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.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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
Tuesday 9th September 2025
Last updated
Mon 8th Sep 25 at
4:13PM
Summary for all mountain areas
Windy near west coasts of Scotland and Wales, risk of gales over high tops later in the day; local cloud and light morning rain, then dry and largely clear. Some morning light rain and cloud for Lakeland too, also clearing. Mostly clear hills east Scotland though blustery. Mostly sunny and warm along the Pennines.
Headline for Brecon Beacons
Most summits clearing through morning; increasingly windy
How windy? (On the summits)
Southerly 25-30mph, more southwesterly around dawn. Rising towards 30-35mph afternoon, always windiest on western hills where gusts over tops reach 40mph at times.
Effect of the wind on you?
Uncomfortable winds will increasingly affect stability through afternoon, strenuous conditions on high terrain later in the day. Feeling cool.
How Wet?
Occasional spots of rain, mostly south and west
Some drizzly rain on southern aspects in the morning, most likely western hills. Rain will largely fade, though a risk of some showery rain on to westernmost hills later in the day.
Cloud on the hills?
Clearing most summits
From dawn, local fog patches in sheltered valley bottoms, variable patches upslope; high tops likely in cloud. Cloud will lift and break for clear tops in the east. Some patches remain on western high tops, may deteriorate here later in the day.
Chance of cloud free summits?
Rising to 90% east, 70% west BBNP
Sunshine and air clarity?
Patchy sunshine though weakened by high cloud; likely little sun by later afternoon. Very good visibility.
How Cold? (at 750m)
9 to 11C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 10th September 2025
Last updated
Mon 8th Sep 25 at
4:13PM
How windy? (On the summits)
Southerly 25-35mph from dawn. Shifting southwesterly afternoon into evening, may ease somewhat.
Effect of the wind on you?
Walking impeded, strenuous in exposure - stability likely affected. Considerable wind chill.
How Wet?
Showery rain, more frequent afternoon
Showery rain on-and-off most of the day. Showers tending to merge into broader areas of rain with heavy bursts during afternoon.
Cloud on the hills?
Fairly extensive, some variability
Extensive over high terrain most of the day with banks and patches to lower slopes in and after rain - lowest cloud patches on southern slopes. Bases will vary in and out of rain, some odd higher breaks possible east.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Sunshine unlikely. Often poor visibility in rain.
How Cold? (at 750m)
10C. Chance rising a degree eastern areas. Feeling near freezing in strongest wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Thursday 11th September 2025
Last updated
Mon 8th Sep 25 at
4:13PM
How windy? (On the summits)
Southwesterly 30-35mph, strongest winds perhaps up to 40mph over high tops.
Effect of the wind on you?
Walking largely strenuous; strongest winds on tops may require bracing to maintain balance. Feeling chilly.
How Wet?
Showers, at times frequent and heavy
Showers come and go much of the day, at times quite frequent and heavy with risk of hail/thunder. Rain at times persistent on south and west slopes.
Cloud on the hills?
Variable, some higher breaks between showers
Tops likely shrouded early with variable banks on high terrain, some lower patches on west and southern aspects. Bases tend to lift and breaks to some tops between showers, though filling in for periods during heavier rain.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Bursts of sunshine, though clouding over for periods. Visibility often poor in rain.
How Cold? (at 750m)
7 or 8C. Feeling like -3C in direction strongest wind.
Freezing Level
Above the summits
Planning Outlook
Low pressure over the north Atlantic dominates the weather pattern for the week ahead, maintaining unsettled conditions. West to southwesterly winds prevail bringing frequent rain and cloud to western areas, regularly becoming more widespread as weather features come and go. Breaks may form with some bursts of sunshine, though likely short lived. Early indications suggest a deeper area of low pressure late weekend and early next week will bring widespread gales, possibly severe on highest terrain. Becoming more mixed after mid-month with longer periods of dry weather, but a persistent southwesterly regime will continue to draw unsettled spells of weather into Britain, notably in the north.