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.
Hot
Heatwave conditions. Very high temperatures, rising to 20C+ on high tops, approaching 30C in some valleys. Beware of heat stroke and dehydration. Carry plenty of liquid.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
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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.
Hot
Heatwave conditions. Very high temperatures, rising to 20C+ on high tops, approaching 30C in some valleys. Beware of heat stroke and dehydration. Carry plenty of liquid.
Strong warm sunshine
High UV levels, feeling very warm when ascending, beware of dehydration and sunburn.
Viewing Forecast For
Brecon Beacons
Friday 26th June 2026
Last updated
Thu 25th Jun 26 at
4:29PM
Summary for all mountain areas
Starting hot and humid again, a cooling trend afternoon. Thundery showers for many in the morning, tending to clear in Wales. Afternoon thunderstorms and torrential rain in north England and Scotland, risk of localised flash flooding near heaviest downpours. Driest south Wales and Northwest Highlands.
Headline for Brecon Beacons
Risk early thundery showers; brighter cooler afternoon
How windy? (On the summits)
South-southwesterly 15-25mph; likely gusty over high terrain, with some chaotic stronger gusts around the morning hours.
Effect of the wind on you?
Fairly small, but notably breezy in the morning with buffeting gusts starting to affect stability.
How Wet?
Risk early thundery showers, dry afternoon
From before dawn, risk scattered bursts of heavy, thundery rain. These likely drift north for dry conditions by midday; some showers may linger towards mid-Wales for longer.
Cloud on the hills?
A deck of cloud over high western terrain much of the day
Other than some early ragged patchy cloud, the hills will be largely clear at dawn. Banks of cloud begin forming on upper slopes through morning, the lowest banks to 500m southern slopes for several hours. North slopes east of Brecon may stay mostly clear, and a breaking tendency later too.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Some sun through high cloud, probably more overcast for a period. Visibility improves after morning haze lifts.
How Cold? (at 750m)
Starting at a hot and humid 22 to 24C from overnight, cooling through the day, finishing 17 to 19C, coolest west (perhaps 16C Preseli hills). Black Mountain slower to cool.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Saturday 27th June 2026
Last updated
Thu 25th Jun 26 at
4:29PM
How windy? (On the summits)
Southerly, some uncertainty of peak speed, in range 25mph to possibly 40mph, at least in gusts on exposed high terrain.
Effect of the wind on you?
Blustery over high terrain, some buffeting gusts making walking uncomfortable in places.
How Wet?
Bursts of rain, risk thunder
Uncertain detail: expect clusters of heavy showery rain tracking northeastward throughout the day. Lengthy drier windows possible, but risk sudden downpours, thunder and lightning.
Cloud on the hills?
Varied, lowest early and in showers
Patchy cloud banks, risk more extensive southwestern slopes early in day. Rising and breaking into middle of day, best east and mid Wales. In rain, lowering, filling in again, low ragged patches.
Chance of cloud free summits?
50%
Sunshine and air clarity?
Occasional sun, but high cloud covering sky for periods. Some mistiness in morning. Visibility often good, but occasionally poor in rain.
How Cold? (at 750m)
14 to 16C, typically warmest east where may reach up to 18C. Still rather humid. Feeling cooler directly in wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Sunday 28th June 2026
Last updated
Thu 25th Jun 26 at
4:29PM
How windy? (On the summits)
Southwesterly 20-25mph, occasionally gusting up to 30mph over tops.
Effect of the wind on you?
Fairly small, gusts sometimes impacting ease of walking.
How Wet?
Morning rain, substantially dry afternoon
From before dawn, several bands of rain pass west-to-east, brief heavier falls likely in the morning. From midday onward, largely dry, some risk of light spots of rain drifting onto western hills.
Cloud on the hills?
Often clearing summits afternoon
Fairly extensive through much of morning, to most middle slopes, or lower western slopes with ragged patches to forest canopies in the early morning. From noon, a rising and breaking trend, to likely just passing banks over high tops.
Chance of cloud free summits?
20%, rising afternoon to 70%
Sunshine and air clarity?
Mostly cloudy morning breaking into a patchwork of cloud and sun afternoon. Visibility becoming very good.
How Cold? (at 750m)
11 to 13C, warmest east. Slightly cooling later afternoon.
Freezing Level
Above the summits.
Planning Outlook
The transition away from the exceptionally hot and humid weather begins on Saturday as wind shifts southwesterly and strengthens. Rain and thunderstorms may continue on Saturday as well as perhaps early Sunday, but a front will push east across the country on Sunday, followed by fresher, sunnier weather; patchy rain will likely linger here and there, notably northwest Scotland. Westerly Atlantic patterns dominate next week: high pressure south and low pressure north will bring alternating settled and unsettled windows. Wind generally on the strong side, mild to sometimes warm temperatures, and periods of rain punctuated by bright sunshine. North and western areas most vulnerable to extensive cloud and prolonged rain.