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.
Wednesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
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.
Snow and hail showers
Periods of bright or sunny conditions mixed with showers or flurries of snow and hail. Visibility may change rapidly from excellent to very poor.
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
Wednesday 19th November 2025
Last updated
Tue 18th Nov 25 at
4:00PM
Summary for all mountain areas
Strong to gale-force northerly winds; severe chill factor on the mountains. Terrain widely frozen with fresh snow cover. Snow and hail showers frequent in the northern Highlands. Showers also north/west Wales. From the central Highlands into northern England, generally dry with sunshine and very clear air.
Headline for Brecon Beacons
Bitterly cold; wind up to gale force. Sunny, snow/hail far west.
How windy? (On the summits)
Northerly 40mph in morning, nearer 30mph afternoon.
Effect of the wind on you?
Challenging walking conditions on higher exposed terrain especially morning, very blustery all day; significant wind chill.
How Wet?
Becoming dry, local showers west
Patchy snow, sleet or rain lower slopes, from before dawn soon tending to break up to be dry most places. Locally toward Pembrokeshire, snow and hail showers remain frequent.
Cloud on the hills?
Lifting above many hills
Varied cloud over higher slopes early in the day, tending to lift and break up, leaving occasional patches over the tops.
Chance of cloud free summits?
60% rising to 90%
Sunshine and air clarity?
Fairly cloudy start, more sun develops with time. Visibility may start poor if in snow, but soon becoming excellent.
How Cold? (at 750m)
-2C. Wind chill feeling like -15C in stronger speeds.
Freezing Level
600m, slight rise into afternoon; also frost in some valleys after dawn, again soon from dusk.
Viewing Forecast For
Brecon Beacons
Thursday 20th November 2025
Last updated
Tue 18th Nov 25 at
4:00PM
How windy? (On the summits)
Northerly 30 to 40mph, speed fluctuating during day.
Effect of the wind on you?
Often challenging walking conditions on higher exposed terrain; significant wind chill.
How Wet?
Most of region dry
Local snow and hail showers confined to far west coast in Pembrokeshire. Otherwise likely dry all day.
Cloud on the hills?
Mostly very little
Rare fragments around some higher tops, but the hills largely clear.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Generally sunny. Visibility excellent.
How Cold? (at 750m)
-2C. Wind chill feeling like -15C in stronger speeds.
Freezing Level
500-600m, but frost into many valleys in morning, partial thawing lower sunlit slopes.
Viewing Forecast For
Brecon Beacons
Friday 21st November 2025
Last updated
Tue 18th Nov 25 at
4:00PM
How windy? (On the summits)
North-northwest 15-20mph at dawn, but likely soon less. Later turning W-SW'ly, increasing evening-night to 30-35mph.
Effect of the wind on you?
Mostly small during daytime, then likely to deteriorate from dusk onward.
How Wet?
Precipitation unlikely until night
Most likely all daytime dry. Into night, risk rain developing from west, snow on higher terrain for a time.
Cloud on the hills?
Likely none
Most hills likely clear all day. During afternoon, some patches may form on slopes near west coast.
Chance of cloud free summits?
90%
Sunshine and air clarity?
Sun through high cloud, tending to thicken from west, may become obscured later. Visibility excellent, possible mist or haze in some valleys.
How Cold? (at 750m)
-1C, slight rise to around 0C afternoon, then +2C into night.
Freezing Level
Much inland terrain frozen in morning, all day out of sunlight. General rise toward 700m; then into night above the tops.
Planning Outlook
Prepare for winter conditions - snow covering many mountains to lower slopes in Scotland, snow and ice cover varied for England & Wales, but much terrain frozen; hard frosts into inland valleys and glens the next couple of nights. Continuing strong northerlies into Thursday, showery snow and hail gradually fading from northwest Scotland. A front moving into Scotland from the west on Friday brings gales and snow, turning to rain lower down - in England & Wales more likely develops Friday evening-night. Less cold into the weekend, but higher mountains stay near or just below freezing, particularly Scotland; showers or locally more frequent upland snow over several days forward.