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
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Thunderstorms
Bursts of rain, torrential downpours with hail, risk of thunder and lightning. Seek shelter where possible.
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.
Thunderstorms
Bursts of rain, torrential downpours with hail, risk of thunder and lightning. Seek shelter where possible.
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
Sunday 30th August 2026
Last updated
Sat 29th Aug 26 at
4:30PM
Summary for all mountain areas
Areas of rain and low cloud around many mountains. Some drier periods in the morning, but into afternoon increasingly widespread heavy downpours and thunderstorms develop. Fairly light winds for much of the Highlands, becoming breezier England, stronger winds on Welsh mountains.
Headline for Brecon Beacons
Rain and increasingly thundery bursts. Wind strengthening.
How windy? (On the summits)
South-southwesterly 20-25mph early morning, strengthening, to often 30-35mph afternoon with some stronger gusts around showers.
Effect of the wind on you?
Increasingly blustery, ease of walking becomes affected, then more strenuous conditions, gusts knocking you off balance on exposed high areas; marked wind chill.
How Wet?
Rain most of day, heavy downpours; risk of lightning
Rain and drizzle in the morning, most persistent on southwestern hills, some heavier falls; drier for a time in east. Developing increasingly by middle of day onward into widely frequent heavy bursts of rain, risk of hail and thunder.
Cloud on the hills?
Fairly extensive, brief improvement
Fairly extensive from dawn, to middle slopes and locally lower to the south and west. Bases lift for a time, best breaks toward eastern mid-Wales, but filling back in as rain arrives, increasingly extensively.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, rare brief sun. Visibility varying, poor in rain, locally good if dry, mainly east in morning.
How Cold? (at 750m)
11 to 13C, will vary, and trend lower before evening. Feeling like 2 or 3C in strongest wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Monday 31st August 2026
Last updated
Sat 29th Aug 26 at
4:30PM
How windy? (On the summits)
Westerly 25 to 35mph, strongest morning up to middle of day, then tending to lessen gradually afternoon into evening.
Effect of the wind on you?
Blustery over hills, making walking uncomfortable on exposed high terrain, feeling rather cool.
How Wet?
A few showers
A scattering of showers for a few hours morning into middle of day, brief heavier moments, then fading to be largely dry. Patchy rain returns from west into night.
Cloud on the hills?
Lowest west in morning, breaks to tops
Covering hills fairly widely with some lower banks in western areas early in day. The base tending to rise higher and clear most hills middle of day into afternoon.
Chance of cloud free summits?
30% rising to 80%
Sunshine and air clarity?
Fairly cloudy, occasional sun breaking through; high cloud later builds. Visibility often very good, some haze west.
How Cold? (at 750m)
9 or 10C, little change all day. Feeling near to freezing directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 1st September 2026
Last updated
Sat 29th Aug 26 at
4:30PM
How windy? (On the summits)
West to southwesterly 20 to 25mph.
Effect of the wind on you?
Breezy, starting to affect ease of walking on exposed high tops, feeling cool.
How Wet?
Damp at times
Patchy drizzle and light rain most frequent west Wales. Smaller amounts further east.
Cloud on the hills?
Fairly extensive, lowest west
Banks of cloud often cap higher slopes above 600 to 800m, lowest and most persistent in western areas. Some breaks toward upper slopes in east Wales.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Largely cloudy, some brighter moments east Wales. Visibility often good below cloud, but reduced if in rain.
How Cold? (at 750m)
10 or 11C, rising a degree afternoon. Feeling like 3 to 5C in the wind on tops.
Freezing Level
Above the summits.
Planning Outlook
A generally unsettled outlook during the first two weeks of September with frequent rain and strong winds. Low pressure dominates and a series of frontal systems move in from the Atlantic. West to southwesterlies, often gale force over the mountains in the second half of this week. Heavy rain most prolonged in the west where increasingly wet underfoot, streams rising to be in spate. Low cloud often covering the hills. Temperatures varying, some notably cooler days for Scotland, at times more humid air mainly toward the south.