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.
Tuesday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
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Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Heavy snow and hail showers, isolated lightning
Showery precipitation, often heavy, may merge to become constant for periods. A mix of snow and hail often falling to lower slopes. Risk of very localised thunder and lightning.
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.
Flooding
Fast-flowing rivers and streams. Some routes may be impassable due to flooding.
Viewing Forecast For
Brecon Beacons
Tuesday 2nd December 2025
Last updated
Mon 1st Dec 25 at
4:10PM
Summary for all mountain areas
Hail showers will frequent west coast hills fairly widely; snow on the highest tops with risk of isolated lightning. Drier inland, particularly northeast Scotland where sunny bursts will occur. Chilly, feeling cold in a brisk southwesterly wind; this easing in Wales and south Pennines afternoon.
Headline for Brecon Beacons
Hail showers, mostly west; breezy with flooded streams
How windy? (On the summits)
Southwesterly 25-30mph, strongest in the morning. Some squally gusts with higher speeds over high tops near showers.
Effect of the wind on you?
Blustery on higher exposed tops, starting to affect comfortable walking, particularly in gusts around showers. Effects fairly small at times. 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 though showers may become more frequent and widespread later. Wet underfoot, streams in spate, 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 with higher breaks, but may often cap higher tops west of Brecon; varied around rain. Best breaks east earlier in the day.
Chance of cloud free summits?
30% south/west; 60% east/mid Wales, though deteriorating later
Sunshine and air clarity?
Glimpses of sun mostly toward east and north, where visibility often very good. Reduced to poor where in showers.
How Cold? (at 750m)
3C. Wind chill feeling like -7C.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Wednesday 3rd December 2025
Last updated
Mon 1st Dec 25 at
4:10PM
How windy? (On the summits)
Southwesterly 25-30mph.
Effect of the wind on you?
Comfort of walking affected, blustery in exposure where it will feel chilly.
How Wet?
Showers, mostly south and west slopes
Showers onto southern slopes and high tops all day, most west of Pen-Y-Fan; May merge into broader areas of rain at times. Driest Black Mountains.
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 for a few hours later, though alternately filling in again as well.
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
Viewing Forecast For
Brecon Beacons
Thursday 4th December 2025
Last updated
Mon 1st Dec 25 at
4:10PM
How windy? (On the summits)
Pre-dawn, southerly 40-45mph. Soon westerly 25-30mph, gradually easing as the day goes.
Effect of the wind on you?
Arduous conditions around dawn with wind chill will soon start to ease, trending towards fairly small effects.
How Wet?
Some showers south and west
Early patchy rain in the east soon passes. Some showers drifting onto southern and western slopes, though many areas may be substantially dry.
Cloud on the hills?
Improving to banks over high tops
Variable banks of cloud on high terrain, a few lower banks too, tending to clear through morning to just banks over high terrain as showers come and go. An increasing chance of clear summits.
Chance of cloud free summits?
Sunshine and air clarity?
Glimpses of weak sun appearing afternoon. Good visibility though some haze.
How Cold? (at 750m)
2 or 3C. Feeling like -10C early in the day in the wind.
Freezing Level
Above the summits
Planning Outlook
Low pressure circulating to the west and north will dominate the weather for the next 7 to 10 days, bringing generally unsettled weather. A brief period of slack pressure on Thursday into Friday will ease winds for a time though patchy rain will linger in several areas. Strong southwesterly winds return over the weekend bringing cloud and rain to many mountains, most persistent on southwestern slopes. Several low pressure systems with continue crossing the British Isles through 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. Brighter, drier periods will punctuate the unsettled weather next week but these likely short-lived.