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.
Saturday'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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Hazy, some fog banks
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Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate 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.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Hazy, some fog banks
Distant views reduced by haze, locally foggy for a time in valleys and some hill slopes.
Chilly
Air temperature typically 0 to 5C on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Brecon Beacons
Saturday 16th May 2026
Last updated
Fri 15th May 26 at
4:28PM
Summary for all mountain areas
Chilly but fine with light winds much of the day for the Highlands. Increasing wind, rain and lowering cloud encroaches onto western coasts later in daytime. Southwesterly breezes elsewhere, largely dry until late for northern England, but rain, drizzle and low cloud moves into Wales sooner, more blustery later.
Headline for Brecon Beacons
Patchy rain becomes persistent, cloud lowers, increasing wind.
How windy? (On the summits)
Westerly 20mph at dawn, easing to 15mph for a time in morning. Turning southwesterly, rising gradually toward 25mph, later afternoon into evening reaching gusty 30mph; turning west-northwesterly by dusk.
Effect of the wind on you?
Fairly small in morning, but feeling cool as breeze freshens, more noticeable later, gusts start to affect balance where exposed.
How Wet?
Rain develops, becoming persistent, some heavier rain later
Largely dry early in day, odd brief light showers passing eastwards. Patchy rain and drizzle moving in from west increasingly through middle of day, becoming more persistent afternoon, extending further eastward. Some heavier rain for a time later in day. Then showery rain into late evening and night.
Cloud on the hills?
Mostly little, then lowering in rain, most extensive in west
Patchy cloud on western tops in morning, otherwise largely clear for a few hours toward eastern hills. As rain develops, cloud tending to fill in with time over all higher slopes, to mid-slopes or lower over hills toward southwest of Brecon.
Chance of cloud free summits?
80% dropping to 20% afternoon
Sunshine and air clarity?
Any early weak sun gives way to overcast skies. Visibility starts very good, reducing as rain develops, poorer over hills afternoon.
How Cold? (at 750m)
2C rising to 5C afternoon. Feeling near to -5C where exposed to stronger wind.
Freezing Level
Close to freezing on highest summits and inland valleys at dawn. Rising further above freezing to tops.
Viewing Forecast For
Brecon Beacons
Sunday 17th May 2026
Last updated
Fri 15th May 26 at
4:28PM
How windy? (On the summits)
West turning southwesterly increasing from 20mph to 30mph during the day, risk stronger gusts later.
Effect of the wind on you?
Becoming more blustery, may start to affect ease of walking on exposed terrain with noticeable chill.
How Wet?
Showers develop
A little rain toward west coast early morning, odd showers then develop inland during morning. Heavier showers form middle of day onward, passing eastward in local bands, risk hail & thunder. Tending to clear into evening.
Cloud on the hills?
Patches in morning and in showers
Patchy cloud around west and southern hills in the morning. Mostly lifting to tops or above, briefly lowering with ragged patches around showers.
Chance of cloud free summits?
50% rising to 80%
Sunshine and air clarity?
Largely cloudy with occasional sun, then becoming sunnier near to coast later afternoon onward. Visibility very good, but reduced in showers.
How Cold? (at 750m)
4C rising to 6C. Feeling sub-zero as wind increases.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Monday 18th May 2026
Last updated
Fri 15th May 26 at
4:28PM
How windy? (On the summits)
South-southwesterly 15-20mph, but likely stronger up to dawn. Increasing afternoon to 30mph, later risk 40mph+.
Effect of the wind on you?
Fairly small part of day, but breezy on tops, becoming increasingly blustery, affecting comfortable walking, worsening later.
How Wet?
Local showers, rain likely later in day
Patchy rain and odd showery bursts possible in morning, likely to fade or clear away eastwards middle of day. Odd spots as high cloud thickens, then from late afternoon steadier rain develops quickly from southwest.
Cloud on the hills?
Lifting and clearing; lowering later
Varied cloud banks around hills in morning, particularly south and west areas. Lifting higher, clearing tops and increasingly breaking up into middle of day. However, later in rain, lowering back over hills.
Chance of cloud free summits?
40% rising to 80%; lowering later.
Sunshine and air clarity?
Variable cloud, glimpses of sun, high cloud tends to build to cover the sky afternoon, increasingly overcast. Visibility very good, reducing rain.
How Cold? (at 750m)
3C rising to 6C. If exposed to increasing wind later, feeling nearer -5C, or colder toward dusk.
Freezing Level
Above the summits.
Planning Outlook
A mixed but milder outlook. Showery bursts of rain Sunday and Monday, passing eastwards during the daytimes, generally improving afternoons in western areas. By later Monday, strengthening southerly winds and rain moving into Wales from the southwest. Damp south-southwesterlies then prevail for a few days next week, with rain at times Tuesday and Wednesday, most on western hills, particularly Scotland. A drier and much warmer theme later in the week as higher pressure builds.