Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for changeable weather to continue this weekend and into next week. Low confidence for detail of rainfall on a daily basis.
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
Mostly cloudy with a chance of a few showers, these mainly this morning.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
30% | 30% | 20% | 20% | 10% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
S
17
|
S
16
|
S
18
|
S
15
|
SE
13
|
SE
14
|
| 300m |
SE
5
|
E
4
|
SE
7
|
SE
5
|
SE
6
|
SE
5
|
| Valley |
E
4
|
SE
3
|
SE
5
|
SE
4
|
SE
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 | 23 | 22 | 22 | 19 | 19 | 19 |
| 300m | 13 | 10 | 15 | 13 | 15 | 13 |
| Valley | 8 | 7 | 11 | 10 | 13 | 10 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
3°
|
3°
|
4°
|
4°
|
4°
|
3°
|
| 300m |
4°
|
4°
|
6°
|
7°
|
5°
|
4°
|
| Valley |
5°
|
4°
|
7°
|
7°
|
5°
|
4°
|
| Freezing Level |
1,000m
|
1,000m
|
1,000m
|
1,100m
|
1,100m
|
1,000m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-3°
|
-2°
|
-2°
|
0°
|
-1°
|
-1°
|
| 300m |
2°
|
2°
|
4°
|
5°
|
3°
|
2°
|
| Valley |
3°
|
3°
|
6°
|
6°
|
3°
|
3°
|
Additional weather information
Meteorologist's view
Slight windchill on the summits.
Weather
Mainly dry and cloudy, but with the chance of a few showers, these mainly this morning. This afternoon some limited bright or sunny intervals may develop. Widespread low cloud and hill fog, especially across eastern areas this at first this morning, gradually lifting today only to quickly return this evening.
Chance of cloud-free hill tops
40% improving 70% this afternoon but quickly decreasing 40% again this evening.
Low cloud and visibility
Poor or very poor in areas of cloud down to 300-400 metres at times, most extensive this morning and again after dark across eastern areas. Otherwise good or very good visibility, with distant hills visible, and with patchy cloud above 700 metres.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 2mm | 2.4mm | 4.4mm |
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 overnight and at first in the morning, although with a fair amount of low cloud shrouding the lower slopes with fog in the valleys. Outbreaks of rain are then likely to arrive through the morning, heavy at times, and persist through the afternoon. However, western areas may remain dry through the morning until the rain probably becomes more widespread through the afternoon. Widespread low cloud and hill fog will accompany the rain.
Chance of cloud-free hill tops
50%, with higher summits possibly protruding above the cloud overnight, more especially across the west of the Park. Through the day decreasing 30% from the east.
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 or very poor in areas of cloud between 300 and 400 metres, becoming more extensive down to 600 metres with the rain.
Mountain weather information
Mon 19 Jan
Sunrise:
Sunset:
Currently a largely dry day is expected but this may change with rain potentially arriving from the east at times. Light winds.
Tue 20 Jan
Sunrise:
Sunset:
Probably cloudy with spells of rain at times. Strengthening southeast winds, with fresh to strong winds likely developing.
Wed 21 Jan
Sunrise:
Sunset:
Remaining windy with the chance of further spells of rain.
Updated at:
Summit specific forecast
Mountain summit forecast map
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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.