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.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Brecon Beacons
Thursday 18th September 2025
Last updated
Wed 17th Sep 25 at
4:30PM
Summary for all mountain areas
Strong upland wind or gales across the mountains. Frontal wave bringing persistent, heavy rain and extensive cloud from North Wales to the Southern Uplands. Highlands drier, especially east of A9, but showery near the west and north-west coast in the morning. Temperatures mild but with notable wind chill.
Headline for Brecon Beacons
Strong upland wind. Persistent rain and cloud near west coast.
How windy? (On the summits)
Southwesterly 35-45mph; marked increase with height. Powerful turbulent gusts.
Effect of the wind on you?
Arduous or difficult walking conditions will make progress challenging. Powerful gusts, especially in passes, may blow you over.
How Wet?
Persistent, especially west coast
Persistent light rain in the morning breaking up to become more intermittent in the afternoon, especially well inland. Coastal up-slopes will remain drizzly.
Cloud on the hills?
Extensive
Extensive cloud down to lower west-coastal slopes where in rain. Highest cloud base in eastern mid-Wales. Cloud base lifting in the afternoon, away from the coast, but unlikely to clear summits.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Little or no sunshine. Excellent visibility inland below cloud deck; hazy over the Bristol Channel.
How Cold? (at 750m)
14C. Feeling around 5C in the wind.
Freezing Level
Well above the summits.
Viewing Forecast For
Brecon Beacons
Friday 19th September 2025
Last updated
Wed 17th Sep 25 at
4:30PM
How windy? (On the summits)
Southwesterly 25 to 30mph, to 35mph around some higher tops, very gusty in places.
Effect of the wind on you?
Blustery over higher terrain, affecting balance where exposed on tops. Marked wind chill.
How Wet?
Persistent drizzle
Fairly constant drizzle and occasionally light rain, especially on areas further west and southwest. Eastern mid-Wales likely to drier.
Cloud on the hills?
Extensive
Cloud from lower slopes toward Preseli hills, west Cambrians and southwestern slopes of Brecon Beacons. Cloud base will be higher well inland but any breaks to tops will be limited.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Little or no sunshine Poor visibility, locally better in east.
How Cold? (at 750m)
13C, but feeling like 3 to 5C in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Saturday 20th September 2025
Last updated
Wed 17th Sep 25 at
4:30PM
How windy? (On the summits)
Forecast details uncertain. Increasing through the day to southerly 20 to 40mph, risk 50mph.
Effect of the wind on you?
Increasingly arduous conditions, with balance being affected in exposed spots and cols in the afternoon. Marked wind chill.
How Wet?
Uncertain: possibly only light rain
Risk of sustained rain, but likely much drier with occasional light rain. Highest risk on mountains near Cardigan Bay, particularly mid-Wales.
Cloud on the hills?
Extensive in morning
Hills shrouded down to lower coastal slopes. Likely lifting to mid- to upper-slopes in the afternoon and breaks developing. Should heavier rain arrive, cloud will remain low and extensive all day.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Sun may break through in the afternoon. Poor in the morning, hazy in the afternoon if front clears.
How Cold? (at 750m)
9C. Feeling around 0C in the wind.
Freezing Level
Above the summits.
Planning Outlook
Weather remains mixed into and through the weekend, often with high winds, regions of persistent rain and extensive cloud. Temperatures falling through Saturday across the UK with the higher Scottish summits dropping below freezing and frosts in some glens. Looking increasingly likely that high pressure will take hold from the north on Sunday evening, bringing a period of more settled weather across the country for a couple of days at least, perhaps longer.