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
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.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra 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.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Brecon Beacons
Monday 8th December 2025
Last updated
Sun 7th Dec 25 at
4:24PM
Summary for all mountain areas
Southwesterly winds often gale force over most higher terrain of Britain, less strong toward the north of the Highlands. Close to freezing only on higher Scottish tops. Rain frequent over western Scotland, some patchy rain passing eastwards. Showery rain common on some western hills in England and Wales.
Headline for Brecon Beacons
Windy. Patchy rain, cloud on tops.
How windy? (On the summits)
Southwesterly 40 to 50mph from dawn, easing to 30-35mph through morning, fluctuating around these speeds for rest of day. Briefly easing further into evening, but then onward into night rapid increase to 70mph+.
Effect of the wind on you?
Strenuous walking with buffeting in exposure all day, making balance challenging on high tops, more difficult early. Considerable wind chill. Deteriorating as a storm develops onward into night.
How Wet?
Occasional showery rain
Pulses of rain and some brief heavier showers coming in from the southwest. Intermittently dry during the day. Rain develops from south into late evening, setting in heavy up to midnight and onward into night.
Cloud on the hills?
Varied, often covering high terrain
Largely cloudy over high terrain most of the day, some variability of bases between 600-700m, odd higher breaks north of the high tops but also filling in for periods mainly southern slopes.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little sunshine expected, occasional glimpses eastern mid-Wales. Variable visibility, at times good, reduced in rain.
How Cold? (at 750m)
6 or 7C, a slow rise into night to 8C. If exposed to stronger winds, feeling like -7C on high tops.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 9th December 2025
Last updated
Sun 7th Dec 25 at
4:24PM
How windy? (On the summits)
South-southwesterly 55-65mph, gusts reaching 75mph. Easing evening into nighttime, trending southwesterly.
Effect of the wind on you?
Widely difficult conditions making any mobility tortuous - risk severe in exposure. Significant wind chill.
How Wet?
Rain much of the day, flooding
Incessant heavy rain from overnight lingers after dawn. Rain breaks into showery bursts through morning, mostly west, risk broader areas returning. Beware fast-rising streams and local floods.
Cloud on the hills?
Extensive, local improvements later
Blanket cloud from middle or lower slopes up through the morning, always lowest on south-facing. Breaks to middle slopes occurring afternoon, chance of breaks up to 600-700m Black Mountains.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
Overcast and dull. Poor visibility.
How Cold? (at 750m)
9 to 11C, sharply dropping afternoon towards 7C by nightfall. Feeling as cold as -5C in afternoon wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 10th December 2025
Last updated
Sun 7th Dec 25 at
4:24PM
How windy? (On the summits)
Southwesterly 35 to 45mph.
Effect of the wind on you?
Challenging walking conditions over the hills with frequent buffeting; considerable wind chill.
How Wet?
Occasional showers
Patchy showery rain mostly west and southwestern areas.
Cloud on the hills?
Mostly higher western tops
Cloud base varying, mostly confined to upper slopes, most common toward western areas.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Occasional sun mostly eastern mid Wales. Slight haze, but visibility mostly fairly good.
How Cold? (at 750m)
4 or 5C. Wind chill feeling like -7C.
Freezing Level
Above the summits
Planning Outlook
A very unsettled spell through the next 10 days as southwesterly winds prevail and low pressure systems move in from the Atlantic. Stormy conditions widely over the mountains on Tuesday, gales remaining severe on high terrain into Wednesday, then potentially intensifying again on Thursday. Temperatures only close to freezing on higher Scottish tops this week, even here will experience spells above freezing with thawing, leaving snow increasingly patchy, but beware some icy surfaces on the very highest tops where some refreezing occurs. Rainfall will be frequent and heavy, sometimes showery with hail. Expect wet ground conditions and further flooding of streams and some rivers.