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
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Sunshine and showers
A good amount of dry and bright weather, but scattered bursts of rain, some may be locally heavy.
Cold
Air temperature below 0C all day on higher mountains. Significant chill factor if exposed to strong winds. Suitable protective clothing required.
Viewing Forecast For
Brecon Beacons
Friday 19th December 2025
Last updated
Thu 18th Dec 25 at
4:25PM
Summary for all mountain areas
Southwesterly gales, severe across the Highlands, giving significant wind chill and showers. Showers frequent western Scotland, with snow falling down to 800m with hail and risk lightning. Scattered showers for England and Wales where hill fog confined to western tops.
Headline for Brecon Beacons
Windy with a considerable wind chill. Passing showers and sun.
How windy? (On the summits)
Southwesterly 30 to 45mph, tending to lessen a little during day.
Effect of the wind on you?
Strenuous walking conditions over higher terrain, buffeting in exposure mainly morning. Considerable wind chill.
How Wet?
Brief showers
A few showers coming inland from the west in the morning, possible hail, briefly snow on highest summits. Fading into afternoon.
Cloud on the hills?
Breaks to many tops
Patchy cloud grazing higher tops, most often western hills in morning, lifting above most tops for periods.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Sun most frequent east Wales. Visibility often very good.
How Cold? (at 750m)
1 to 3C. Feeling like -10C directly in the wind.
Freezing Level
Just above highest tops, tending to rise slightly higher.
Viewing Forecast For
Brecon Beacons
Saturday 20th December 2025
Last updated
Thu 18th Dec 25 at
4:25PM
How windy? (On the summits)
South to south-easterly 25 to 40mph, but up to 50mph for a time hills west of Brecon.
Effect of the wind on you?
Walking arduous, or near west coast difficult, with a very turbulent airflow. Significant wind chill and buffeting.
How Wet?
Patchy rain, becoming persistent from west.
Patches of rain or drizzle here and there, may well become increasingly persistent from the west coast as front edges in. Particularly in the afternoon.
Cloud on the hills?
Extensive
Extensive cloud covering the hills through the day, with the lowest bases as the rain moves in.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Very likely overcast. Visibility good at times, but poor in rain.
How Cold? (at 750m)
3 or 4C
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Sunday 21st December 2025
Last updated
Thu 18th Dec 25 at
4:25PM
How windy? (On the summits)
Easterly 25 to 40mph
Effect of the wind on you?
Very blustery, gusty winds, with sudden, strong gusts running downslope from ridges and passes. Significant wind chill.
How Wet?
Rain may become heavier and persistent
Patches of rain or drizzle at first, but through the day a batch of heavier and more persistent rain may well spread up from the south.
Cloud on the hills?
Widespread, especially in rain
Hill fog will very likely be extensive across the hills through the day. Best of any breaks will be toward the west coast.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Extensively dull. Visibility perhaps good at times, but marked haze and poor when in rain.
How Cold? (at 750m)
Around 3 or 4C
Freezing Level
Above the summits
Planning Outlook
A switch to east-southeasterly winds by Sunday into early next week, some residual rain and high-level snow, but a drier and colder theme develops into the Christmas period and perhaps into the New Year, as high pressure builds to the north and northeast. An extensive cloud sheet will likely come in from the North Sea over many days with light snow showers or flurries likely, rain to lower slopes, but many areas dry. Best breaks in the west.