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.
Saturday'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.
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.
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
Saturday 19th September 2026
Last updated
Fri 18th Sep 26 at
4:00PM
Summary for all mountain areas
Challenging conditions over high terrain with gale-force winds extensive; feeling notably cold in exposure. Showery rain, most frequent western Scotland. Persistent rain for Wales tends to clear southward and the strongest winds will lessen here.
Headline for Brecon Beacons
Windy, lessening. Rain and low cloud in morning, improving.
How windy? (On the summits)
Southwesterly 30 to 40mph, strongest in the morning, easing during day to 25mph afternoon.
Effect of the wind on you?
Strenuous walking conditions on higher exposed areas, buffeting gusts in places with considerable wind chill. Moderating, but still feeling breezy on tops in afternoon.
How Wet?
Rain and drizzle mostly morning
A mix of drizzle and some steadier rain in the morning, at times heavier in southwest early in day, fading to patchier rain through the middle of the day, more often dry into afternoon, odd light showers.
Cloud on the hills?
Low cloud in morning, then lifting, breaks form to tops
Shrouding the hills most extensively in the morning, from low-mid levels upward on some south and west-facing slopes in rain. Bases lift gradually, toward upper slopes with breaks in east, then more widely afternoon.
Chance of cloud free summits?
20% rising to 60%
Sunshine and air clarity?
Largely cloudy morning, occasional sun emerges with time, best in east Wales. Hazy especially toward coasts, generally poor in rain in morning, better east; improving to become good.
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.
Viewing Forecast For
Brecon Beacons
Sunday 20th September 2026
Last updated
Fri 18th Sep 26 at
4:00PM
How windy? (On the summits)
Westerly 25-30mph early morning, easing to 15-20mph.
Effect of the wind on you?
Blustery and rather cool early in the day, but moderating to be fairly small.
How Wet?
Risk becoming drizzly west
Local drizzly showers possible over west Wales early in day fading. Some drizzle may return across western hills during the afternoon.
Cloud on the hills?
Lifting for a time, then lowering again
Patchy cloud grazing higher slopes above 700-800m in the morning, mostly in west. Tending to thin and break above the tops for a time, but then lowering cloud may well fill in again from the southwest afternoon.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Varied high cloud likely thickens to cover the sky, becoming overcast, risk dull west. Slight haze west and south, very good visibility eastern hills.
How Cold? (at 750m)
7C rising to 9C, then tending to rise further onward into night. Feeling close to 0C in early wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Monday 21st September 2026
Last updated
Fri 18th Sep 26 at
4:00PM
How windy? (On the summits)
Westerly 20-25mph early in day, some gusty slopes, but speeds tending to lessen during day to 10-15mph or less.
Effect of the wind on you?
Breezy for a time, but becoming mostly small.
How Wet?
Local drizzle
Some fine drizzle where in cloud, mostly western Cambrians; drier toward south and east Wales.
Cloud on the hills?
Lowest and most persistent west
Blanket cloud shrouding many hills, foggy from low-mid elevations up in the morning. Some highest tops may be near top of the cloud sheet. Cloud may slowly thin and lift, but western hills unlikely to clear.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Some sun mostly develops in east Wales. Misty poor visibility over hills, some improvement may develop in east, hazy then perhaps very good later.
How Cold? (at 750m)
13 to 15C, little change into night; quite humid.
Freezing Level
Above the summits.
Planning Outlook
Improving on Sunday as gale-force winds on Scottish mountains gradually lessen and showers become fewer. Warm and humid into early next week, on Monday extensive low cloud and drizzly rain particularly in the west. High pressure to the south will generally dominate the extended outlook particularly for England & Wales with more often drier and warmer conditions through late September into early October. Fine weather likely extends across Scotland for periods too, but a more changeable autumnal mix may continue especially further northwest with rain and stronger winds at times.