Mountain weather

Brecon Beacons Mountain weather forecast table

Confidence

High pressure will dominate the weather with high confidence for mainly dry and settled conditions. Lower confidence for cloud extent and height of cloud cover.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.

hazard Severe chill effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
hazard Poor visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.

Mountain weather forecast

Dry with bright spells and light winds.

06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Partly cloudy (night) Sunny intervals Cloudy Cloudy Cloudy Cloudy
Chance of precipitation
(at 600m)
00% 00% <05% <05% <05% <05%

Wind direction and speed (mph)
Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m NW
9
N
7
NW
8
NW
8
NW
5
NW
3
300m W
3
SW
2
W
5
W
4
W
3
SW
2
Valley W
4
SW
3
W
5
NW
4
NW
3
NW
3
Wind gust (mph)
Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m 17 11 11 10 8 6
300m 11 6 9 8 6 4
Valley 10 6 9 8 6 5

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
Valley
Freezing Level
700m
800m
800m
800m
800m
800m

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
-3°
-2°
-2°
-1°
-1°
300m
Valley

Additional weather information

Meteorologist's view

Feeling cold with temperatures close to freezing on the summits.

Weather

Clear spells before dawn with a touch of frost in places. Then some sunny spells today, mainly this morning as the general trend will be increasing cloud amounts. This afternoon the best of any bright or sunny intervals will be mainly across the south and east of the Brecon Beacons. Feeling cold on the tops. Generally cloudy this evening.

Chance of cloud-free mountain/hill tops at 600m

70% at first then gradually decreasing 20% by dusk, with the best chance of afternoon cloud breaks for southern and eastern areas.

Visibility

Mainly very poor with areas of low cloud and fog above 600m, especially across western areas. Below the low cloud, and where cloud breaks occur, good or very good visibility.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
0.2mm0.2mm1.8mm
Measurement date:

Rainfall data provided by Natural Resources Wales. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Sunrise:
Sunset:

Mountain weather information

Weather

A frost in places overnight under any clear spells that develop. Through the day large cloud breaks may develop, most likely across western areas, leading to sunny spells, although some patchy cloud is likely to persist.

Chance of cloud-free mountain/hill tops at 600m

60%.

Maximum wind speed expected

South or southwest 5-10mph.

Temperature

  • At 600m Zero Celsius rising to Plus 1 Celsius.
  • Valley Zero to Plus 2 Celsius rising to 7 Celsius.
  • Freezing level 800m.

Visibility

Occasionally very poor on the tops with patchy cloud above 600m. Generally very good away from low cloud.

Mountain weather information

Monday 24 January

Sunrise:
Sunset:

Patchy frost at first then another dry and mostly cloudy day with light winds. A few bright or sunny intervals possible. Freezing level just above the summits.

Tuesday 25 January

Sunrise:
Sunset:

Patchy frost and fog at first then another dry day with bright spells. Light winds. Freezing level just above the summits.

Wednesday 26 January

Sunrise:
Sunset:

A largely cloudy day with the odd spot of rain. Freshening southwesterly winds.

Updated at:

Summit specific forecast

Mountain summit forecast map

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The summits of each peak form a long ridge with four of the peaks forming a horseshoe shape around the head of the Taf Fechan River which flows away to the south-east. The Brecon Beacons is said to be named after the ancient practice of lighting signal fires (beacons) on mountains to warn of attacks by invaders, or more recently to commemorate public and national events such as coronations or the Millennium.

For ardent mountain climbers, the Brecon Beacons National Park is among the best that Britain has to offer. While it doesn't have some of the headline-grabbing peaks of Snowdonia or the Scottish Highlands, it fits scores of slightly smaller mountains into its relatively compact 519 square mile area. These include the area's highest peak, Pen y Fan, as well as the marginally smaller Corn Du (873 metres). Both offer rather hospitable, anvil-shaped summits to those who reach the top, with plenty of space for rest and photographs, before tackling the descent.