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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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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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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Sunday 30th November 2025
Last updated
Sat 29th Nov 25 at
4:30PM
Summary for all mountain areas
A fine day for many places, sunshine and broken cloud. Much terrain frozen in the Highlands, where a lull in wind, later strengthening southerlies in west. Strong northwesterlies for England and Wales tend to drop. Some local showers move inland from the Irish Sea. Deteriorating all areas into night.
Headline for Brecon Beacons
Chilly breeze, gales into night. A few showers, some sun.
How windy? (On the summits)
Northwesterly 20-25mph early morning, or stronger up to dawn, easing westerly 15mph, in afternoon southwesterly 20mph. Increasing into night south-southwesterly 50-60mph.
Effect of the wind on you?
Marked wind chill and blustery at first, lessening during morning. Deteriorating into night.
How Wet?
Local showers mainly west
Wet underfoot, or icy on highest terrain. One or two showers on hills near Cardigan Bay, rare further eastward.
Cloud on the hills?
Patches mostly higher tops
Some patchy cloud banks drift over higher slopes in the morning, most frequent toward west Cambrians. May come and go over highest summits widely. Best breaks to tops in eastern areas.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Patchwork of cloud and sun; high cloud builds later in day from west. Visibility excellent.
How Cold? (at 750m)
0C, then rising after dark, reaching 6C by middle of night. Feeling like -7C if exposed to wind early morning.
Freezing Level
800m or just above; lifting above tops later evening into night.
Viewing Forecast For
Brecon Beacons
Monday 1st December 2025
Last updated
Sat 29th Nov 25 at
4:30PM
How windy? (On the summits)
South to southwesterly 50 to 60mph, powerful gusts in places downslope to north/east; may start to lessen later.
Effect of the wind on you?
Difficult conditions all day, challenging balance, gusts may knock you over; significant wind chill.
How Wet?
Prolonged heavy rain
Rain rarely ceasing all day, sustained heavy falls widely. Breaking up into showers into night. Very wet underfoot with flooding developing.
Cloud on the hills?
Extensive
Blanket cloud across the hills, from low-to-mid slopes upward in areas toward south and west of Brecon. Some higher bases to 600m eastern mid-Wales.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast and dull. Poor visibility.
How Cold? (at 750m)
7C, later in day starting to drop. Wind chill feeling nearer -7C in exposure on higher areas.
Freezing Level
Rising from overnight, staying above freezing to the tops all daytime.
Viewing Forecast For
Brecon Beacons
Tuesday 2nd December 2025
Last updated
Sat 29th Nov 25 at
4:30PM
How windy? (On the summits)
Southwesterly 20 to 25mph, at times squally gusts 30mph.
Effect of the wind on you?
Breezy over the hills, blustery on higher exposed tops, starting to affect comfortable walking. Noticeable wind chill.
How Wet?
Frequent hail showers west; flooding
Showery bursts coming inland from western coasts, with hail, chance isolated thunder in west. More often dry east Wales. Wet underfoot, streams in spate, possible flooding after previous rain.
Cloud on the hills?
Most persistent toward south/west
Banks of low cloud particularly over southern slopes in the morning, tending to lift above 600m, but may often cap higher tops west of Brecon, varied around rain. Breaks to tops more often in east.
Chance of cloud free summits?
30% south/west, to 60% east/mid Wales
Sunshine and air clarity?
Glimpses of sun mostly toward east and mid Wales, where visibility often very good. Reduced to poor at times in showers.
How Cold? (at 750m)
2 or 3C. Wind chill feeling like -5C.
Freezing Level
Above the summits
Planning Outlook
Areas of low pressure circulating to the west and north will dominate the weather pattern in the week ahead, bringing generally unsettled weather. Southwesterly air and briefly milder into Monday, with rain for most places at times, but prolonged heavier rain for England and Wales. Then typically cooler with showery conditions - higher mountains near or just below freezing point likely for the remainder of the week - some snow on tops, occasional hail. Wind speed likely to vary, some squally gusty spells, but also some lulls possible during the week.