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.
Monday's Forecast
Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
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.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
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Light wind, negligible impact
Little wind or walking hardly affected by the wind, but feeling chilly if exposed on tops. 10-15mph or less.
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.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Warm
Comfortable temperatures on the hills, 10 to 15C on tops, feeling pleasantly warm especially on lower ground. Beware of feeling cooler if exposed to wind on higher terrain.
Viewing Forecast For
Brecon Beacons
Monday 21st September 2026
Last updated
Sun 20th Sep 26 at
4:29PM
Summary for all mountain areas
Warm and humid air across the country brings low cloud shrouding hills extensively, foggy to some lower elevations in the west. Some rain moves east across Scotland then generally damp air with fairly persistent drizzle over western hills. Strongest winds toward northern Scotland, gusty not just on highest tops.
Headline for Brecon Beacons
Fairly light wind; drizzle, low cloud most persistent west.
How windy? (On the summits)
Westerly 15-20mph in morning, locally gusty, easing to 10-15mph or less.
Effect of the wind on you?
Breezy for a time, but becoming mostly small.
How Wet?
Local drizzle west
Some fine drizzle where in cloud, mostly western Cambrians and Pembrokeshire; mostly dry toward east Wales.
Cloud on the hills?
Low cloud most persistent west and southwestern hills
Blanket cloud shrouding many hills, fog from low-mid elevations up in the morning toward southwest, but for a few hours more east-mid Wales may be fully clear for a time, and cloud remaining patchy where it does form. Through afternoon, base lifting a little and some breaks forming, but western hills likely stay shrouded.
Chance of cloud free summits?
20% west, to 50% east.
Sunshine and air clarity?
Some sun mostly in east Wales and in morning. Misty poor visibility much of day southwestern hills, some variable improvements inland and east.
How Cold? (at 750m)
13 to 15C, little change into night; quite humid.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 22nd September 2026
Last updated
Sun 20th Sep 26 at
4:29PM
How windy? (On the summits)
South to southwesterly 10 to 15mph or less.
Effect of the wind on you?
Small.
How Wet?
Damp air mostly west
Fine drizzle where in cloud and on some lower slopes too toward west Wales. More often dry eastern areas.
Cloud on the hills?
Fairly extensive, lifting higher
Low cloud from many lower hill slopes upward and some fog banks into valleys too in the morning. Cloud tending to drift higher up and breaks forming gradually, soonest in east. Banks of cloud likely linger all day on south/western aspects.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, misty or hazy; glimpses of sun breaking through in places, mainly eastern valleys; some improvement during the day.
How Cold? (at 750m)
12 to 14C, humid; little change into evening and night.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Wednesday 23rd September 2026
Last updated
Sun 20th Sep 26 at
4:29PM
How windy? (On the summits)
Southwesterly 10-15mph, trending northwesterly 20-25mph, may further strengthen briefly.
Effect of the wind on you?
Fairly small, but speed and direction will vary, and quite blustery over the tops for a time afternoon.
How Wet?
Drizzly and patchy rain, clearing afternoon
Some drizzle on the high tops and patchy rain around in the morning. Rain may be more frequent for a few hours, but breaking up and moving east afternoon, to become dry later.
Cloud on the hills?
Often covering high terrain, breaking afternoon
Often cloudy above 600m through morning, some variability, and more extensive for a time, with ragged patches forming to forest canopies. Through afternoon, bases lift, increasingly breaking up, just banks over tops later if any.
Chance of cloud free summits?
30%, later rising to 70%
Sunshine and air clarity?
Glimpses of sun, breaking out afternoon, for a mostly clear sunset. Very good visibility out of cloud/rain.
How Cold? (at 750m)
Steady around 12 or 13C into afternoon, then cooling to finish around 9C.
Freezing Level
Above the summits.
Planning Outlook
Rain affects western Scotland on Tuesday, patchier rain extending eastward. Then into Wednesday, a heavier swathe of rain moves east, more likely over England & Wales, clearing from the west leaving a few showers. South-southwesterly winds increase again on Thursday and rain may move into western Scotland, but elsewhere is likely dry. A variable outlook continues into next weekend and just beyond with high pressure building from the south at times with fairly warm and dry conditions, but some Atlantic systems still pass to the north bringing occasional rain and showers toward western Scotland at least. A trend toward drier conditions more widely around the change of month.