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.
Today's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
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.
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 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.
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
Monday 15th December 2025
Last updated
Sun 14th Dec 25 at
4:00PM
Summary for all mountain areas
A slow-moving area of rain affects England and Wales, heavy falls over south-facing hills, flooding likely. Drier for much of Scotland, though some showers affect the west coast; beware flooding after previous rain. Back just below freezing over higher Munros, some icy surfaces on tops.
Headline for Brecon Beacons
Rain often heavy and low cloud all day, strong gusty wind.
How windy? (On the summits)
Southwesterly 30-40mph much of the day, powerful gusts in places, tending to ease a little.
Effect of the wind on you?
Strenuous walking, very gusty, affecting balance on exposed terrain; feeling chilly.
How Wet?
Rain most of the day, heavy southwest
Often raining widely, constant heavy falls particularly areas south and west of Brecon. Fading only gradually into evening and night. Very wet underfoot, streams rising to be in spate or flood.
Cloud on the hills?
Extensive low cloud
Shrouding the hills widely with variable banks to mid or some lower slopes most persistent south and west of Brecon.
Chance of cloud free summits?
10%
Sunshine and air clarity?
Overcast and dull. Visibility mostly poor due to rain.
How Cold? (at 750m)
5C. Feeling like -5C in strongest early wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Tuesday 16th December 2025
Last updated
Sun 14th Dec 25 at
4:00PM
How windy? (On the summits)
Northwesterly 10 to 20mph.
Effect of the wind on you?
Fairly small.
How Wet?
Largely dry
Remnants of overnight rain may linger up to dawn, but a dry daytime overall. Chance of an odd light shower near coast. Very wet underfoot following previous heavy rain, streams in spate, flooding.
Cloud on the hills?
Patches higher and western tops
Patchy cloud banks most common west Wales, may come and go above 600m toward Cardigan Bay. Some varied banks possible elsewhere from dawn, but largely clearing inland and eastwards.
Chance of cloud free summits?
60%
Sunshine and air clarity?
Early cloudy skies, high cloud tending to thin to reveal some sun, soonest in west. Visibility increasingly excellent.
How Cold? (at 750m)
3C. Feeling like -3C directly in the breeze.
Freezing Level
Above highest summits. Slight frost sheltered valleys in morning.
Viewing Forecast For
Brecon Beacons
Wednesday 17th December 2025
Last updated
Sun 14th Dec 25 at
4:00PM
How windy? (On the summits)
South-southwesterly 40 to 50mph, risk 60mph high tops, local powerful gusts north of higher summits.
Effect of the wind on you?
Challenging conditions over the hills, walking difficult in places higher up, sudden buffeting to some mid-slopes.
How Wet?
Rain soon develops
Rain moving in from west soon from dawn, setting in persistently over western hills, increasingly Brecon Beacons, some heavy falls; patchier further east into mid-Wales.
Cloud on the hills?
Increasingly extensive
Lowering in morning to blanket most hills, from mid-to-lower slopes in west and south of Brecon. Higher bases toward Black Mountains, but rarely above the tops.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Overcast, increasingly murky.
How Cold? (at 750m)
3C rising during day to 6C. Feeling like -7 to -10C directly in the wind.
Freezing Level
Above the summits.
Planning Outlook
Prolonged rain will leave flooding of streams and rivers in many mountain areas early in the new week, with the exception of northeastern Scotland. As a front clears Monday into Tuesday it will drop to freezing above 900m, beware of ice forming on higher Scottish mountains. Drier conditions for many on Tuesday, though showery near west coast of Scotland. By Wednesday, another system sweeps in from the Atlantic bringing further rain and gales. A risk of more heavy rain particularly England and Wales later in the week. A change of weather pattern is likely in the run up to Christmas, as high pressure builds northward, bringing drier weather, possibly chillier with time.