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
Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
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Moderate breeze, locally gusty
A noticeable breeze, feeling cool where exposed on tops. Locally may be gusty, but unlikely to affect walking progress. 15-25mph.
Patchy rain or drizzle
Rain on and off, or generally drizzly - total amounts small, but may be persistently damp, especially where hills are shrouded in cloud.
Poor visibility
Murky conditions with areas of fog shrouding the hills, making navigation challenging. Map and compass essential.
Chilly
Air temperature near or just above freezing on higher summits. Feeling distinctly chilly on tops when stationary or where exposed to wind. Take appropriate layers.
Viewing Forecast For
Brecon Beacons
Tuesday 21st January 2025
Last updated
Mon 20th Jan 25 at
4:00PM
Summary for all mountain areas
Below freezing on Scottish tops. Noticeably chilly in the breeze. A cluster of showers with hill snow moves across the Highlands early in the day, but clears to be often dry and bright. Showers continue near to western coasts, some moving inland. A slow-moving front over England & north Wales brings grey and damp conditions.
Headline for Brecon Beacons
Largely dry with varied low cloud/fog. Moderate breeze.
How windy? (On the summits)
South-southwesterly 15-20mph, occasional 25mph around higher tops.
Effect of the wind on you?
Fairly small, but may start affect comfortable walking where exposed on higher slopes. Marked wind chill.
How Wet?
Local drizzle mainly west
Drizzly rain at times on hills nearer to Cardigan Bay. Occasional drizzly pockets elsewhere, but substantially dry across southeastern areas.
Cloud on the hills?
Mix of low cloud and fog, some breaks
Varied banks of cloud over the hills, some patchy fog banks into some valleys in the morning. Cloud often capping western Cambrians and higher tops further inland, but some breaks further south and east.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Glimpses of weak sun through high cloud. Hazy or misty in places lower down, local improvements developing.
How Cold? (at 750m)
2C. Wind chill feeling like -5C.
Freezing Level
Above the summits. Slight frost some valleys in the morning.
Viewing Forecast For
Brecon Beacons
Wednesday 22nd January 2025
Last updated
Mon 20th Jan 25 at
4:00PM
How windy? (On the summits)
Variable direction, 10mph and lower.
Effect of the wind on you?
Little to none
How Wet?
Little precipitation expected
A mostly dry day. Slight possibility of stray drizzly showers toward west coast.
Cloud on the hills?
High terrain intermittently covered
Cloud bases intermittently down to high terrain, sometimes lower. Occasional moments of cloud breaks.
Chance of cloud free summits?
40%
Sunshine and air clarity?
Glimpses of sun possible, though possibly blocked by high cloud. Good visibility out of cloud, but rather hazy east Wales.
How Cold? (at 750m)
1 to 2C
Freezing Level
Just above the summits, some moments of lowering to highest tops
Viewing Forecast For
Brecon Beacons
Thursday 23rd January 2025
Last updated
Mon 20th Jan 25 at
4:00PM
How windy? (On the summits)
Southerly turning west-southwesterly; speeds soon increasing 30 to 45mph, risk 60-70mph for a time, suddenly squally.
Effect of the wind on you?
Soon arduous or difficult conditions, frequent buffeting where exposed; gusts may knock you over. Significant wind chill.
How Wet?
Heavy rain, sleet highest tops
Soon from dawn, abruptly heavy rain, sleet or possible snow on highest tops. Continuing for several hours, then breaking up into clusters of showers into afternoon, but may still result in frequent precipitation. Chance isolated thunder.
Cloud on the hills?
Fairly extensive, varied extent
Some banks of cloud to lower south-facing slopes at first. Then varied across the hills, often covering many tops, but some breaks occasionally forming if rain breaks up.
Chance of cloud free summits?
30%
Sunshine and air clarity?
Generally overcast. Visibility very poor in rain, local improvements.
How Cold? (at 750m)
1 or 2C. Wind chill feeling like -10 to -15C.
Freezing Level
Close to highest summits.
Planning Outlook
Deteriorating later this week - a series of storm systems coming in from the Atlantic through late January bringing frequently severe conditions to the mountains. Thursday sees winds reach gale force on many tops with a spell of heavy rain and upland snow developing from the west. By Friday, severe conditions from lower elevations upward, hurricane-force winds over the mountains, plus extensive rain and hill snow. Gales continue into Saturday, severe for the Highlands. Snow is likely to accumulate over Scottish mountains during the next week or so with only brief thawing. More variable temperatures for England and Wales with cycles of freeze and thaw. Atlantic patterns likely prevail into early February.