Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High overall. Main uncertainties are the location of the strongest gusts during Saturday evening. Moderate for frontal timings on Wednesday and Thursday.
This evening forecast
Storm Dave will bring a swathe of very strong winds this evening, and a small chance of severe gales for a time, depending on the track and shape of the storm. The strongest winds will be first thing this evening before gradually starting to ease from midnight. Heavy, blustery showers may also occur, these could turn wintry over high ground with a chance of hail and thunder.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Storm Force Winds
Gales
Severe Chill Effect
Poor Visibility
Thunderstorms
Heavy Persistent Rain
Strong Sunlight
Blizzards
Mountain weather forecast
Sunshine and showers. Mostly dry by the afternoon. Breezy throughout.
| 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) |
90% | 60% | 60% | 40% | 20% | 10% | 10% | 10% |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
W
28
|
W
19
|
W
17
|
W
24
|
W
21
|
W
22
|
W
15
|
SW
10
|
| 300m |
W
17
|
W
11
|
W
10
|
W
16
|
W
15
|
W
15
|
W
10
|
SW
6
|
| Valley |
W
15
|
W
9
|
W
9
|
W
14
|
W
14
|
W
13
|
W
10
|
SW
4
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m | 38 | 28 | 24 | 33 | 29 | 30 | 21 | 17 |
| 300m | 36 | 24 | 22 | 30 | 28 | 27 | 20 | 15 |
| Valley | 34 | 23 | 21 | 29 | 28 | 27 | 20 | 13 |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
2°
|
2°
|
4°
|
4°
|
3°
|
2°
|
| 300m |
6°
|
5°
|
4°
|
6°
|
7°
|
7°
|
6°
|
3°
|
| Valley |
7°
|
6°
|
5°
|
6°
|
8°
|
8°
|
7°
|
4°
|
| Freezing Level |
900m
|
900m
|
800m
|
700m
|
600m
|
600m
|
700m
|
700m
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-3°
|
-3°
|
-3°
|
-4°
|
-2°
|
-1°
|
-2°
|
-2°
|
| 300m |
1°
|
2°
|
1°
|
1°
|
3°
|
4°
|
3°
|
1°
|
| Valley |
3°
|
3°
|
2°
|
2°
|
5°
|
5°
|
4°
|
2°
|
Additional weather information
Meteorologist's view
Very windy upon summits during Saturday evening leading to difficult walking conditions. Winds lighter on Sunday though still a fresh breeze along summits.
Weather
A colder day ahead but with drier and brighter conditions. Patchy cloud likely throughout the day, with the risk of showers remaining, mainly through the morning.
Chance of cloud-free hill tops
60% gradually rising to 80% from afternoon onward.
Low cloud and visibility
Cloud bases generally above summits with patchy cloud at 500-700m covering summits at times through the morning. Very good visibility in general though may become poor in showers and very poor in low cloud or hill fog.
Recent rainfall
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 7.4mm | 8.8mm | 8.8mm |
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
A cold start with patchy frost in places. Then a settled day ahead and remaining dry. Sunny spells likely though a build of high cloud at times will create hazier spells of sunshine. Light winds though a moderate breeze across peaks later.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
30-35mph during the afternoon.
Temperature
- At 600m Zero Celsius rising to Plus 4.
- Valley Plus 4 Celsius rising to plus 10 Celsius.
- Freezing level Above summits.
Low cloud and visibility
A small chance of some isolated mist or fog patches to start then very little to no low cloud during the day and good to excellent visibility.
Mountain weather information
Tue 7 Apr
Dry with plenty of sunshine to start the day. A build of high cloud may create hazier spells of sunshine. Fresh to strong southeasterly winds. Turning light and variable later.
Wed 8 Apr
A cloudier day ahead with the potential for some showery outbreaks. Light winds to start. Becoming moderate southwesterly winds later.
Thu 9 Apr
Sunshine and showers. Moderate westerly winds.
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.