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.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
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 24th June 2026
Last updated
Tue 23rd Jun 26 at
4:23PM
Summary for all mountain areas
Extensive hot sunshine and unusually humid - beware sunburn and dehydration. England and Wales as well as east Scotland see early low patchy fog clearing; highest tops of east Scotland may be at or above the cloud layer at dawn. Some cloud clings to Scotland's west coast, breezy over far northern tops.
Headline for Brecon Beacons
Exceptionally hot and humid sunshine; some haze
How windy? (On the summits)
Variable 10mph or less most of the day. Later, trending east-southeasterly strengthening towards 10-15mph into/overnight.
Effect of the wind on you?
Negligible
How Wet?
No rain
Cloud on the hills?
Little if any
Some early fog patches in the valleys, an odd bank higher up, these lifting after dawn and soon dissipating for cloud-free hills.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive sunshine. May be quite hazy, though some improvement from the north.
How Cold? (at 750m)
22C rising toward an exceptionally hot and humid 25 to perhaps 27C.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Thursday 25th June 2026
Last updated
Tue 23rd Jun 26 at
4:23PM
How windy? (On the summits)
South to southeasterly between 15 and 25mph; perhaps gusty at times, risk stronger western hills, to 35mph.
Effect of the wind on you?
Fairly small, although there may be sudden buffeting at times both on higher areas and some lower slopes.
How Wet?
Small risk thunderstorms
Risk thunderstorms developing later afternoon giving locally torrential rain.
Cloud on the hills?
Little if any although patches may form near rain
Some patchy fog just at dawn, soon dissipating and extensively cloud free. Should thunderstorms occur, varied ragged patches reforming.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Periods of sunshine. Persistent haze.
How Cold? (at 750m)
Exceptionally warm 25 to 29C in afternoon, humid. Valley temperatures locally approaching 32 to 34C.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Friday 26th June 2026
Last updated
Tue 23rd Jun 26 at
4:23PM
How windy? (On the summits)
South-southwesterly 15-25mph; risk stronger early with strong gusts around showers.
Effect of the wind on you?
Fairly small, but notably breezy in the morning with early buffeting gusts starting to affect stability.
How Wet?
Risk early rain/thunderstorms
From before dawn, risk scattered bursts of heavy rain or thunderstorms. These likely drift north, and later afternoon may be largely dry.
Cloud on the hills?
May shroud high terrain much of the day
Other than some early ragged patchy cloud, the hills will be largely clear at dawn. Banks of cloud begin forming on upper slopes through morning, the lowest banks to 500m southern slopes for several hours, breaking somewhat later.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Some sun through high cloud, probably more overcast for a period. Visibility improves after morning haze lifts.
How Cold? (at 750m)
Starting near a hot and humid 21 to 23C, cooling to 17 to 19C with time, coolest west (perhaps 16C Preseli hills).
Freezing Level
Above the summits.
Planning Outlook
Exceptionally warm and humid most mountain areas until later Friday; valley temperatures approaching the low-to-middle 30s in England and Wales, with hill temperatures approaching the high 20s at least. Scotland will be slightly cooler, though temperatures will still reach the low 20s on many slopes. Scattered thunderstorms on Thursday and Friday, with a risk of extended torrential thunderstorms on Friday afternoon in northern areas. Over the weekend, progressively less warm as fronts begin to come in off the Atlantic, bringing a strengthening wind and bands of rain and low cloud, particularly affecting western mountains. Into the following week, Atlantic westerlies will dominate, with an indication of high pressure to the south producing dry and bright windows.