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
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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
Thursday 17th September 2026
Last updated
Wed 16th Sep 26 at
4:00PM
Summary for all mountain areas
Strong westerly winds, gales widely on Scottish mountains; cool air and significant wind chill factor. Showery rain with heavy bursts mixed in most frequent in western Scotland, but tending to extend eastward. Showers develop more often for northern England too. Fewer showers for Wales after early rain clears.
Headline for Brecon Beacons
Brisk winds, feeling cool; rain at first then passing showers.
How windy? (On the summits)
Westerly 25-30mph, easing towards 20mph for a few hours but also gusty, then rising a little again later.
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 southeast soon from 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, lingers just around dawn but will soon break up to just fleeting caps over highest tops, if any. A greater risk of banks over western high 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
Wed 16th Sep 26 at
4:00PM
How windy? (On the summits)
Westerly 25mph early morning, shifting SW'ly and strengthening, to a gusty 40-45mph into afternoon.
Effect of the wind on you?
Increasingly strenuous walking, deteriorating during day to make walking arduous; notable wind chill.
How Wet?
Rain develops, heavier west
The morning is largely dry, perhaps an odd drizzly spot in the west. Toward midday, rain arrives from the west, fairly persistent for a few hours, heaviest western hills, 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 600m, and to lower elevations southwestern areas.
Chance of cloud free summits?
40%, lowering to 10%
Sunshine and air clarity?
Patchy sunshine early in day, becoming cloudy and dull afternoon. 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.
Viewing Forecast For
Brecon Beacons
Saturday 19th September 2026
Last updated
Wed 16th Sep 26 at
4:00PM
How windy? (On the summits)
Southwesterly 30 to 40mph.
Effect of the wind on you?
Strenuous walking conditions on higher exposed areas, buffeting gusts in places. Considerable wind chill.
How Wet?
Mostly light showery rain
A band of persistent rain may linger over south Wales. Breaking up to become patchier, generally light, but risk still frequent rain and drizzle west.
Cloud on the hills?
Low cloud may persist
Risk of cloud shrouding the hills throughout the day, from low-mid levels upward on some south and west-facing slopes in rain. Bases may lift gradually, local breaks east.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, some glimpses of sun may emerge in east Wales. Hazy especially toward coasts, generally poor in rain, better east.
How Cold? (at 750m)
10 to 12C, trending slightly cooler later in the daytime. Feeling like 0C directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Sustained gale-force winds continue extensively on the mountains into the weekend, southwesterly turning westerly with time. Frequent rain over western hills, showers passing eastwards, tending to fade during Sunday as higher pressure begins to build from the south, allowing wind speeds to lessen too over England & Wales. Warmer into early next week, though higher humidity brings more cloud some drizzly rain to the west. A generally more promising forecast for late September as high pressure nearby offers drier and warmer weather for more places. Weather systems grazing past Scotland to the north still bring locally stronger winds and occasional rain mainly to the northwest.