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.
Dry and sunny
Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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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.
Dry and sunny
Extensive strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Brecon Beacons
Monday 17th November 2025
Last updated
Sun 16th Nov 25 at
3:00PM
Summary for all mountain areas
Cold everywhere, staying sub-zero over high terrain, plus some frost lower down in morning; considerable chill factor if exposed to wind, but speeds tending to lessen all areas. Largely dry, local snow flurries moving in northern Scotland. Some patchy cloud mostly northern half of the Highlands, sunnier elsewhere.
Headline for Brecon Beacons
Windy morning, easing afternoon. Dry with sun, hills clear.
How windy? (On the summits)
Northeasterly 25-30mph or briefly stronger at dawn, gradually lessening in morning, to 15mph by the afternoon, a lull around dusk. Then rising northwesterly after dark to 20-25mph, later 30mph into night.
Effect of the wind on you?
Walking strenuous with considerable wind chill early morning, trending towards lesser impacts.
How Wet?
No precipitation expected
Cloud on the hills?
None expected
Any early fragments on some slopes soon all clearing.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Widely sunny with excellent visibility.
How Cold? (at 750m)
0C. Feeling like -10C in strongest morning wind.
Freezing Level
700-800m, but up to just before dawn will have been above summits. Frost some lower elevations at dawn.
Viewing Forecast For
Brecon Beacons
Tuesday 18th November 2025
Last updated
Sun 16th Nov 25 at
3:00PM
How windy? (On the summits)
Westerly 25-30mph at dawn, slowly strengthening, up to 35-40mph over tops into nighttime.
Effect of the wind on you?
Walking likely strenuous much of the day with wind chill; conditions slowly deteriorating, particularly into night.
How Wet?
Showers, then patchy rain
Scattered showers onto western hills through the morning. Showers will turn into patchy rain through afternoon with some heavier bursts of more frequent rain.
Cloud on the hills?
Banks west, more widely afternoon
Banks of cloud come and go above 700m on western hills from dawn. High breaks east, particularly east of Pen-Y-Fan where summits may be often clear for several hours. Cloud fills in more widely with bases lowering as rain arrives, though still breaks.
Chance of cloud free summits?
60% lowering to 20%
Sunshine and air clarity?
Bright in the east in the morning, trending overcast with a few brighter spells. Excellent visibility, turning poor with rain, very poor on high ground.
How Cold? (at 750m)
2C. Feeling like -8C in strongest direct wind.
Freezing Level
At or above the high summits, though some local frosty patches onto lower slopes at dawn.
Viewing Forecast For
Brecon Beacons
Wednesday 19th November 2025
Last updated
Sun 16th Nov 25 at
3:00PM
How windy? (On the summits)
Northerly 30 to 40mph, likely strongest sustained speeds in morning.
Effect of the wind on you?
Challenging walking conditions on higher exposed terrain especially morning, very blustery all day; significant wind chill.
How Wet?
Becoming dry, local showers west
Patchy snow, sleet or rain lower slopes, from before dawn may linger into morning, tending to break up to be dry most places. Locally toward Pembrokeshire, snow and hail showers remain frequent.
Cloud on the hills?
Lifting above many hills
Varied cloud over higher slopes early in the day, tending to lift and break up, leaving occasional patches over the tops.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Fairly cloudy start, more sun develops with time. Visibility may start poor if in snow, but becoming excellent.
How Cold? (at 750m)
-1 or -2C. Wind chill feeling like -15C in stronger speeds.
Freezing Level
600-700m, slight rise into afternoon; also frost in some valleys after dawn, again soon from dusk.
Planning Outlook
A cold week ahead, staying below freezing across all mountains, much terrain will be frozen from valleys upward. An area of low pressure and associated fronts will pass southeastward during Tuesday, bringing some persistent snowfalls, including to lower slopes particularly inland across the Highlands, some substantial accumulations over higher terrain. Strong to gale force northerlies Wednesday-Thursday, bringing snow and hail showers focused on northern Scotland and onto north-facing coastal districts elsewhere. By Friday into next weekend, winds shift back westerly and freezing levels rise to upper slopes - some rain likely, snow on high tops at times.