lingers early this 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, best northwest. 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 some inversion conditions likely over higher terrain; frost into glens.