Mountain weather

Bannau Brycheiniog / Brecon Beacons

Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table

Confidence

High for Wednesday. Lower for the timing of rain risk later Thursday.

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

Dry and fine with plenty of sunshine into the day. Fresh summit winds.

Time 06:00 09:00 12:00 15:00 18:00 21:00
Weather
(at 600m)
Sunny intervals Sunny intervals Sunny day Sunny day Clear night Clear night
Chance of precipitation
(at 600m)
<05% <05% 00% 00% 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 SE
17
SE
16
SE
14
S
17
SE
16
S
18
300m E
3
E
3
SE
5
S
9
E
5
SE
6
Valley SE
1
SE
3
E
6
SE
8
E
5
E
4
Wind gust (mph)
Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m 26 23 19 21 23 27
300m 6 9 10 17 13 19
Valley 6 8 10 16 11 14

Altitude above mean sea level
Time 06:00 09:00 12:00 15:00 18:00 21:00
600m
300m
12°
12°
Valley
12°
13°
10°
Freezing Level
1,700m
1,600m
1,600m
1,600m
1,500m
1,500m

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

Additional weather information

Meteorologist's view

A generally fine day expected. Note some mild afternoon temperatures at valley level in the sunshine, contrasting with a significantly cool feel at height given the fresh breeze.

Weather

Dry, with patchy cloud to start clearing to give a fine day with clear skies and generally mild temperatures.

Chance of cloud-free hill tops

95%.

Low cloud and visibility

Some very patchy low cloud possible initially on lower slopes, most likely in the east of the range, but cloud bases generally well above summits. Visibility generally good, although perhaps slightly hazy.

Recent rainfall

Location: Neuadd (Near Pontsticill)
Altitude: 353m
Last 24 hoursLast 48 hoursLast 72 hours
0mm5.8mm8.8mm
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

Dry and bright start to the day. Cloud feeding from the west from mid-afternoon, with an area of occasionally heavy rain gradually crossing the area for the evening. Moderate to fresh summit winds.

Chance of cloud-free hill tops

80% becoming 20% for the evening.

Maximum wind speed expected

South or southeast 15-20mph with gusts reaching 30mph across most exposed ridges and summits.

Temperature

  • At 600m Plus 6 Celsius increasing 11 Celsius for the afternoon
  • Valley Plus 4 Celsius increasing 16 Celsius for the afternoon
  • Freezing level Above summits

Low cloud and visibility

Good or very good becoming moderate or poor in rain, very poor within cloud, this becoming extensive above around 500-800m into the evening.

Mountain weather information

Fri 6 Mar

Sunrise:
Sunset:

Cloudy with patchy rain for much of the day. Moderate to fresh winds. Freezing level above summits.

Sat 7 Mar

Sunrise:
Sunset:

Remaining generally cloudy with rain at times. Moderate to fresh winds. Freezing level above summits.

Sun 8 Mar

Sunrise:
Sunset:

Cloudy with further risk of rain, though most of this should be light and perhaps turning brighter into the day. Light winds. Freezing level above summits.

Updated at:

Summit specific forecast

Mountain summit forecast map

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