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.
Friday'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.
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.
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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.
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.
Viewing Forecast For
Brecon Beacons
Friday 5th September 2025
Last updated
Thu 4th Sep 25 at
4:30PM
Summary for all mountain areas
West to southwesterly breezes feeling cool over the hills; strengthening winds in northwest Scotland later. A little light rain or brief showers passing eastwards, but often dry. Cloud often covering western tops, bases rising inland, better breaks to summits further eastwards, some sunshine.
Headline for Brecon Beacons
Breezy on hills. Passing light showers, cloud clearing tops.
How windy? (On the summits)
West turning southwesterly 15 to 20mph most of the day, increasing a little and become gustier in west later.
Effect of the wind on you?
Fairly small.
How Wet?
Light showers
Odd spots of drizzly rain drifting onto some slopes in west and south at first. Scattered brief light showers passing eastwards through middle of day.
Cloud on the hills?
Morning patchy cloud lifts off tops
At dawn, banks of cloud over high terrain, some patches forming lower on southern and west slopes. Cloud will lift and tend to break above most tops, occasional fleeting patches returning to tops.
Chance of cloud free summits?
40% rising to 80%
Sunshine and air clarity?
Bursts of sun, more widely east in morning; cloud filling in at times. Very good visibility.
How Cold? (at 750m)
8C rising to 10C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Saturday 6th September 2025
Last updated
Thu 4th Sep 25 at
4:30PM
How windy? (On the summits)
South turning southeasterly, 25 to 30mph, tending to increase, gusty 35mph higher tops, risk later in day 45-50mph.
Effect of the wind on you?
Blustery, strenuous walking exposed high terrain, buffeting gusts some upper slopes; later tending to deteriorate further.
How Wet?
Rain unlikely
Chance of a little light rain in Pembrokeshire early in day, otherwise dry.
Cloud on the hills?
Early cloud mostly south, clearing
Banks of cloud around slopes at varied heights early morning, some fog at dawn inland valleys. Patchy cloud may linger over some southern hills for a few hours, lifting to upper slopes, then largely dispersing.
Chance of cloud free summits?
50% rising to 90% by late morning.
Sunshine and air clarity?
Periods of sun, some high cloud at times covering the sky. Visibility very good after misty start southern areas.
How Cold? (at 750m)
11C rising to 15C afternoon-evening, but offset by increasing wind chill, feeling like 3 to 5C in exposure.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Sunday 7th September 2025
Last updated
Thu 4th Sep 25 at
4:30PM
How windy? (On the summits)
Southeasterly 45mph from dawn into early morning, stronger gusts high tops. Easing S-SW'ly 20-25mph afternoon.
Effect of the wind on you?
Difficult walking on exposed higher terrain early in day, some improvement, but still very blustery over tops.
How Wet?
Rain heavy for several hours
Rain persistent and heavy for several hours, particularly Brecon Beacons NP, risk thundery bursts extending northeastward. Likely to break up into showers and start to clear into the afternoon.
Cloud on the hills?
Extensive very low cloud, improving
Shrouding the hills extensively from 300-500m upward in rain in morning, lowest southern areas. Gradually bases rising, tending to lift and break during afternoon, though patches likely to linger on tops.
Chance of cloud free summits?
Below 10% morning, later 50%
Sunshine and air clarity?
Overcast and dull, murky poor visibility in rain. Tending to improve, perhaps some sun breaking through afternoon.
How Cold? (at 750m)
13C from dawn, rather humid in morning; dropping to a fresher 10C afternoon. Feeling near freezing in strongest wind.
Freezing Level
Above the summits
Planning Outlook
Briefly warmer with southerly winds increasing on Saturday, reaching gale-force later, ahead of a rain system arriving into Sunday, advancing northeastwards. Low pressure then continues to dominate for the foreseeable future, maintaining unsettled conditions widely next week. Expect areas of rain and heavy showers, risk of hail and thunder. Periods of gales over the mountains. West to southwesterlies prevail into mid-month, bringing frequent cloudy, showery conditions to western areas with fronts coming and going. Within this flow, centres of low pressure will bring heavier rain and stronger winds more widely at times. Eastern areas will see occasional brief dry and clear periods.