Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for changeable weather to continue over the weekend and into next week. Low confidence for detail of rainfall on a daily basis.
This evening forecast
Scattered showers and strong, cold southerly winds. Cloud shrouding summits down to 600 metres at times.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
Mountain weather forecast
Cloudy at times with the chance of showers, mainly in the morning
| 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) |
40% | 40% | 40% | 40% | 30% | 30% | 20% | 20% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
SE
16
|
SE
14
|
SE
14
|
SE
14
|
SE
16
|
SE
13
|
SE
12
|
SE
12
|
| 300m |
SE
7
|
SE
5
|
SE
5
|
SE
5
|
SE
8
|
SE
6
|
SE
5
|
SE
6
|
| Valley |
SE
5
|
SE
4
|
E
4
|
E
5
|
SE
6
|
SE
5
|
E
5
|
SE
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m | 22 | 19 | 19 | 20 | 21 | 18 | 17 | 17 |
| 300m | 17 | 13 | 13 | 12 | 16 | 14 | 12 | 12 |
| Valley | 13 | 10 | 10 | 11 | 13 | 13 | 12 | 12 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
3°
|
3°
|
3°
|
3°
|
4°
|
4°
|
3°
|
3°
|
| 300m |
5°
|
4°
|
4°
|
4°
|
6°
|
6°
|
4°
|
4°
|
| Valley |
5°
|
4°
|
4°
|
4°
|
6°
|
7°
|
5°
|
5°
|
| Freezing Level |
1,100m
|
1,000m
|
1,000m
|
1,000m
|
1,000m
|
1,000m
|
1,100m
|
1,000m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-2°
|
-2°
|
-2°
|
-1°
|
0°
|
-1°
|
-1°
|
| 300m |
2°
|
2°
|
2°
|
2°
|
4°
|
4°
|
3°
|
2°
|
| Valley |
3°
|
3°
|
3°
|
2°
|
4°
|
5°
|
3°
|
3°
|
Additional weather information
Meteorologist's view
Nothing to add
Weather
Often cloudy through the morning with a chance of passing showers. The afternoon will be dry with some clear or sunny intervals developing. Dry through the evening.
Chance of cloud-free hill tops
50%, best chance in the afternoon
Low cloud and visibility
Poor in areas of cloud down to 500 metres at times, these most extensive during the morning and again after dark. Otherwise good visibility with patchy cloud above 800 metres.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.4mm | 2.8mm | 2.8mm |
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.
Mountain weather information
Weather
Mainly dry in the morning although a fair amount of low cloud shrouding the lower slopes with fog in the valleys. Thickening cloud may bring a chance of rain for a time in the afternoon but low confidence in this aspect of the forecast. Otherwise remaining dry.
Chance of cloud-free hill tops
50%, higher summits may stand above the cloud more especially across the west of the Park
Maximum wind speed expected
Southeast 10 mph
Temperature
- At 600m Plus 4 Celsius
- Valley Minus 2 rising to 7 Celsius
- Freezing level Above summits
Low cloud and visibility
Poor in areas of cloud between 200 and 500 metres, this tending to clear through the afternoon although may become more extensive down to 600 metres should rain arrive from the east in the afternoon.
Mountain weather information
Mon 19 Jan
Sunrise:
Sunset:
After a dry start rain will spread from the west for a time. Colder, drier weather following on through the afternoon. Further rain may spread northeast through the evening.
Tue 20 Jan
Sunrise:
Sunset:
Cloudy and windy with rain at times.
Wed 21 Jan
Sunrise:
Sunset:
Remaining windy with the chance of further spells of rain.
Updated at:
Summit specific forecast
Mountain summit forecast map
Loading map…
Key
Mountain summits
Other points of interest
Cluster of multiple stations
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.