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.
Monday'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.
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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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.
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
Monday 22nd June 2026
Last updated
Sun 21st Jun 26 at
2:22PM
Summary for all mountain areas
Although high pressure will dominate - bringing high temperatures and sunshine to Wales and most of England, in the far north and across Scotland, high level cloud may bring rain for an hour or two, this leading to formation of low cloud that may be very slow to lift.
Headline for Brecon Beacons
Light wind; small chance of thunderstorm. Sunshine; very warm & humid.
How windy? (On the summits)
South to southeasterly between 10 to 15mph - local sudden gusts to 30mph near a thunderstorm.
Effect of the wind on you?
Mostly negligible
How Wet?
Risk of the odd shower or thunderstorm but extensively dry
Dry. most or all day Remote risk later afternoon of heavy rain in an isolated thunderstorm.
Cloud on the hills?
Very little for most of the day - may form in rain.
Generally the hills free of cloud although fog possible temporarily on higher slopes in rain.
Chance of cloud free summits?
Greater than 90%
Sunshine and air clarity?
Extensive sunshine. Visibility good, although a haze.
How Cold? (at 750m)
18 rising to 24C - very warm and also very humid indeed.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Tuesday 23rd June 2026
Last updated
Sun 21st Jun 26 at
2:22PM
How windy? (On the summits)
Southwesterly 15 to perhaps 25mph late in day,.
Effect of the wind on you?
Mostly negligible
How Wet?
Rain very unlikely
Cloud on the hills?
Little if any
Chance of cloud free summits?
Soon almost certain
Sunshine and air clarity?
Sunshine extensive, sometimes weak due to thin high level cloud. Good visibility although hazy.
How Cold? (at 750m)
19C rising to a very warm (and exceptionally humid) 24C.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Wednesday 24th June 2026
Last updated
Sun 21st Jun 26 at
2:22PM
How windy? (On the summits)
Direction may well vary, 10mph or less.
Effect of the wind on you?
Negligible
How Wet?
Rain not expected
Cloud on the hills?
Little if any
Chance of cloud free summits?
90%
Sunshine and air clarity?
Extensive sunshine. Persistent haze.
How Cold? (at 750m)
23C rising toward an exceptionally hot 25 to perhaps 28C.
Freezing Level
Above the summits.
Planning Outlook
A few days of often sunny and very warm weather. Some doubt remains about daytime temperatures - these possibly exceptionally hot on Wednesday (England and Wales) and Thursday (everywhere). The range in mountain temperatures given on Wednesday's forecasts reflects the uncertainty. Gradually less hot Friday and into the weekend; the change accompanied by thunderstorms in some areas.