Mountain Weather
Information Service
Brecon Beacons Forecast

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

Light wind, negligible impact
Patchwork of cloud and sun
Clear
Cool to mild

Click an icon for more information or click here for a key to all icons.

Click here to download the latest PDF Last Updated Thu 6th Aug 26 at 4:17PM Last Updated Thu 6th Aug 26 at 4:17PM
View our low-graphics version Last Updated Thu 6th Aug 26 at 4:17PM Last Updated Thu 6th Aug 26 at 4:17PM

Viewing Forecast For

Brecon Beacons
Friday 7th August 2026
Last updated Thu 6th Aug 26 at 4:17PM

Summary for all mountain areas

Rain in the Scottish Highlands, persistent central/west areas; windy too, gales developing over summits. Some early rain in England, cloud covering high terrain, improving for frequent sun and minimal hill cloud. Light wind and mostly sunny Wales, just some early cloud and dampness high Snowdonia terrain.

Headline for Brecon Beacons

Calm wind, little hill cloud, patchwork of sunshine

How windy? (On the summits)

A variable west-southwesterly 10mph and often less.

Effect of the wind on you?

Negligible.

How Wet?

Likely dry

A fine drizzle may affect high tops in the early hours, soon fading for dry hills.

Cloud on the hills?

Substantially clear

Patchy cloud at varied elevations in the morning begins lifting to high terrain after dawn. Most summits will clear, but a few odd banks may continue to graze the highest summits to the west for a time.

Chance of cloud free summits?

Rising to 90%

Sunshine and air clarity?

Often sunny but varied patchy cloud around. Very good visibility.

How Cold? (at 750m)

9C rising to 11 to 13C, warmest eastern hills, and only a slight drop into night.

Freezing Level

Above the summits.

Viewing Forecast For

Brecon Beacons
Saturday 8th August 2026
Last updated Thu 6th Aug 26 at 4:17PM

How windy? (On the summits)

South-southwesterly 10-20mph.

Effect of the wind on you?

Fairly small.

How Wet?

Little rain expected

A few light patches of rain drift onto the hills from the southwest, but most slopes will be dry all of daylight.

Cloud on the hills?

Little or none

A few patchy banks on high terrain early in the day, these soon lifting and dissipating for clear hills.

Chance of cloud free summits?

90%

Sunshine and air clarity?

Mostly sunny but weakened by high cloud. Very good visibility.

How Cold? (at 750m)

11C rising to 16C, temperatures slow to drop into night.

Freezing Level

Above the summits.

Viewing Forecast For

Brecon Beacons
Sunday 9th August 2026
Last updated Thu 6th Aug 26 at 4:17PM

How windy? (On the summits)

Southwesterly 25-30mph, a lessening tendency and shifting westerly, later 15mph.

Effect of the wind on you?

Fairly small, though the morning starts blustery on exposed tops.

How Wet?

Patchy rain, chance extended falls

Patchy rain may the mountains at times, some chance of heavier falls towards the west but may also start largely dry; forecast confidence is low.

Cloud on the hills?

Varied, often clear

The hills will see extended clear windows, but where rain occurs, cloud will lower onto high terrain, some lower bases towards the west.

Chance of cloud free summits?

70%

Sunshine and air clarity?

Bursts of sunshine. Good visibility.

How Cold? (at 750m)

13 to 15C, rising to 16C easternmost hills.

Freezing Level

Above the summits.

Planning Outlook

Westerly winds prevail into the weekend: Saturday will see extensive cloud and heavy rain develop across Scotland with gales; bands of rain passing to the south and east into England and Wales through Sunday with showers in Scotland. A ridge of high pressure early next week brings warmer temperatures and clearer hills, though western areas likely remain fairly cloudy with some drizzle on the high tops. Westerly flow returns through mid-week and a series of low pressure systems will pass west-to-east across the country with periods of strong wind (sometimes gales), rain, and low cloud, western hill groups always most affected. Mild-to-warm temperatures and sometimes quite humid. Changeable conditions persist into next weekend.