Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High
This evening forecast
Heavy rain and southerly gales.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Severe Chill Effect
Gales
Mountain weather forecast
Bright spells and occasional showers. Windy and chilly.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 600m) |
70% | 20% | 30% | 30% | 40% | 30% | 20% | 20% |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
W
27
|
W
25
|
W
23
|
W
23
|
W
22
|
W
20
|
W
19
|
SW
23
|
| 300m |
W
15
|
W
14
|
W
13
|
W
14
|
W
14
|
W
14
|
W
13
|
SW
14
|
| Valley |
W
14
|
W
13
|
W
12
|
W
13
|
W
14
|
W
13
|
W
11
|
SW
12
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m | 36 | 34 | 31 | 30 | 29 | 28 | 27 | 31 |
| 300m | 34 | 32 | 27 | 27 | 27 | 26 | 27 | 30 |
| Valley | 33 | 30 | 27 | 27 | 27 | 26 | 25 | 29 |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
6°
|
4°
|
3°
|
3°
|
4°
|
5°
|
4°
|
3°
|
| 300m |
9°
|
6°
|
5°
|
6°
|
8°
|
8°
|
6°
|
6°
|
| Valley |
10°
|
7°
|
6°
|
7°
|
8°
|
9°
|
7°
|
7°
|
| Freezing Level |
1,400m
|
1,000m
|
900m
|
900m
|
800m
|
900m
|
900m
|
1,000m
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
1°
|
-2°
|
-3°
|
-3°
|
-2°
|
0°
|
-2°
|
-3°
|
| 300m |
6°
|
2°
|
1°
|
2°
|
4°
|
5°
|
3°
|
2°
|
| Valley |
7°
|
4°
|
3°
|
4°
|
5°
|
6°
|
4°
|
3°
|
Additional weather information
Meteorologist's view
Nothing further to add.
Weather
Heavy overnight rain soon clearing. Generally bright with occasional showers and a few sunny breaks. Strong winds at height with a severe wind chill. Mainly dry with some clear spells in the evening.
Chance of cloud-free hill tops
80%, but lowering significantly in any showers.
Low cloud and visibility
Cloud mainly above the summits, lowering significantly in showers. Visibility mostly very good or excellent, but moderate to very poor in showers and cloud.
Recent rainfall
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.2mm | 3.2mm | 3.6mm |
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.
Mountain weather information
Weather
Mainly dry and cloudy overnight. A mainly dry start, but outbreaks of heavy and persistent rain developing during the morning, perhaps thundery at times later. Becoming stormy at height with severe wind chill and buffeting.
Chance of cloud-free hill tops
40%
Maximum wind speed expected
Southwest 40 to 50mph gusting 70mph, severe wind chilly and buffeting.
Temperature
- At 600m Plus 3 to 6
- Valley Plus 5 to 11 Celsius
- Freezing level Above the summits.
Low cloud and visibility
Extensive low cloud, base 400 to 700m. Visibility often moderate to very poor in cloud and rain.
Mountain weather information
Fri 13 Mar
Overnight rain soon clearing. Bright spells and occasional wintry showers. Fresh to strong west or southwest winds at height with a severe wind chill. Freezing level typically 600m, but could be lower at times, particularly late in the day.
Sat 14 Mar
The wintry showers well scattered overnight and during the morning with bright or clear spells. The wintry showers then becoming more widespread through the afternoon and evening. Moderate to fresh westerly winds at height with a significant wind chill. Feeling level typically 600 to 800m.
Sun 15 Mar
Occasional rain then wintry showers. Strong to gale force west or southwest winds with a significant wind chill. Freezing level mainly above the summits, falling 500m later.
Summit specific forecast
Mountain summit forecast map
The Bannau Brycheiniog / Brecon Beacons is a mountain range in South Wales comprising six main peaks, with the highest peak, Pen y Fan, standing at 886 metres.