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
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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.
Click an icon for more information or click here for a key to all icons.
Gale force, walking arduous
Considerable buffeting, walking into the wind will be strenuous on exposed terrain, stronger gusts may knock you off your feet. 40 to 55mph.
Frequent or persistent rain
Steady rain fairly persistent, occasionally heavy, rather wet underfoot.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
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
Friday 18th September 2026
Last updated
Thu 17th Sep 26 at
4:22PM
Summary for all mountain areas
Already windy with light showery rain over western hills early in the day, but conditions will worsen from the west as gales strengthen and rain / drizzle becomes persistent, some heavier rain; cloud bases lower to widely blanket hills, lowest in west.
Headline for Brecon Beacons
Windy, strengthening gales; persistent rain and drizzle develops.
How windy? (On the summits)
Westerly 25mph early morning, shifting southwesterly and strengthening rapidly middle of day into afternoon to 45mph, in places gusty 55-60mph higher tops.
Effect of the wind on you?
Increasingly strenuous walking, deteriorating during day to make walking arduous with notable wind chill; powerful gusts giving buffeting toward some lower slopes.
How Wet?
Rain develops, sets in heavier west
The morning is largely dry, locally an odd drizzly spot in the west. Toward midday, rain and drizzle arrives from the west, becoming fairly persistent, heaviest western hills, then rain on-and-off into evening-night, some further heavy falls.
Cloud on the hills?
Covering high tops, becoming extensive, lowering
High terrain begins in cloud, lower patches here and there, lifting towards tops but summits more often covered than clear of cloud. As rain arrives afternoon, blanket cloud fills in towards 400-500m, and to lower elevations southwestern areas.
Chance of cloud free summits?
40%, lowering to 10%
Sunshine and air clarity?
Patchy weak sunshine early in day, high cloud thickening to be overcast and dull. Hazy at best, visibility deteriorating to poor afternoon.
How Cold? (at 750m)
8C, rising towards 10C afternoon, reaching 12C by evening, little change after dark; becoming more humid. Feeling like 0C or below in direct wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Saturday 19th September 2026
Last updated
Thu 17th Sep 26 at
4:22PM
How windy? (On the summits)
Southwesterly 30 to 40mph.
Effect of the wind on you?
Strenuous walking conditions on higher exposed areas, buffeting gusts in places. Considerable wind chill.
How Wet?
Rain and drizzle may persist
A band of persistent rain likely to linger across south Wales, a mix of drizzle and some steadier rain, at times heavier in southwest, may fade to patchier rain east & mid Wales, but a chance of rain returning steadier again later.
Cloud on the hills?
Low cloud may persist
Risk of cloud shrouding the hills throughout the day, from low-mid levels upward on some south and west-facing slopes in rain. Bases may lift gradually, local breaks east.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Largely cloudy, some glimpses of sun may emerge in east Wales. Hazy especially toward coasts, generally poor in rain, better east.
How Cold? (at 750m)
10 to 12C, trending slightly cooler later in the daytime. Feeling like 0C directly in the wind.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Sunday 20th September 2026
Last updated
Thu 17th Sep 26 at
4:22PM
How windy? (On the summits)
Westerly 25-30mph early morning, easing to 15-20mph.
Effect of the wind on you?
Blustery and rather cool early in the day, but moderating to be fairly small.
How Wet?
Risk becoming drizzly west
Local drizzly showers possible over west Wales early in day fading. Some drizzle may return across western hills during the afternoon.
Cloud on the hills?
Lifting for a time, then lowering again
Patchy cloud grazing higher slopes above 700-800m in the morning, mostly in west. Tending to thin and break above the tops for a time, but then lowering cloud may well fill in again from the southwest afternoon.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Varied high cloud likely thickens to cover the sky, becoming overcast, risk dull west. Slight haze west and south, very good visibility eastern hills.
How Cold? (at 750m)
7C rising to 9C, then tending to rise further onward into night. Feeling close to 0C in early wind.
Freezing Level
Above the summits.
Planning Outlook
Gale-force southwesterly winds continue extensively on the mountains into Saturday and early Sunday. Frequent rain over western hills, showers passing eastwards, tending to fade during Sunday as higher pressure begins to build from the south, allowing wind speeds to lessen too over England & Wales. Warmer into early next week, though higher humidity brings more cloud some drizzly rain to the west. A generally more promising forecast for late September as high pressure nearby offers drier and warmer weather for more places. Weather systems grazing past Scotland to the north still bring locally stronger winds and occasional rain mainly to the northwest.