Mountain weather

Bannau Brycheiniog / Brecon Beacons

Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table

Confidence

High confidence, becoming low from Sunday on development of low in the south.

Sunrise:
Sunset:

This evening forecast

Clear spells and scattered showers through this evening, falling as snow above 600m. Moderate to strong west to southwesterly 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.

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

Sunshine and scattered showers on Friday, wintry at height.

00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Heavy snow shower (night) Partly cloudy (night) Partly cloudy (night) Light snow shower (day) Heavy snow shower (day) Heavy snow shower (day) Light snow shower (night) Partly cloudy (night)
Chance of precipitation
(at 600m)
70% 30% 30% 40% 70% 60% 40% 30%

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 SW
19
W
20
W
19
W
15
SW
14
W
12
W
10
SW
10
300m SW
12
W
12
W
11
W
10
SW
10
W
9
SW
6
SW
6
Valley SW
10
W
10
W
9
W
9
W
8
W
8
W
5
SW
5
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 26 28 28 21 20 18 14 15
300m 25 25 23 19 19 17 13 13
Valley 23 24 22 19 18 16 12 12

Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-1°
300m
Valley
Freezing Level
600m
500m
500m
600m
600m
500m
500m
500m

Altitude above mean sea level
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
600m
-6°
-7°
-6°
-5°
-4°
-4°
-5°
-6°
300m
-3°
-2°
-2°
-1°
-1°
-2°
Valley
-2°
-2°
-1°
-1°

Additional weather information

Meteorologist's view

Feeling very cold, especially at height, be prepared with appropriate layers.

Weather

A mix of patchy cloud, clear or sunny spells and scattered showers throughout the day. These showers falling as snow above 500m and heavy at times. Showers easing off during the evening.

Chance of cloud-free hill tops

60%

Low cloud and visibility

Scattered or broken cloud base 500-700m. Visibility poor in hill fog or snow, slightly reduced in rain, otherwise good.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
21mm50.4mm51mm
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

Patchy cloud and sunny spells on Saturday, dry during the morning but scattered showers into the afternoon, falling as snow above 600m. Cloud clearing into the evening.

Chance of cloud-free hill tops

80%

Maximum wind speed expected

Southwesterly 5-10 mph, mainly light

Temperature

  • At 600m Minus 1 rising to plus 4 Celsius
  • Valley Plus 1 rising to plus 7 Celsius
  • Freezing level 400m lifting to 800m

Low cloud and visibility

Few or scattered cloud base 500-700m, clearing during the evening. Visibility generally good, but poor in hill fog or snow.

Mountain weather information

Sun 25 Feb

Sunrise:
Sunset:

Outbreaks of rain during the day, some sleet or snow on hill tops, clearing into the evening. Freezing level 800m. Moderate easterly winds, increasing northeasterly.

Mon 26 Feb

Sunrise:
Sunset:

Mainly dry and sunny on Monday. Freezing level 600-800m. Strong north to northeasterly winds easing.

Tue 27 Feb

Sunrise:
Sunset:

A dry start to the day but rain arriving from the northwest later. Freezing level rising above summits. Light winds, increasing southwesterly.

Updated at:

Summit specific forecast

Mountain summit forecast map

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