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
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 strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Warm
Comfortable temperatures on the hills, rising above 10C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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 strong warm sunshine. The mountains free of cloud once any early mist patches disperse.
Clear
Excellent or superb visibility, no navigation issues.
Warm
Comfortable temperatures on the hills, rising above 10C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Brecon Beacons
Saturday 17th May 2025
Last updated
Fri 16th May 25 at
3:55PM
Summary for all mountain areas
Strong sunshine for the Highlands, Lakes and much of Wales all day; beware sunburn. Cloudy for the Pennines to the Borders in the morning, gradually dispersing to give sunshine into afternoon; feeling cool here with a fresh NE'ly breeze, strong and gusty in the morning. Warmest in western Scotland.
Headline for Brecon Beacons
Largely sunny, cool start, becoming fairly warm. Gusty in places.
How windy? (On the summits)
East to northeasterly 10-20mph, strongest around dawn and dusk. Notable gusts on high terrain and downslope in the south for a time, up to 25mph.
Effect of the wind on you?
Fairly small though often gusty, perhaps some stability challenges in strongest gusts.
How Wet?
No rain
Cloud on the hills?
None west, soon clear east
Patches of cloud on some eastern slopes early in the day, soon all dispersing.
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive strong sunshine after early cloud disperses in east. Soon excellent visibility.
How Cold? (at 750m)
8C, rising to 13C
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Sunday 18th May 2025
Last updated
Fri 16th May 25 at
3:55PM
How windy? (On the summits)
North-northeasterly 10-15mph.
Effect of the wind on you?
Negligible
How Wet?
Little or none
Small chance toward evening of an isolated shower inland.
Cloud on the hills?
Not expected
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Extensive warm sunshine. Some high cloud builds later in the day. Excellent visibility.
How Cold? (at 750m)
9C rising to 13C
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Monday 19th May 2025
Last updated
Fri 16th May 25 at
3:55PM
How windy? (On the summits)
Easterly 15 to 20mph, in places gusty 25mph, mainly morning.
Effect of the wind on you?
Fairly small, but feeling chilly where exposed especially morning, gusts may make walking uncomfortable locally.
How Wet?
Risk showery rain, possible thunder
An odd spot of rain from time to time, locally a heavier burst. Some uncertainty, but may develop later in day widely into slow-moving areas of showery rain, chance of an isolated thunderstorm; hit and miss.
Cloud on the hills?
Only if rain occurs later
If showers occur, cloud banks forming and lowering onto tops, patches may form in places to lower elevations for periods.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sunshine best in morning, cloud bubbling up during the day, may fill in later inland. Visibility excellent.
How Cold? (at 750m)
7C rising to 12C afternoon; lowering a few degrees if showers develop.
Freezing Level
Above the summits
Planning Outlook
High pressure remains to the north into early next week, easterly breezes prevailing. A few showers are possible mainly England and Wales. Warm sunshine most abundant in western Scotland. A change in the weather pattern is expected from midweek as pressure generally falls, bringing a greater risk of showers or areas of rain - a more unsettled outlook onward into next weekend with cooler temperatures, often stronger winds and cloud shrouding the hills for periods. In the short-term, ground conditions remain extensively dry, water courses are very low and the fire risk is very high.