Mountain weather

Bannau Brycheiniog / Brecon Beacons

Yellow warning

Yellow weather warning in force for Bannau Brycheiniog / Brecon Beacons

Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table

Confidence

Moderate for low cloud on Saturday. High for changeable weather into next week.

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

Isolated snow showers dying away.

Time 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Partly cloudy (night) Sunny intervals Sunny intervals Cloudy Partly cloudy (night) Cloudy
Chance of precipitation
(at 600m)
20% 20% 10% 10% 00% 00%

Wind direction and speed (mph)
Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m NW
10
NW
9
W
6
W
6
S
6
S
10
300m W
4
W
3
W
3
W
2
S
5
S
6
Valley W
5
W
4
W
3
W
2
S
3
E
2
Wind gust (mph)
Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m 15 11 10 8 8 14
300m 11 9 7 5 6 12
Valley 11 9 7 5 6 7

Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m
-1°
-1°
-1°
300m
Valley
Freezing Level
500m
500m
600m
700m
600m
600m

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

Additional weather information

Meteorologist's view

Remaining very cold with lying snow and icy surfaces.

Weather

Small chance of isolated snow showers at first. Then dry with variable amounts of cloud. Remaining very cold with icy surfaces.

Chance of cloud-free hill tops

60% increasing 90%

Low cloud and visibility

Areas of cloud down to 500 to 700 metres this morning with poor or very poor visibility, this tending to become more broken this afternoon but some of the higher tops may still be shrouded in cloud.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
5.8mm13.2mm14.2mm
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

Rain, briefly preceded by snow, will quickly extend east later in the night. Then the rest of the day will be overcast with spells of rain, heavy at times. Lying snow will thaw through the day with a chance of flooded watercourses.

Chance of cloud-free hill tops

90% at first rapidly decreasing to 0%.

Maximum wind speed expected

Southerly average speeds 30 mph with gusts to 45 mph on the summits.

Temperature

  • At 600m Zero Celsius rising to 8 Celsius
  • Valley 0 rising to 10 Celsius
  • Freezing level 500 metres at first, quickly rising above summits

Low cloud and visibility

Quickly decreasing poor or very poor with extensive cloud down to 400 to 600 metres arriving and then persisting.

Mountain weather information

Mon 12 Jan

Sunrise:
Sunset:

Cloudy with showers or occasionally longer spells of rain. Freezing level above summits. `

Tue 13 Jan

Sunrise:
Sunset:

Some showery rain or snow at first, otherwise a drier day with bright spells. Freezing level above summits.

Wed 14 Jan

Sunrise:
Sunset:

Dry with variable amounts of cloud. Freezing level above summits.

Updated at:

Summit specific forecast

Mountain summit forecast map

Loading map…