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.
Friday'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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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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.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Brecon Beacons
Friday 12th December 2025
Last updated
Thu 11th Dec 25 at
3:43PM
Summary for all mountain areas
Increasingly blustery north England and Scotland, gales over Scottish Highlands; lighter wind Pennines and Wales. Early patchy rain over east Scotland and the Pennines soon clears, slowest south Pennines; many hills then cloud-free. Scattered showers onto west coasts, most frequent and heavy west-central Scotland.
Headline for Brecon Beacons
Some showers south and west; often clear north slopes
How windy? (On the summits)
Westerly 20-25mph most of the day; some variable direction, in the morning.
Effect of the wind on you?
Fairly small, but winds may be uncomfortable at times in exposure.
How Wet?
A few showers, mostly south and west slopes
Patchy rain on eastern hills at dawn soon clears. Scattered showers drift onto southern slopes, mostly west of Merthyr Tydfill.
Cloud on the hills?
Mostly high tops and west slopes
Extensive cloud before dawn soon breaks, a few ragged patches leftover at various elevations though these fading. Caps will come and go over high terrain, most frequent and prolonged on southern slopes, particularly in the west.
Chance of cloud free summits?
40%; 60% eastern hills
Sunshine and air clarity?
Cloudy skies early break, best of sun on northern slopes though weakened by high cloud. Excellent visibility early, a haze building near the coasts.
How Cold? (at 750m)
Up to 6C on eastern mountains around dawn, soon widely 4C most of the day. Feeling below freezing in direct wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Saturday 13th December 2025
Last updated
Thu 11th Dec 25 at
3:43PM
How windy? (On the summits)
Southwesterly, strengthening during daytime from 25-35mph to 45mph, risk stronger gusts toward evening.
Effect of the wind on you?
Increasingly strenuous walking conditions on higher terrain, more arduous later in day; considerable wind chill.
How Wet?
Little or no rain
Patchy spots of rain or drizzle, most common western areas, whilst substantially dry more eastern hills. A risk of more frequent rain overnight.
Cloud on the hills?
Varied over tops
Cloud banks drifting over higher tops, most frequent on hills toward south and west. Higher base further east and into mid-Wales, above tops for periods.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Early sunshine north, high cloud gradually building through the day. Hazy west, visibility reduced in rain, but more often good toward east.
How Cold? (at 750m)
3 or 4C, tending to rise a little later in day, 6C overnight. Wind chill feeling near to -10C.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Sunday 14th December 2025
Last updated
Thu 11th Dec 25 at
3:43PM
How windy? (On the summits)
A gusty southwesterly, sustained winds between 45-55mph, may strengthen further. Gusts to middle slopes.
Effect of the wind on you?
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
Some fine drizzle in fog on high terrain, at times falling as patchy rain. May become more frequent, particularly west, but remaining patchy during daylight.
Cloud on the hills?
Mostly high tops and south aspects, sometimes lower
The high tops likely in fog most or all day. During rain, bases will lower, most significantly on southern aspects, locally down to 500m. Northern slopes more often clear.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Little or no sunshine; dull on the high tops with haze near the south coast. Better visibility low slopes.
How Cold? (at 750m)
5 to 7C, variable. Little change with added height. Feeling like -5 to -8C in direct wind.
Freezing Level
Above the summits
Planning Outlook
Staying unsettled through the weekend and next week as southwesterly winds prevail and low pressure systems pass to the northwest of Scotland; sustained gales over the mountains, severe or stormy for periods. Rainfall will be frequent and heavy for periods, sometimes showery with hail in the west. Expect very wet ground conditions and further flooding of streams and some rivers. Best chance for dry and bright periods central and south Pennines, though these fleeting. Mild for the time of year, temperatures only just below freezing intermittently on higher Scottish tops, even here will experience spells above freezing with thawing, any lying snow patchy, but beware some icy surfaces on the very highest tops where some refreezing occurs.