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.
Tuesday'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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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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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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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
Tuesday 30th December 2025
Last updated
Mon 29th Dec 25 at
4:20PM
Summary for all mountain areas
Quiet but chilly conditions, light winds and plenty of sunshine for much of the Highlands, much terrain frozen, sub-zero all day over hills and in some glens. A cold east-northeasterly breeze England and Wales, strongest toward south; fairly cloudy, locally an odd snow flurry over the Pennines.
Headline for Brecon Beacons
Cold wind. Dry, patchy cloud, some sun best in west.
How windy? (On the summits)
East to northeasterly 20 to 25mph, up to 30mph early morning.
Effect of the wind on you?
Blustery particularly in the morning, but with marked wind chill all day on tops.
How Wet?
No precipitation expected
Cloud on the hills?
Patches confined to the east
Patches or banks covering tops in east Wales, but tend to lift off through day. Mostly clear in the west.
Chance of cloud free summits?
70%
Sunshine and air clarity?
Broken cloud and sun. The sun best in the west. Visibility very good or excellent.
How Cold? (at 750m)
-1C. Wind chill feeling like -8 to -10C.
Freezing Level
600-700m
Viewing Forecast For
Brecon Beacons
Wednesday 31st December 2025
Last updated
Mon 29th Dec 25 at
4:20PM
How windy? (On the summits)
North-westerly or variable 10mph or less at first, lifting to north-westerly 15 to 20mph through the day.
Effect of the wind on you?
Mostly small
How Wet?
No precipitation
Cloud on the hills?
Mostly little, other than patches.
Hills likely clear, bar a few ragged patches; mainly in the west later in the day.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Patchy cloud and sun, clouding over from west later. Visibility mainly very good or excellent.
How Cold? (at 750m)
-1C. Feeling closer to -8C in the strongest winds.
Freezing Level
All levels at first, following widespread frost into valleys, but lifting to 500-700m.
Viewing Forecast For
Brecon Beacons
Thursday 1st January 2026
Last updated
Mon 29th Dec 25 at
4:20PM
How windy? (On the summits)
West to northwesterly 25 to 35mph, squally gusts in showers.
Effect of the wind on you?
Strenuous walking in exposure on higher hills, buffeting gusts. Significant wind chill.
How Wet?
Showers, snow on tops
Showery spells moving southeastwards across the region, falling as snow above 600m, possible hail, more frequent western Cambrians for periods.
Cloud on the hills?
Sometimes covering tops
Patchy cloud drifting over higher slopes mostly west Wales above 600-700m, sometimes more widely in showers.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Fairly cloudy, occasional sun. Visibility very good, occasionally reduced in showers.
How Cold? (at 750m)
0 or -1C. Wind chill feeling like -10C.
Freezing Level
Up to dawn near to freezing to some lower slopes, then rising to 700-800m.
Planning Outlook
Significantly cold wintry conditions into the start of January. Air temperature well below freezing on high terrain, plus low minima into many glens and valleys with sustained hard frost. Strong northerly winds later this week giving severe wind chill. Frequent and heavy snow showers moving into northern areas and running down coastal extremities with significant accumulations. Elsewhere, lots of dry and sunny weather, although occasional organised bands of snow will feed south at times in the Arctic airflow. Staying cold into next week with scope for snowfalls more widely.