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.
Thursday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Thursday 4th December 2025
Last updated
Wed 3rd Dec 25 at
4:25PM
Summary for all mountain areas
A complex weather situation with areas of frequent or persistent rain and hill snow, focused from the southern Highlands to northern England; often strong SE'ly winds. Further north in the Highlands, generally drier with higher cloud breaks. In Wales, becoming showery westerlies with risk of hail.
Headline for Brecon Beacons
Early rain clears, then squally showers, cloud rising.
How windy? (On the summits)
May fluctuate considerably at first, a possible lull around dawn, but soon westerly abruptly 25-30mph, chance 40mph for a few hours morning. Easing toward 20-25mph afternoon, but sudden squalls in showers.
Effect of the wind on you?
Arduous conditions around dawn with wind chill will soon start to ease, trending towards fairly small effects.
How Wet?
Early rain, then showers south and west
Early rain in the east soon passes from most of the region, but small risk of persisting longer through morning in eastern mid-Wales. Scattered showers follow onto southern and western slopes.
Cloud on the hills?
Improving to banks over high tops
Variable banks of cloud on high terrain, a few lower banks too, tending to clear through morning to just banks over high terrain as showers come and go. An increasing chance of clear summits.
Chance of cloud free summits?
20% rising to 60% afternoon
Sunshine and air clarity?
Glimpses of weak sun appearing afternoon. Good visibility though some haze.
How Cold? (at 750m)
2C Feeling like -8C in exposure to stronger winds on tops during day.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Friday 5th December 2025
Last updated
Wed 3rd Dec 25 at
4:25PM
How windy? (On the summits)
Southerly 30-35mph, soon rising to 50mph afternoon with gusts over tops up to 60mph+. Easing overnight.
Effect of the wind on you?
Strenuous walking early deteriorates to widely challenging conditions with powerful gusts. Severe wind chill in exposure.
How Wet?
Rain sets in widely with heavy falls
Patchy showery rain/sleet drifts inland from the south early, merging into broader areas then setting in widely around the midday hours with heavy falls into nighttime.
Cloud on the hills?
Becoming extensive
From dawn cloud likely caps the high tops with banks on high western terrain; Black Mountain perhaps clear. Soon lowering widely towards 600-700m as rain arrives, as low as 400m south and westernmost slopes.
Chance of cloud free summits?
Soon lowering to less than 10%
Sunshine and air clarity?
Overcast. Visibility becomes poor as rain sets in.
How Cold? (at 750m)
3C, rising to 5C, remaining warmer into night. Feeling like -12C in strong wind.
Freezing Level
700-800m, rising above the summits through morning.
Viewing Forecast For
Brecon Beacons
Saturday 6th December 2025
Last updated
Wed 3rd Dec 25 at
4:25PM
How windy? (On the summits)
Southwesterly 35 to 45mph, risk often 50mph high tops.
Effect of the wind on you?
Challenging walking conditions, frequent buffeting affecting balance on exposed tops and ridges; marked wind chill.
How Wet?
Frequent showery rain
Rain on and off most or all day, a mix of drizzle where in cloud and some steadier rain, but heavier showery bursts coming in from west, possible hail.
Cloud on the hills?
Fairly extensive tops
Often covering higher slopes, bases varied in and out of rain, mostly 600 to 800m. More frequent to mid-slopes western areas. Some breaks higher up east and mid-Wales.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Glimpses of sun mostly east. Visibility varied, poor in rain, intermittently good out of cloud.
How Cold? (at 750m)
5C. Wind chill feeling like -7 to -10C.
Freezing Level
Above the summits.
Planning Outlook
Generally unsettled through the weekend and into next week with areas of low pressure circulating near to the British Isles. Temperatures often near to freezing point on higher Scottish mountains, at times on tops elsewhere, though some thawing will occur periodically even to high tops in the Highlands. A complex series of frontal systems bringing spells of rain and some upland snow, mixed with showers with hail mostly near western coasts. Wind speeds will also vary, often south to southwesterlies, at times reaching gale force on tops, but intermittent lulls.