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.
Sunday's Forecast
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
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.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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
Sunday 14th December 2025
Last updated
Sat 13th Dec 25 at
4:15PM
Summary for all mountain areas
Extensive rain, sustained heavy falls over many western mountains, expect flooding. Smaller amounts of rain toward the N/E Cairngorms, also S/E Wales and Peak District. Widespread gales, powerful gusts around high tops, locally downslope to east. Blanket cloud across hills, lowest in west.
Headline for Brecon Beacons
Gales strengthening. Patchy rain, low cloud.
How windy? (On the summits)
Southwesterly, 45-55mph, powerful gusts downslope to middle slopes, tending to strengthen during daytime, gusts 60-65mph.
Effect of the wind on you?
Arduous conditions over the hills. Strong gusty winds will challenge balance and stability all day, including less exposed slopes. Significant wind chill.
How Wet?
Some fine drizzle and patchy rain west
Some fine drizzle in fog on high terrain, pulses of steadier drizzly rain pushing in from the west, but little reaching east and southeastern areas, substantially dry for periods.
Cloud on the hills?
Covering high tops, lowest bases south/west
The high western tops likely in fog most or all day. During rain, bases will lower, most significantly on southern aspects, locally down to 500m. Better chance of breaks east and mid-Wales.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Rare glimpses of sun east; mostly dull with haze toward west/south. Better visibility eastward, good where dry and out of cloud.
How Cold? (at 750m)
5 or 6C; little change with added height above 600m. Feeling like -5 to -8C in direct wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Monday 15th December 2025
Last updated
Sat 13th Dec 25 at
4:15PM
How windy? (On the summits)
Southwesterly 30-40mph possibly much of the day, powerful gusts in places.
Effect of the wind on you?
Strenuous walking, very gusty, affecting balance on exposed terrain; feeling chilly.
How Wet?
Rain most of the day, heavy southwest
Often raining widely, most persistent western slopes where heavy falls may be prolonged. A chance of some breaks east through these fleeting. Very wet underfoot, streams rising to be in spate or flood.
Cloud on the hills?
Fairly extensive
Shrouding the hills with variable banks to mid or some lower slopes at times south and west of Brecon.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast and dull. Visibility mostly poor due to rain.
How Cold? (at 750m)
5C. Feeling like -5C in strongest early wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Tuesday 16th December 2025
Last updated
Sat 13th Dec 25 at
4:15PM
How windy? (On the summits)
Northwesterly 10 to 20mph.
Effect of the wind on you?
Fairly small.
How Wet?
Largely dry
Remnants of overnight rain may linger up to dawn, likely to clear eastward. Chance of an odd light shower near coast. Very wet underfoot following previous heavy rain, streams in spate, flooding.
Cloud on the hills?
Patches higher and western tops
Patchy cloud banks most common west Wales, may come and go above 600m toward Cardigan Bay. Some varied banks possible elsewhere from dawn, but largely clearing inland and eastwards.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Early cloudy skies, gradually high cloud tending to thin to reveal some sun, soonest in west. Visibility increasingly excellent.
How Cold? (at 750m)
3C. Feeling like -3C directly in the breeze.
Freezing Level
Above highest summits. Slight frost sheltered valleys in morning.
Planning Outlook
Prolonged rain will leave flooding of streams and rivers in many mountain areas early in the new week, with the exception of northeastern Scotland. A frontal system will eventually pass eastwards Monday-Tuesday, wind easing; dropping to freezing above 900m, beware of ice forming on higher Scottish mountains. Drier conditions for many on Tuesday, though showery near west coast of Scotland. By Wednesday, another system sweeps in from the Atlantic bringing further rain and gales. A risk of more heavy rain particularly England and Wales later in the week. A change of weather pattern is likely in the run up to Christmas, as high pressure builds northward, bringing drier weather, possibly chillier with time.