Mountain weather
Yellow warning

Yellow weather warning in force for Brecon Beacons

Brecon Beacons Mountain weather forecast table

Confidence

High for continuing cold but largely dry, but lower for details regarding any snow showers on Saturday.

Sunrise:
Sunset:

This evening forecast

Dry with long clear spells. Mainly light northeasterly winds

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.

Mountain weather forecast

Dry with long sunny spells. Mainly light winds

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Clear night Clear night Clear night Sunny day Sunny day Sunny intervals Partly cloudy (night) Partly cloudy (night)
Chance of precipitation
(at 600m)
00% 00% 00% 00% 00% <05% <05% 10%

Wind direction and speed (mph)
Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m NE
9
NE
9
N
9
N
7
NW
5
W
6
W
7
W
7
300m NE
3
NE
2
N
2
W
1
W
3
W
4
W
5
W
4
Valley N
2
N
1
NW
2
NW
3
W
3
W
4
W
4
W
4
Wind gust (mph)
Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m 13 13 12 10 7 10 11 10
300m 7 7 6 4 6 9 9 8
Valley 6 6 5 4 6 9 9 9

Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-4°
-4°
-4°
-3°
-1°
-1°
-3°
-3°
300m
-4°
-4°
-3°
-3°
-2°
-2°
Valley
-4°
-3°
-2°
-2°
-2°
-2°
Freezing Level
0m
0m
0m
0m
200m
300m
200m
200m

Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-9°
-9°
-9°
-7°
-4°
-4°
-7°
-7°
300m
-6°
-6°
-5°
-5°
-1°
-4°
-4°
Valley
-7°
-6°
-4°
-4°
-1°
-4°
-5°

Additional weather information

Meteorologist's view

Frozen surfaces persisting at all but the lowest levels through the day.

Weather

Dry and clear overnight, perhaps some low level mist and freezing fog patches. Then a dry day with long spells of sunshine, especially through the morning with a little more cloud in the afternoon. Risk of one or two light snow showers in the evening.

Chance of cloud-free hill tops

Close to 100% through much of the day, chances fall a little through the evening.

Low cloud and visibility

Little or no cloud below the summits until evening with visibility very good or excellent, perhaps a kilometre or less in any low level mist and fog patches and any evening snow showers.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
0.2mm0.2mm2mm
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 few snow showers possible but most places dry with some good spells of sunshine.

Chance of cloud-free hill tops

Around 60%

Maximum wind speed expected

Westerly winds around 10mph or less

Temperature

  • At 600m Around minus 3 Celsius
  • Valley Minus 4 or 5 Celsius overnight, rising to plus 3 or 4 Celsius by day
  • Freezing level Around 300m

Low cloud and visibility

Occasional or periods of cloud above about 600m. Otherwise visibility very good falling to around a kilometre at times in snow showers.

Mountain weather information

Sun 11 Dec

Sunrise:
Sunset:

Mainly dry with long sunny spells. Mainly light northeasterly winds. Frozen surfaces persisting at all but the lowest levels through the day.

Mon 12 Dec

Sunrise:
Sunset:

Another mainly dry day with sunny spells. Feeling bitterly cold, especially at height, in the strengthening easterly winds. Freezing level rising to 300m.

Tue 13 Dec

Sunrise:
Sunset:

Continuing mainly dry with some sunny spells. Bitterly cold, strong easterly winds, risk of summit gales. Freezing level around 300m.

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.