Mountain weather

Bannau Brycheiniog / Brecon Beacons

Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table

Confidence

High for settled weather on Saturday. Moderate for cloud amounts on Sunday and shower detail on Monday.

Sunrise:
Sunset:
Mountain hazards

Mountain weather hazards

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

hazard Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.

Mountain weather forecast

Cold but sunny start, then dry with lengthy sunny spells.

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

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

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
10°
12°
10°
Valley
11°
12°
11°
Freezing Level
600m
700m
1,000m
1,200m
1,300m
1,100m

Altitude above mean sea level
06:00 09:00 12:00 15:00 18:00 21:00
600m
-1°
300m
10°
11°
Valley
10°
12°
10°

Additional weather information

Meteorologist's view

Warm layers advisable with a cold start and windchill at height. Sunscreen also recommend with moderate UV levels.

Weather

A chilly start this morning with some mist and fog patches in the valleys. Dry with plenty of sunshine through today and some variable cloud at times this afternoon. Generally light northerly winds and feeling chilly at height.

Chance of cloud-free hill tops

95% becoming 100% this morning.

Low cloud and visibility

Mist and fog patches in the valleys first thing, otherwise any cloud generally developing above highest routes. Very good to excellent visibility.

Recent rainfall

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

Clear at first but overnight cloud will creep in from the east. During the day western areas will have the best of the brightness, while it will be cloudier further east. Here cloud will thicken through the afternoon, bringing a chance of patchy light rain and drizzle later in the afternoon and into the evening.

Chance of cloud-free hill tops

80%, best in the west in the morning.

Maximum wind speed expected

Northeasterly 10 mph, gusting 15-20 mph.

Temperature

  • At 600m Plus 2 Celsius rising to Plus 6 Celsius.
  • Valley Plus 5 Celsius rising to Plus 11 Celsius.
  • Freezing level Above summits.

Low cloud and visibility

Cloud generally above summits but cloud may shroud higher routes through the afternoon at times. Good visibility for much of the day outside of this cloud, but falling to Moderate or Poor in any light rain or drizzle later.

Mountain weather information

Mon 22 Apr

Sunrise:
Sunset:

Cloudy with outbreaks of rain arriving, and low cloud developing widely. Later becoming dry but remaining cloudy. Winds becoming light northeasterly with freezing level above summits.

Tue 23 Apr

Sunrise:
Sunset:

Cloud breaking to leave sunnier spells into the afternoon with the odd shower. Light to moderate northeasterly winds. Freezing level above summits.

Wed 24 Apr

Sunrise:
Sunset:

Often cloudy on Wednesday with a low chance of a shower. Brightest in the west of the park. Light to moderate northwesterly winds.

Updated at:

Summit specific forecast

Mountain summit forecast map

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