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.
Saturday's Forecast
Windy, walking impeded
Blustery conditions enough to give buffeting on higher terrain or affect balance on exposed ridges. 25 to 40mph.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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.
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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.
Patchwork of cloud and sun
Dry most or all day. A mix of cloud and sunshine. Occasional cloud banks drifting over higher slopes, lifting above the tops.
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.
Viewing Forecast For
Brecon Beacons
Saturday 13th December 2025
Last updated
Fri 12th Dec 25 at
4:13PM
Summary for all mountain areas
Increasingly severe conditions Scottish Highlands: gusty storm-force winds on high terrain and becoming wet from the west. Gales in England and Wales, severe from Snowdonia towards Lakeland/north Pennines; drizzly rain on western slopes, patches drifting east. Driest south Pennines.
Headline for Brecon Beacons
Increasingly windy, gales later; many north slopes clear
How windy? (On the summits)
Southwesterly, 20-25mph from dawn, strengthening through the day to 40-45mph by evening risk of stronger gusts at times.
Effect of the wind on you?
Increasingly strenuous walking conditions on higher terrain, more arduous later in day and gusty with significant wind chill; maintaining balance will become challenging.
How Wet?
Little or no rain
Patchy spots of rain or drizzle, most common high western areas, whilst substantially dry east of Pen-Y-Fan. A risk of more frequent rain later overnight.
Cloud on the hills?
Mostly high tops and southern slopes
Cloud banks drifting over higher tops, most frequent on hills toward south and west bases sometimes down to 600-800m. Higher base further east and into mid-Wales, above tops for periods.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Early sunshine north, high cloud gradually building through the day. Hazy west, visibility reduced in rain, but more often good toward mid-Wales.
How Cold? (at 750m)
4C, fairly steady though may rise slightly late in the day and overnight. Wind chill feeling near to -8C later.
Freezing Level
Above the summits.
Viewing Forecast For
Brecon Beacons
Sunday 14th December 2025
Last updated
Fri 12th Dec 25 at
4:13PM
How windy? (On the summits)
A gusty southwesterly, sustained winds between 45-55mph, may strengthen further. Gusts to middle slopes.
Effect of the wind on you?
Strong gusty winds will challenge balance and stability all day, including less exposed slopes. Significant wind chill.
How Wet?
Some fine drizzle and patchy rain
Some fine drizzle in fog on high terrain, many areas dry. At times falling as patchy rain in the west, an increasing risk through the day.
Cloud on the hills?
Covering high tops, lowest bases south/west
The high west tops likely in fog most or all day. During rain, bases will lower, most significantly on southern aspects, locally down to 500m. Better chance of breaks north and east.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Little or no sunshine; dull on the high tops with haze near the south coast. Better visibility low slopes/north.
How Cold? (at 750m)
5 or 6C, variable. Little change with added height. Feeling like -5 to -8C in direct wind.
Freezing Level
Above the summits
Viewing Forecast For
Brecon Beacons
Monday 15th December 2025
Last updated
Fri 12th Dec 25 at
4:13PM
How windy? (On the summits)
Southwesterly 30-40mph from dawn, perhaps easing to 20mph or less though this uncertain.
Effect of the wind on you?
Strenuous walking in the morning and perhaps all day; feeling chilly. May ease to small effects.
How Wet?
Rain most of the day
Often raining widely, most persistent western slopes where heavy falls may be quite frequent. A chance of some breaks east through these fleeting.
Cloud on the hills?
Fairly extensive
Shrouding the high tops with variable banks regularly drifting down to 700m, lower west where risk reaching lower slopes during heavier moments of rain.
Chance of cloud free summits?
20%
Sunshine and air clarity?
Little or no cloud, often dull west. Visibility variable, often poor.
How Cold? (at 750m)
5C. Feeling like -5C in strongest early wind.
Freezing Level
Above the summits
Planning Outlook
A brief spell of drier-brighter weather on Tuesday, but otherwise staying unsettled into next week as southwesterly winds prevail and low pressure systems pass to the northwest of Scotland; sustained gales over the mountains, severe or stormy for periods. Bands of rain will regularly pass eastward across most areas, showery in the west between wetter spells with hail at times. Expect very wet ground conditions and further flooding of streams and some rivers. Mild for the time of year, temperatures only just below freezing intermittently on higher Scottish tops, even here will experience spells above freezing with thawing, any lying snow patchy, but beware some icy surfaces on the very highest tops where some refreezing occurs. Detail becomes very uncertain after next weekend though temperatures likely to drop.