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
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.
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.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
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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.
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.
Cool to mild
Air temperature 5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Viewing Forecast For
Brecon Beacons
Thursday 10th September 2026
Last updated
Wed 9th Sep 26 at
4:10PM
Summary for all mountain areas
Windy, gales over Scottish mountains and increasingly on higher tops of England & Wales. Rain starts patchy and light but becomes persistent over western hills, extending eastwards with time. Cloud capping most high tops, lowering in rain particularly in the west.
Headline for Brecon Beacons
Wind strengthens, later gales on tops. Rain develops.
How windy? (On the summits)
Southwesterly rising from 20-25mph at first, to 30mph middle of day, sustained 35-40mph during afternoon, soonest west, extending southeast; gusts may approach 50mph high tops. Lessening after dark.
Effect of the wind on you?
Fairly small early in day, but walking becomes strenuous, then arduous later afternoon in exposure on higher terrain, strongest gusts requiring effort to maintain stability; notable wind chill.
How Wet?
Patchy rain arrives, steadier rain spreads from west later
Spotty drizzly rain drifts onto the hills from the southwest, but often widely dry with some extended dry windows east. A larger band of rain sweeps in from the west later afternoon, setting in persistently over Brecon Beacons as evening approaches, some heavier falls for a time, fading to light showers after dark.
Cloud on the hills?
Varied over tops, later filling in
Cloud banks will variably lower onto the high summits, most frequent early in day on southern slopes, but clear windows likely as well; little cloud north of high Brecon Beacons. Cloud will lower and increasingly fill in from mid afternoon, soonest in west.
Chance of cloud free summits?
60%, later lowering to 20%
Sunshine and air clarity?
Occasional sun mostly eastern areas, high cloud builds, later cloudier from west. Good visibility, a little haze to the south.
How Cold? (at 750m)
8C rising to 11C by afternoon-evening, then little change into night. Feeling close to freezing as wind strengthens.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Friday 11th September 2026
Last updated
Wed 9th Sep 26 at
4:10PM
How windy? (On the summits)
Northwesterly 20mph to start, easing, to largely 10mph later. Tending to increase again well into night.
Effect of the wind on you?
Small; a little early breeze in exposure.
How Wet?
No rain expected
Cloud on the hills?
Early cloud lifts, increasing summits breaks
Most terrain above 700m starts shrouded, more extensively low Cambrians and western Brecon Beacons; southern slopes clearest of cloud. With time, a lifting trend, breaking up, to just banks rolling over summits and later more often clear.
Chance of cloud free summits?
Gradually rising to 70%
Sunshine and air clarity?
Sunshine increasingly breaks out, notably southern Brecon Beacons. Good visibility, though a haze building.
How Cold? (at 750m)
10 or 11C, beginning to cool slightly from the west later afternoon.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Saturday 12th September 2026
Last updated
Wed 9th Sep 26 at
4:10PM
How windy? (On the summits)
Southwesterly, generally rising during day 25 to 40mph.
Effect of the wind on you?
Increasingly strenuous walking conditions, strengthening gusts around high tops affecting balance.
How Wet?
Little rain until late, then may set in
Spots in the wind, but much of the region may see little rain over many hours. Later in the day, increasing risk of steadier then heavier rain developing from the northwest.
Cloud on the hills?
Varied, mostly west, risk lowering
Varied banks of cloud drift onto hills mostly in west, breaks to upper slopes for many hours in more eastern areas. Filling in and lowering with time from west.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Overcast, some brighter skies through high cloud. Visibility good, but some haze, reducing in rain.
How Cold? (at 750m)
10C rising to 13C. Feeling increasingly like 0C directly in wind.
Freezing Level
Above the summits.
Planning Outlook
Changeable west-southwesterlies prevail through mid September; often windy, gale-force winds for periods over higher terrain. A window of drier weather this Friday, then the next frontal system sweeps in overnight into Saturday with a sustained fall of rain moving southeastward, accompanied by upland gales for most places. Improving for better weather on Sunday, then wind and rain returns into Monday, staying showery into Tuesday. A mixed outlook likely continues later next week with rain most frequent in western Scotland. Temperatures varying, some cooler days especially in Scotland, but often fairly mild further south, at times quite warm and humid.