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
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Hot
Heatwave conditions. Very high temperatures, rising to 20C+ on high tops, approaching 30C in some valleys. Beware of heat stroke and dehydration. Carry plenty of liquid.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
Dry and sunny
Extensive sunshine. The mountains free of cloud once any early mist patches disperse.
Hot
Heatwave conditions. Very high temperatures, rising to 20C+ on high tops, approaching 30C in some valleys. Beware of heat stroke and dehydration. Carry plenty of liquid.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Brecon Beacons
Wednesday 12th August 2026
Last updated
Tue 11th Aug 26 at
3:50PM
Summary for all mountain areas
Blustery on high terrain in Scotland, gusts pushing downslope in places. Scattered showery rain in the west, a few heavy bursts; some showers push east with time. Dry with hot sun and little wind for England and Wales, just some patchy high cloud in the north; beware risk of sunburn and dehydration.
Headline for Brecon Beacons
Hot and sunny; risk sunburn and dehydration
How windy? (On the summits)
Southerly 10-15mph; strongest breezes early and late in the day will approach 20mph.
Effect of the wind on you?
Negligible most of the day.
How Wet?
No rain expected
Cloud on the hills?
No cloud expected
Chance of cloud free summits?
Practically certain
Sunshine and air clarity?
Extensive sunshine. Good visibility although a haze.
How Cold? (at 750m)
18C rising to 25 or 26C. Valley temperatures will rise up to 33C, hottest temperatures most likely towards the east. Only small drop overnight.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Thursday 13th August 2026
Last updated
Tue 11th Aug 26 at
3:50PM
How windy? (On the summits)
Southerly 20mph early, easing and shifting westerly, 10-15mph.
Effect of the wind on you?
Small.
How Wet?
Most likely dry
Small chance a few spots of rain but more likely dry.
Cloud on the hills?
Little if any
A rising chance of cloud banks arriving onto south and west slopes late in the day, not necessarily on the summits.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Periods of sunshine - sometimes through high level cloud. Hazy.
How Cold? (at 750m)
Reaching an unusually warm 24 to perhaps 27C, hottest east; valley temperatures locally to 32C.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Friday 14th August 2026
Last updated
Tue 11th Aug 26 at
3:50PM
How windy? (On the summits)
Westerly 10-15mph. Later, shifting northwesterly and strengthening somewhat.
Effect of the wind on you?
Small.
How Wet?
Patchy rain and drizzle
From dawn, light patchy rain affects many hills with a drizzle on high tops and western hills. Rain will become more frequent with heavy bursts for a few hours, at least.
Cloud on the hills?
Fairly extensive
From dawn, cloud banks likely cover the high tops, the lowest and most extensive cloud to the west. With time, cloud becomes sheet-like over most high terrain and will lower towards middle slopes as rain arrives, or lower western slopes.
Chance of cloud free summits?
50% lowering to 20%
Sunshine and air clarity?
Early glimpses of sun will give way to overcast conditions and largely poor visibility.
How Cold? (at 750m)
18 or 19C, beginning to lower from the west, finishing near 16C (though warmer east).
Freezing Level
Above the summits.
Planning Outlook
Thursday remains dry and exceptionally hot across England and Wales; very dry ground conditions. Rain will begin to spread across Scotland through Thursday, this slipping into England and Wales on Friday and bringing a fresher breeze with its passing. Though weekend, high pressure is never far away to the southwest, keeping conditions generally drier and brighter across England and Wales, though a northwesterly flow will bring some cloud to western hills. Scotland is more often cloud with patchy rain in the north and west. Mixed conditions early next week with patchy rain and sunny bursts here and there. With time, a trend towards stronger westerly winds with a few spells of more widespread rain; forecast confidence is low beyond the weekend.