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.
Monday'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.
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.
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.
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
Monday 14th September 2026
Last updated
Sun 13th Sep 26 at
4:18PM
Summary for all mountain areas
Humid southwesterly air brings extensive low cloud and drizzle to many mountains. Locally drier with some cloud breaks toward northeast of major mountain groups. Around Skye generally wet all day, whilst more prolonged heavier rain likely moves into southwest Scotland afternoon-evening. Strong and gusty winds.
Headline for Brecon Beacons
Blustery, gusty; low cloud, drizzle west and south.
How windy? (On the summits)
Southwesterly 25 to 40mph, speed tending to rise slightly during day, some notable strong gusts especially eastern downslopes.
Effect of the wind on you?
Some variations, but often affecting comfortable walking in exposure; with time increasingly frequent buffeting over the hills, very gusty in places affecting stability, not just highest terrain. Marked chill factor despite mild air.
How Wet?
Drizzly much of day southwest, some rain
Drizzle and light rain already fairly extensive from dawn, continuing onward throughout the daytime, staying generally damp on south and western hills. Patchier amounts eastward, but chance an odd burst of rain. Onward into night, heavier rain more widely.
Cloud on the hills?
Extensive very low cloud
Blanket cloud shrouding the hills, from lower slopes upward on south and western hills. Bases higher toward Brecon and the Black Mountains, some local breaks emerging especially afternoon toward eastern mid-Wales.
Chance of cloud free summits?
Below 10%
Sunshine and air clarity?
Overcast and dull, misty or murky to lower slopes in west and south, local brighter areas toward east-mid Wales.
How Cold? (at 750m)
15C, humid, little change all day, then starting to lower slightly into night. Feeling like 2 to 5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 15th September 2026
Last updated
Sun 13th Sep 26 at
4:18PM
How windy? (On the summits)
Westerly 20 to 30mph, possibly 35-40mph briefly early in day.
Effect of the wind on you?
Blustery across the hills, starting to affect comfortable walking on exposed high terrain and feeling increasingly cool.
How Wet?
Early rain then a few showers
A band of rain passing southeastward around dawn, briefly heavy. Drier for a time, then occasional showery rain develops, most common west Wales.
Cloud on the hills?
Mostly higher areas in morning
Fairly extensive across higher slopes at first, ragged patches from mid-slopes up, but soon breaking to leave patches over higher slopes, then increasingly clearing.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Occasional sun. Visibility mostly very good.
How Cold? (at 750m)
9 to 12C, mildest early in day, trending cooler during daytime. Feeling increasingly near 0C in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Wednesday 16th September 2026
Last updated
Sun 13th Sep 26 at
4:18PM
How windy? (On the summits)
Northwesterly 25-30mph, lessening and shifting westerly, 20mph and less for a time, later shifting southwesterly.
Effect of the wind on you?
Fairly small most of the day, though a blustery start in exposure.
How Wet?
A little drizzle and rain
Drizzly over the Cambrians to start, as well as the high Brecon Beacons with a little patchy rain drifting from the northwest. Both ease, for a largely dry afternoon.
Cloud on the hills?
Fairly extensive to start, lifting to tops
Cloud shrouds high terrain to start, fairly extensive over Cambrian, with patchy banks to middle slopes Brecon Beacons locally lower. Bases will lift, cloud breaks up somewhat, likely just patches over tops later in the day.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Patchy sun breaks out, mostly afternoon, high cloud from the west later. Good visibility.
How Cold? (at 750m)
8 to 10C, mildest east. Feeling like 1 to 3C in direct wind in the early hours, wind chill lessening.
Freezing Level
Above the summits.
Planning Outlook
Staying unsettled during the next week to 10 days as westerlies prevail - areas of low pressure passing north of Scotland with frontal systems bringing frequent rain, wettest over western mountains in Scotland. Often windy, sustained periods of gale-force westerly winds over higher terrain. Fairly cool by Tuesday onward, close to freezing on highest Scottish summits on Wednesday morning, possibly again for a time next weekend; often considerable wind chill on the mountains. Higher pressure and better weather tends to expand further north later in month.