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.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
Hazy, some fog banks
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Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of 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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
Hazy, some fog banks
Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of 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
Tuesday 23rd December 2025
Last updated
Mon 22nd Dec 25 at
4:08PM
Summary for all mountain areas
A fairly extensive sheet of cloud cloaks eastern Scotland southward down the Pennines and east Wales; some mist and haze, fine drizzle on eastern slopes. Cloud more broken on slopes and summits near west coasts, substantially dry here. An easterly wind south Pennines and Wales, strengthening into night.
Headline for Brecon Beacons
Cloudy and hazy east, some breaks west; blustery in exposure
How windy? (On the summits)
At and before dawn, southeasterly 30-35mph. Shifting easterly and easing to around 20mph for a few hours, then a gusty northeasterly afternoon into dusk, strengthening again with 35mph gusts.
Effect of the wind on you?
Changeable: fairly small around the midday hours, though gusty in exposure; walking more strenuous early and late in the day.
How Wet?
Patchy light rain
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 in the east. Bases tend to be higher on the southwestern slopes.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Best of sun breaks on low slopes of the western Cambrians, little sun elsewhere. Good visibility out of cloud but limited by haze.
How Cold? (at 750m)
3 or 4C; notably warmer on westernmost slopes, perhaps locally up to 7C at first. Lowering into and overnight, perhaps to 0C in the east.
Freezing Level
Above the summits; then dropping close to freezing on some higher eastern slopes into night; westernmost slopes likely stay above freezing.
Viewing Forecast For
Brecon Beacons
Wednesday 24th December 2025
Last updated
Mon 22nd Dec 25 at
4:08PM
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, and generally improving more widely later.
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 milder downslope winds to the west will reduce freezing potential here.
Viewing Forecast For
Brecon Beacons
Thursday 25th December 2025
Last updated
Mon 22nd Dec 25 at
4:08PM
How windy? (On the summits)
Easterly 45-55mph, very strong gusts in exposure and downslope to the west, particularly western Cambrians.
Effect of the wind on you?
Challenging conditions in exposure with gusts nearly constantly challenging stability. Severe wind chill.
How Wet?
No rain expected
Cloud on the hills?
Mostly high eastern tops
Banks come and go over the high terrain around the Black Mountains, patchier near Pen-Y-Fan, and more fleeting on other high tops. Many slopes further west stay clear, particularly the coastal-facing Cambrians.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Patchy sunshine east, more extensive westernmost slopes. Excellent visibility.
How Cold? (at 750m)
-1C, westernmost slopes a few degrees warmer. Feeling like -15C or colder in direct wind.
Freezing Level
300-400m from dawn, rising slightly, up to 600m in the west.
Planning Outlook
Christmas Eve and Christmas Day will be dry: easterly winds are dominant with the strongest winds in England and Wales. Cloud may be fairly sheet-like in the east sometimes, though variably more extensive or broken, best of breaks in western areas. Turning colder too, the coldest air in England and Wales with freezing levels reaching as low as 400-600m in east Wales. Staying slightly warmer in northern Scotland with some inversion conditions likely over higher terrain; frost into glens and poorly defined freezing levels. High pressure stays put to the north into the weekend, maintaining dry weather, easterly winds, and most cloud in eastern areas. Temperatures will stay chilly.