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
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
Hazy, some fog banks
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Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of cloud.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
Hazy, some fog banks
Visibility reduced around cloud banks, hazier on some lower slopes. Locally some improvements possible out of cloud.
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
Sunday 15th March 2026
Last updated
Sat 14th Mar 26 at
12:29PM
Summary for all mountain areas
Widespread rain - snow higher areas Scotland and finishing as snow higher summits elsewhere, will from the west clear (as temperatures drop) to squally hail and snow showers. Upland winds will be close to gale force, and although improving, still extensive low cloud.
Headline for Brecon Beacons
Upland wind near gale; rain, snow and fog.
How windy? (On the summits)
Morning: Southwest 45 to occasionally 55mph on higher tops. Easing a little toward midday. Afternoon: Westerly, after a slight lull, later 35mph - very gusty near precipitation.
Effect of the wind on you?
Continued difficult walking and wind chill significant on exposed higher areas. Expect balance to be tricky.
How Wet?
Rain; later clearing to showers
Morning: Extensive rain, though mostly lightened patchy north from Black Mountains. Middle of day or early afternoon: Clearing from west, but the rain finishing as sleet highest tops. Later: Occasional rain, hail or sleet showers
Cloud on the hills?
Hills covered morning; then cloud base rising markedly
Morning: Blanket of fog across the hills, breaks to 700m west Wales. Middle of day: Beginning to improve. Into afternoon: Varying cloud base, between 500m near precipitation and mostly 750 to 900m.
Chance of cloud free summits?
Less than 10% morning; later 80%
Sunshine and air clarity?
Dull and misty morning. Then improving to patchy sun (sunniest east Wales) and mostly very good visibility.
How Cold? (at 750m)
5C dropping to 2C afternoon. Will feel as cold as minus 8C where exposed to the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Monday 16th March 2026
Last updated
Sat 14th Mar 26 at
12:29PM
How windy? (On the summits)
Westerly; easing from 30 to sometimes 40mph on higher tops.
Effect of the wind on you?
Considerable wind chill and arduous walking. Balance may well be tricky.
How Wet?
Rain & drizzle frequently.
Possibly isolated showers after dawn before rain and drizzle spreads inland, most persistent west Wales. Total rainfall small particularly east Wales, north from Black Mountains.
Cloud on the hills?
Blanket of fog most or all day
Fog across most hills much of the day, but for a few hours (mostly morning) in east Wales, higher summits may clear. Otherwise, fog soon at or below 300-400m west Wales and south of the A40 (through Brecon) and by afternoon lowering to 450 to 600m elsewhere.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Becoming dull and misty from west - possibly very good visibility east Wales preceding the dull weather.
How Cold? (at 750m)
1C, rising marginally morning; then to 5C. Will feel as cold as minus 12C due to wind chill.
Freezing Level
Near highest tops at first, then above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 17th March 2026
Last updated
Sat 14th Mar 26 at
12:29PM
How windy? (On the summits)
Southerly 25 to 35mph, strongest Cambrian range.
Effect of the wind on you?
Considerable wind chill and walking sometimes arduous, mainly west Wales.
How Wet?
Risk drizzle, mainly or only SW Wales
Frequently or completely dry, but risk drizzle Preseli, possibly western Brecon Beacons.
Cloud on the hills?
Blanket of fog probably clearing most areas - perhaps not the SW
Preseli to western Brecon Beacons: Persistent fog, cloud base 300m, perhaps lower, to 550m; may break or become confined to Preseli. Elsewhere: Cloud covering the hills widely from dawn, but may well mostly or completely break up later morning or middle of day.
Chance of cloud free summits?
Rising to 70% by afternoon
Sunshine and air clarity?
Threat dull and murky most or all day SW Wales. Otherwise, pockets of sun, becoming widespread; visibility very good although a haze.
How Cold? (at 750m)
6C.
Freezing Level
Above the summits
Planning Outlook
An abrupt transition will take place on Tuesday and Wednesday. Areas of low cloud, drizzly rain and strong winds will continue to affect mainly western mountains until Wednesday. But then as pressure builds north of Britain it will become extensively fine; cloud often clearing, particularly western Britain, and temperature levels more varied - fairly warm some afternoons but frost widely at night.