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.
Wednesday'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.
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.
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
Wednesday 3rd December 2025
Last updated
Tue 2nd Dec 25 at
4:10PM
Summary for all mountain areas
Widely breezy, strongest northern England and Scotland, early gales over high Munros; easing but staying blustery northwest Scotland. Showery rain onto west coast slopes down to Wales (snow on high terrain) most of the day, some reaching further east afternoon. Greatest chance of dry weather south Pennines.
Headline for Brecon Beacons
Breezy in exposure; showery rain, mostly south/west
How windy? (On the summits)
Southwesterly 25-30mph most of the day, some stronger breezes over the tops early. Significantly rising speeds after dark and the later overnight hours.
Effect of the wind on you?
Comfort of walking becoming affected or impeded, particularly early on the high tops. Significant deterioration of conditions in the overnight hours.
How Wet?
Showers, mostly south and west slopes
Showers onto southern slopes and high tops all day, most west of Pen-Y-Fan; may become more frequent and reach more widely afternoon.
Cloud on the hills?
Covering high tops with lower banks during showers, mostly south/west
High tops shrouded most of the day with banks on southern slopes as low as 500m during showers. Higher breaks here and there, though alternately filling in again as well.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of sun north of high tops, chance increasing as the day goes, particularly low slopes. Very good visibility out of cloud.
How Cold? (at 750m)
3C. Feeling like -5 to -8C in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Thursday 4th December 2025
Last updated
Tue 2nd Dec 25 at
4:10PM
How windy? (On the summits)
Pre-dawn, southerly 40-45mph. Soon westerly 25-30mph, further easing towards 20-25mph.
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?
Some showers south and west
Early rain in the east soon passes. Scattered showers follow onto southern and western slopes, though many areas may be substantially dry.
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?
Rising to 60%
Sunshine and air clarity?
Glimpses of weak sun appearing afternoon. Good visibility though some haze.
How Cold? (at 750m)
2C Feeling like -10C early in the day in the wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Friday 5th December 2025
Last updated
Tue 2nd Dec 25 at
4:10PM
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.
Planning Outlook
Low pressure circulating to the west and north will dominate the weather for the next 7 to 10 days, bringing generally unsettled weather. A brief period of slack pressure on Thursday into Friday will ease winds for a time though patchy rain will linger in several areas. Strong southwesterly winds return over the weekend bringing cloud and rain to many mountains, most persistent on southwestern slopes. Temperatures and freezing level will vary, but staying chilly with highest terrain likely near or below 0C. Several low pressure systems with then pass through next week, brining frequent periods of cloud, rain, and strong wind, likely gale force on high terrain at times. Occasional windows of dry, brighter weather will occur, best chance east.