Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for the mobile nature of the westerly weather patterns, but lowering for the transitional timing detail.
This evening forecast
Cloudy to overcast with occasional rain, most of this focused west of Pen Y Fan. Relatively light winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Severe Chill Effect
Mountain weather forecast
Cloudy with occasional rain. Moderate summit winds.
| 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) |
80% | 80% | 90% | 40% | 30% | 40% | 20% | 10% |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
NW
9
|
NW
12
|
N
11
|
N
9
|
N
10
|
N
9
|
N
8
|
NE
9
|
| 300m |
W
7
|
NW
7
|
NW
6
|
NW
5
|
NW
7
|
N
6
|
N
4
|
NE
5
|
| Valley |
W
8
|
NW
6
|
NW
6
|
NW
5
|
NW
6
|
N
5
|
N
4
|
NE
4
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m | 12 | 16 | 15 | 13 | 14 | 13 | 12 | 14 |
| 300m | 12 | 12 | 11 | 9 | 11 | 10 | 9 | 10 |
| Valley | 14 | 12 | 12 | 10 | 11 | 10 | 10 | 8 |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
2°
|
2°
|
3°
|
5°
|
4°
|
3°
|
| 300m |
6°
|
5°
|
4°
|
4°
|
7°
|
8°
|
6°
|
5°
|
| Valley |
7°
|
6°
|
5°
|
5°
|
8°
|
9°
|
7°
|
6°
|
| Freezing Level |
1,900m
|
1,700m
|
1,200m
|
1,400m
|
1,400m
|
1,500m
|
1,400m
|
1,600m
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
1°
|
-2°
|
-3°
|
-2°
|
0°
|
2°
|
1°
|
0°
|
| 300m |
3°
|
2°
|
2°
|
2°
|
4°
|
6°
|
5°
|
4°
|
| Valley |
4°
|
4°
|
2°
|
3°
|
6°
|
8°
|
6°
|
5°
|
Additional weather information
Meteorologist's view
Severe wind chill effect confined to higher routes.
Weather
Overcast overnight with periods of generally light rain. Rain persistent during the early morning, patchy from mid-morning and early evening, then largely dry through the rest of the evening.
Chance of cloud-free hill tops
20% becoming 50% from late morning
Low cloud and visibility
Good or very good becoming moderate or poor in rain, very poor within cloud, which will be extensive from 500m early morning, occasionally so thereafter.
Recent rainfall
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.2mm | 0.2mm | 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
Cloudy to overcast with patchy light rain, which turns more persistent late afternoon and through the evening. Light or moderate winds.
Chance of cloud-free hill tops
25%
Maximum wind speed expected
South or southeast 15-20mph
Temperature
- At 600m Zero Celsius increasing 4 Celsius for the afternoon
- Valley Plus 3 Celsius increasing 12 Celsius for the afternoon
- Freezing level 800m at dawn, soon lifting above summits during the morning
Low cloud and visibility
Good or very good becoming moderate or poor in rain, very poor within cloud, which will be quite extensive from 500m.
Mountain weather information
Sun 8 Mar
Rather cloudy with some patchy light rain. Moderate winds. Freezing level above summits.
Mon 9 Mar
Cloudy with occasional rain, though most of this should be light and a chance of some brighter spells later in the day. Light winds. Freezing level above summits.
Tue 10 Mar
Cloudy with occasional rain, turning heavier later in the day. Fresh summit winds. Freezing level above summits.
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.