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.
Monday's Forecast
Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very 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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
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Severe gale or storm, mobility very difficult
Severe conditions on the mountains, any movement very challenging, you may be blown over. 55-70mph+
Heavy rain
Near-constant heavy rain, sometimes torrential over the mountains, very 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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
Viewing Forecast For
Brecon Beacons
Monday 1st December 2025
Last updated
Sun 30th Nov 25 at
4:24PM
Summary for all mountain areas
Morning rain and snow in Scottish Highlands breaks for several hours then returns from the south later. Rain more persistent over the Southern Uplands with heavy bursts south and a risk of strong winds. Gales and rain widely across England and Wales, increasing risk of flooding in Lakeland and west Wales.
Headline for Brecon Beacons
Gales, risk severe; near-constant heavy rain, rising flood risk
How windy? (On the summits)
South to southwesterly 50 to 60mph, powerful gusts in places downslope to north/east; risk up to 70mph+ for a time afternoon.
Effect of the wind on you?
Difficult conditions all day, challenging balance; strongest gusts may knock you over and carry you a distance. Significant wind chill.
How Wet?
Prolonged heavy rain
Rain rarely ceasing all day; incessant with prolonged heavy falls on south slopes, sometimes more widely. Breaking up into showers overnight. Very wet underfoot with flooding developing.
Cloud on the hills?
Extensive
Blanket cloud across the hills, from low-to-mid slopes upward in areas toward south and west of Brecon. Some higher bases to 600m eastern mid-Wales.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast and dull. Poor visibility.
How Cold? (at 750m)
7 or 8C, later in day starting to drop, then suddenly after nightfall towards 4C. Wind chill feeling nearer -7C in exposure on higher areas.
Freezing Level
Rising from overnight, staying above freezing to the tops all daytime.
Viewing Forecast For
Brecon Beacons
Tuesday 2nd December 2025
Last updated
Sun 30th Nov 25 at
4:24PM
How windy? (On the summits)
Southwesterly 25mph, at times squally gusts 30mph.
Effect of the wind on you?
Breezy over the hills, blustery on higher exposed tops, starting to affect comfortable walking. Noticeable wind chill.
How Wet?
Frequent hail showers west; flooding
Showery bursts coming inland from western coasts, with hail, chance isolated thunder in west. More often dry east Wales. Wet underfoot, streams in spate, possible flooding after previous rain.
Cloud on the hills?
Most persistent toward south/west
Banks of low cloud particularly over southern slopes in the morning, tending to lift above 600m, but may often cap higher tops west of Brecon, varied around rain. Breaks to tops more often in east.
Chance of cloud free summits?
30% south/west, to 60% east/mid Wales
Sunshine and air clarity?
Glimpses of sun mostly toward east and mid Wales, where visibility often very good. Reduced to poor at times in showers.
How Cold? (at 750m)
3C. Wind chill feeling like -5C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 3rd December 2025
Last updated
Sun 30th Nov 25 at
4:24PM
How windy? (On the summits)
Southwesterly 25-30mph.
Effect of the wind on you?
Comfort of walking affected, particularly in exposure where it will feel chilly.
How Wet?
Showers onto south and west slopes
Showers onto southern slopes and high tops all day, most frequent and heavy west of Pen-Y-Fan; May merge into broader areas of rain at times. Black Mountains substantially dry. Later, showers tending to ease.
Cloud on the hills?
Covering high tops and southern slopes
High tops and southern slopes shrouded most of the day with banks as low as 500m during showers. An increasing chance of higher breaks later in the day, particularly north of high tops.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of sun north of high tops, chance increasing as the day goes, particularly low slopes. Very good visibility out of cloud.
How Cold? (at 750m)
3C. Feeling like -5 to -8C in the wind.
Freezing Level
Above the summits
Planning Outlook
A risk of local flooding remains on Tuesday in Wales and the Lake district following Monday's heavy rain. Areas of low pressure circulating to the west and north will dominate the weather pattern in the week ahead, bringing generally unsettled weather. Temperatures near average - higher mountains near or just below freezing point likely for the remainder of the week. Often showery and cloudy in the west with broader bands of rain regularly passing east. Wind speed likely to vary though often quite strong with risk of gales coming and going. First indications suggest unsettled weather will remain dominant into the weekend.