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

High for mostly cloudy days through Friday and Saturday and for a change to more unsettled conditions over the weekend, but lower with regard to inversion details and rainfall details from late Saturday.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

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

Mostly cloudy but mainly dry. Freshening southeasterly winds.

Time 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Fog Cloudy Sunny intervals Sunny intervals Cloudy Fog
Chance of precipitation
(at 600m)
10% 10% <05% <05% <05% <05%

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

Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m
10°
11°
10°
300m
13°
14°
11°
10°
Valley
14°
14°
11°
10°
Freezing Level
2,000m
2,000m
1,900m
1,900m
1,900m
1,900m

Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
12°
13°
10°
Valley
13°
14°
10°
10°

Additional weather information

Meteorologist's view

Nothing to add.

Weather

Quite a lot of cloud across the hills today, the best of brighter spells in the west. Mainly dry through the evening.

Chance of cloud-free hill tops

85%

Low cloud and visibility

Cloud bases should remain above summits today. Visibility good or very good, with clear views of distant hills.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
0mm0mm0mm
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

Another cloudy day, but turning brighter later in the day. Risk of more persistent rain reaching the area later in the evening.

Chance of cloud-free hill tops

30% initially, becoming 80% in the afternoon.

Maximum wind speed expected

Southeasterly 15-20mph increasing 25-30mph through the afternoon, gusts around 45mph over ridges and summits in the evening.

Temperature

  • At 600m Plus 7 or 8 Celsius
  • Valley Around plus 8 or 9 Celsius overnight rising to plus 15 Celsius by day
  • Freezing level Above the summits

Low cloud and visibility

Cloudy with bases down to 400-500m initially, this lifting above summits by midday. Cloud lowering to 500-600m in the evening. Away from cloud visibility good or very good, falling to several kilometres at times in evening rain.

Mountain weather information

Sun 19 Oct

Sunrise:
Sunset:

Cloudy with occasionally heavy rain, clearing to showers later. Strong southeasterly winds, veering southwesterly and easing a little later. Freezing levels remaining above summits.

Mon 20 Oct

Sunrise:
Sunset:

Rather cloudy with showers or longer spells of rain. Occasionally strong southwesterly winds, turning more westerly later. Freezing levels above the summits.

Tue 21 Oct

Sunrise:
Sunset:

A mix of sunny spells and showers, the showers easing through the afternoon. Fresh westerly winds, turning more southerly and easing through the afternoon. Freezing level above the summits.

Updated at:

Summit specific forecast

Mountain summit forecast map

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