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
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
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
Wednesday 16th September 2026
Last updated
Tue 15th Sep 26 at
4:11PM
Summary for all mountain areas
Northwesterly wind pushes chilly air and showers into Scotland, milder but showery in Wales and west England. Wind lessens and showers increasingly scattering, a few light showery clusters here and there (total rainfall small). Rain and wind into west Scotland later, spreading widely overnight.
Headline for Brecon Beacons
Showers on and off, trending to fade with sun breaking out
How windy? (On the summits)
Northwesterly 20-25mph, lessening and shifting westerly, 15mph for a time, later shifting southwesterly, restrengthening to 25-30mph into evening, further strengthening overnight.
Effect of the wind on you?
Fairly small most of the day, though a breezy start in exposure, and becoming blustery again into evening.
How Wet?
Drizzle and some showers, fading
Drizzly over the Cambrians to start, as well as the high Brecon Beacons with showers drifting from the northwest. Both ease, becoming largely dry by late afternoon.
Cloud on the hills?
Fairly extensive to start, lifting to tops, increasingly breaking
Cloud over high terrain to start, fairly extensive Cambrians, with patchy banks to middle slopes of Brecon Beacons, locally lower where sheltered. Bases will lift, cloud breaks up somewhat, likely just patches over tops from midday and increasingly breaking up later.
Chance of cloud free summits?
30% rising to 60%
Sunshine and air clarity?
Patchy sun breaks out, some extensive sunny windows, then thin high cloud builds from the west later in the day. Good visibility.
How Cold? (at 750m)
8 to 10C, mildest east. In strongest late wind, feeling like 1 to 3C.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Thursday 17th September 2026
Last updated
Tue 15th Sep 26 at
4:11PM
How windy? (On the summits)
Westerly 25-30mph, easing towards 20mph for a few hours but also gusty.
Effect of the wind on you?
Blustery in exposure much of the day, buffeting gusts and a chilly feeling.
How Wet?
Scattered showers
A broad area of rain from overnight clears away to the east just around dawn for a day of light scattered showers. Many hills will see extended dry windows and total rainfall amounting to little.
Cloud on the hills?
Little expected
Cloud fairly extensive over high terrain before sunrise, may linger just around dawn but will soon break up to just fleeting caps over highest tops, if any. A greater risk of banks over tops for a few afternoon hours.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Mostly sunny, a little fair weather cloud. Very good visibility.
How Cold? (at 750m)
8 or 9C. Feeling just above freezing in strongest direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Friday 18th September 2026
Last updated
Tue 15th Sep 26 at
4:11PM
How windy? (On the summits)
Westerly 20-25mph, shifting southwesterly and strengthening, to a gusty 35-45mph later.
Effect of the wind on you?
Increasingly strenuous walking, more arduous moments later in considerable buffeting with wind chill.
How Wet?
Rain from midday
The morning is largely dry, perhaps an odd drizzly spot in the west. From midday, rain arrives from the west, may set in for a few hours, then rain on-and-off into nighttime.
Cloud on the hills?
Covering high tops, becoming extensive
High terrain begins in cloud, lower patches here and there, lifting towards tops but summits more often covered than clear of cloud. As rain arrives afternoon, blanket cloud fills in towards 600-700m, and lower southwestern areas.
Chance of cloud free summits?
40%, lowering to 10%
Sunshine and air clarity?
Patchy sunshine, becoming cloudy and later dull. Hazy at best, visibility deteriorating afternoon.
How Cold? (at 750m)
8 to 10C, trending higher and rising further into night. Feeling like 0C in direct wind.
Freezing Level
Above the summits.
Planning Outlook
Showers and strong westerly wind prevails from Thursday into the weekend - areas of low pressure passing north of Scotland with frontal systems bringing bands of rain, followed by showers, wettest over western mountains in Scotland. Periods of gale-force winds over higher terrain, cool temperatures with significant wind chill, particularly in the north where temperatures will occasionally approach freezing point on high Scottish tops. Showers generally more scattered in England and Wales, most showers in the west; bright spells too, but bands of rain and low cloud will pass these areas. Mild temperatures, at times warm south Pennines and Wales. Milder, more settled weather is indicated next week, though sometimes breezy in Scotland, spells of rain in the west.