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.
Sunday'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.
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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
Sunday 7th December 2025
Last updated
Sat 6th Dec 25 at
4:18PM
Summary for all mountain areas
Patchy rain in western areas early, drier east though lots of cloud over summits; some clear tops central and south Pennines. Winds soon begin to strengthen widely, quickest in Wales and reaching gale force here afternoon. Rain also arrives from the west afternoon, spreading widely into evening.
Headline for Brecon Beacons
Blustery, afternoon gales with rain setting in
How windy? (On the summits)
Southerly 20-25mph from dawn, soon strengthening, reaching 35-45mph around dusk with a west-southwesterly trend (some variability); gusts reaching 50mph+ for a time around and after dusk.
Effect of the wind on you?
Conditions soon deteriorate to strenuous walking over higher terrain, further deteriorating with a risk of difficult conditions and challenging mobility later. Significant wind chill.
How Wet?
Patchy rain, spreading widely afternoon
Occasional patches of rain drifting from the west in the morning. Rain sets in more widely through afternoon into evening with a risk of heavy falls on western slopes. Rain will break as night progresses.
Cloud on the hills?
Extensive
Shrouding the hills widely, with banks of cloud from low to mid elevations upward.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
Generally cloudy and misty, poor visibility likely most hills.
How Cold? (at 750m)
8C, fairly small variation with height and rising a degree higher during the day. A sharp drop from dusk into night, lowering to 6C. Feeling below freezing in the wind, near -5C if speeds increase.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Monday 8th December 2025
Last updated
Sat 6th Dec 25 at
4:18PM
How windy? (On the summits)
Southwesterly 35-50mph from dawn, easing to 30-35mph through morning where speeds likely to remain.
Effect of the wind on you?
Strenuous walking with buffeting in exposure all day, arduous over the summits early. Considerable wind chill.
How Wet?
Intermittent rain with heavy bursts
Intermittent showery rain most of the day, may merge into broader areas of rain for periods with heavy bursts.
Cloud on the hills?
Varied, often covering high terrain
Largely cloudy over high terrain most of the day, some variability of bases between 600-700m, odd higher breaks north of the high tops but also filling in for periods during longer bursts of rain.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Little sunshine expected. Variable visibility, will be poor in rain.
How Cold? (at 750m)
6 or 7C, a slow rise into night. If exposed to stronger winds, risk feeling like -7C on high tops.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Tuesday 9th December 2025
Last updated
Sat 6th Dec 25 at
4:18PM
How windy? (On the summits)
South-southwesterly 55-65mph, gusts reaching 75mph. Easing into nighttime, trending southwesterly.
Effect of the wind on you?
Widely difficult conditions making any mobility tortuous. Significant wind chill.
How Wet?
Rain rarely ceasing
Widespread rain, incessant and heavy near and south of Pen-Y-Fan, perhaps all day; local improvements afternoon but always a risk of returning. Beware fast-rising streams and flood risk.
Cloud on the hills?
Extensive, local improvements later
Blanket cloud from middle or lower slopes up through the morning, always lowest on south-facing. Breaks to middle slopes occurring afternoon, chance of breaks up to 600-700m Black Mountains.
Chance of cloud free summits?
Less than 10%
Sunshine and air clarity?
Overcast and dull. Poor visibility.
How Cold? (at 750m)
9 to 11C, sharply dropping afternoon towards 7C. Feeling as cold as -5C in afternoon wind.
Freezing Level
Above the summits
Planning Outlook
Generally unsettled into the week with areas of low pressure moving in from the Atlantic on prevailing southwesterly winds. Temperatures relatively mild, higher tops in the Highlands intermittently just below freezing point; expect periods of thawing even up to these tops. Day-to-day weather detail will be uncertain even in short-range as complex systems develop - a series of frontal systems bringing spells of rain, at times more widespread and heavy - any snowfall mostly confined to highest tops in Scotland; also showers at times with hail mostly near western coasts. Wind speeds will also vary, often blustery with periods of gales or severe gales on tops, but local lulls too.