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.
Thursday'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.
Clear
Excellent or superb visibility, no navigation issues.
Cool to mild
Air temperature +5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Bright sunshine
Beware of sunburn from bright spring sunshine, despite feeling cool in the breeze on higher terrain.
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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.
Clear
Excellent or superb visibility, no navigation issues.
Cool to mild
Air temperature +5 to 10C on higher terrain. Comfortable temperatures on lower terrain, but feeling chilly if exposed to wind higher up, especially if stationary. Pack extra layers.
Bright sunshine
Beware of sunburn from bright spring sunshine, despite feeling cool in the breeze on higher terrain.
Viewing Forecast For
Brecon Beacons
Thursday 22nd May 2025
Last updated
Wed 21st May 25 at
4:30PM
Summary for all mountain areas
Rather cool northerly air, near freezing on high tops in N/NE Scotland all day; marked chill factor higher Cairngorms with a brisk breeze. Generally dry with good amounts of sunshine and very clear air. Early cloud and a little rain Pennine areas. Locally a shower forming in mid & south Wales.
Headline for Brecon Beacons
Cool, moderate breezes; patchy cloud and sunshine.
How windy? (On the summits)
Northwesterly 15-20mph, locally 25mph westernmost mountains. Turning northeasterly and easing a little in eastern areas.
Effect of the wind on you?
Fairly small, walking at times lightly impeded in the west.
How Wet?
Local showers afternoon
Spots of rain possible locally from thicker cloud by mid-morning, risk of local brief showers into the afternoon, primarily eastern areas.
Cloud on the hills?
Little or none
Hills largely cloud-free. Chance of mist in sheltered valley bottoms in the early morning.
Chance of cloud free summits?
90%
Sunshine and air clarity?
A patchwork of sunshine most of the day, cloud building a little from the northeast for a few hours. Excellent visibility.
How Cold? (at 750m)
8 to 10C. Feeling like 3C in the breeze.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Friday 23rd May 2025
Last updated
Wed 21st May 25 at
4:30PM
How windy? (On the summits)
West to northwesterly 15-20mph.
Effect of the wind on you?
Fairly small
How Wet?
No rain expected until into night
Overnight into Saturday, a little patchy rain develops from west.
Cloud on the hills?
Likely none
Chance of cloud free summits?
Above 90%
Sunshine and air clarity?
Mostly sunny, fair weather cloud building. High cloud arrives west, thickens towards evening. Excellent or superb visibility.
How Cold? (at 750m)
6C rising to 12C
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Saturday 24th May 2025
Last updated
Wed 21st May 25 at
4:30PM
How windy? (On the summits)
West turning southwesterly, 25 to 40mph, risk strengthening further later in day, possibly 50mph+ evening into night.
Effect of the wind on you?
Considerable buffeting across higher terrain, balance challenging on exposed ridges. May deteriorate further later.
How Wet?
Drizzly especially west
Generally feeling very damp all day in cloud, some periods of heavier drizzle on western hills; driest eastern areas. Risk heavier rain moving in from west evening into the night.
Cloud on the hills?
Extensive, very low cloud west/south
Blanket cloud from lower slopes up most or all day toward the coasts, 400-500m fairly widely inland, some higher breaks 600-700m toward the Black Mountains.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Rare if any glimpses of sun mainly easternmost areas. Generally overcast and dull, poor visibility across the mountains.
How Cold? (at 750m)
10C, little change all day. Feeling near freezing directly in the wind.
Freezing Level
Above the summits
Planning Outlook
A big change of weather pattern by the weekend as low pressure moves in from the Atlantic and southwesterly winds then prevail. By Friday evening-night, rain moves eastwards across all areas, amounts smaller toward the south Pennines and Wales. Blustery winds, low cloud, damp conditions for Saturday, then widely heavier rain is expected by Saturday night, accompanied by winds strengthening to gale force over many hills. Remaining very windy through Sunday and Monday with mountain gales; cooler too, with heavy showers, particularly frequent in western Scotland, a risk of hail and thunder. A changeable week ahead, some improvement likely later in the week.