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
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
Hazy, some fog banks
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Hazy views with lack of air clarity, particularly on lower terrain, some fog banks on hills making navigation locally more difficult. If above an inversion, the air outstandingly clear.
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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Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
Hazy, some fog banks
Hazy views with lack of air clarity, particularly on lower terrain, some fog banks on hills making navigation locally more difficult. If above an inversion, the air outstandingly clear.
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 23rd November 2025
Last updated
Sat 22nd Nov 25 at
5:42PM
Summary for all mountain areas
Low pressure will dominate the weather bringing areas of strong winds, rain (or snow on higher areas) and extensive fog to the hills - whiteout in places mainly southern Highlands. Windiest in Wales where upland gales will strengthen, whilst least windy S Scotland.
Headline for Brecon Beacons
Showery rain; upland wind strengthening to gale.
How windy? (On the summits)
Westerly, 30 to perhaps 35mph morning, but gradually strengthening 40 to on highest tops 50mph by dusk.
Effect of the wind on you?
Significant wind chill and arduous or difficult walking, particularly afternoon.
How Wet?
Heavy showers
Rain overnight soon clearing. Then showers, some heavy with hail and low risk thunder.
Cloud on the hills?
Extensive on higher tops
Cloud base varied, but widely covering hills above 500-800m, lowest near to west coast, where near showers temporarily forming on lower slopes.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Glimpses of sun, mainly east Wales. Hazy, and visibility poor in precipitation.
How Cold? (at 750m)
2C. Will feel like -12C directly in the wind later in the day.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Monday 24th November 2025
Last updated
Sat 22nd Nov 25 at
5:42PM
How windy? (On the summits)
Northerly, 25 to 30mph.
Effect of the wind on you?
Will impede ease of walking across the hills, and at times in gusty conditions, balance may be tricky and wind chill considerable.
How Wet?
Little or perhaps no precipitation
Intermittent rain overnight will continue into daylight, but will amount to little and through morning ease to just a few showers in west Wales.
Cloud on the hills?
Cloud base rising - probably clearing higher summits
Morning: cloud shrouding higher areas extensively. Gradually cloud base rising toward 750 to perhaps 900m.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Patches of sunshine slowly coming through. Visibility very good or perhaps in afternoon excellent.
How Cold? (at 750m)
Around 2C - a marginal drop likely through the day Will feel as cold as minus 5C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 25th November 2025
Last updated
Sat 22nd Nov 25 at
5:42PM
How windy? (On the summits)
Northerly 25mph gradually easing to 15mph.
Effect of the wind on you?
Becoming small
How Wet?
Little or no precipitation
Showers, mainly Preseli hills.
Cloud on the hills?
Mostly or all clearing the summits
Patchy cloud above 500 or 600m west Wales and 800m elsewhere.
Chance of cloud free summits?
80%
Sunshine and air clarity?
Bright sunshine. Very good or excellent visibility.
How Cold? (at 750m)
1C
Freezing Level
Around 900m; may rise slowly through day. Frost some valleys morning.
Planning Outlook
After a brief burst of cold air on Monday and Tuesday winds will turn westerly. It will be milder with a week or more frequent rain and upland gales, particularly on western mountains. In Scotland, temperatures on the Munros will sometimes be below freezing point, but fresh snow transient, whereas elsewhere, snow rare, if any.