Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for east to southeast flow persisting also for occasionally unsettled, but lowering for timing detail of worst of conditions.
This evening forecast
Periods of rain, snow initially across highest tops. Strong summit winds.
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.
Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Mountain weather forecast
Mainly dry by day. Rain developing into the evening. Fresh 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) |
90% | 80% | 50% | 20% | 20% | 20% | 80% | 80% |
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
21
|
S
14
|
S
15
|
S
14
|
S
17
|
SE
19
|
E
20
|
E
18
|
| 300m |
E
7
|
E
4
|
S
5
|
S
7
|
SE
8
|
E
9
|
E
10
|
E
10
|
| Valley |
E
8
|
E
4
|
SE
3
|
SE
4
|
SE
6
|
E
9
|
E
9
|
E
10
|
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 | 27 | 19 | 20 | 19 | 22 | 26 | 28 | 26 |
| 300m | 17 | 10 | 16 | 18 | 17 | 19 | 21 | 22 |
| Valley | 18 | 9 | 13 | 14 | 13 | 20 | 22 | 22 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
2°
|
4°
|
4°
|
4°
|
4°
|
5°
|
4°
|
4°
|
| 300m |
4°
|
4°
|
5°
|
6°
|
7°
|
7°
|
6°
|
6°
|
| Valley |
4°
|
5°
|
5°
|
6°
|
8°
|
8°
|
7°
|
7°
|
| Freezing Level |
1,300m
|
1,200m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,200m
|
1,200m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-3°
|
-1°
|
-1°
|
-1°
|
-1°
|
0°
|
-2°
|
-1°
|
| 300m |
1°
|
3°
|
3°
|
3°
|
5°
|
5°
|
3°
|
3°
|
| Valley |
1°
|
4°
|
4°
|
5°
|
7°
|
5°
|
4°
|
4°
|
Additional weather information
Meteorologist's view
Low cloud will make for navigational difficulties in the east.
Weather
Periods of occasionally heavy rain at first overnight, breaking to only a few scattered showers towards dawn. Only a few scattered light showers through the day, with best of the limited brighter spells developing across the west of the park. Cloud and patchy rain feeding from the south from early evening.
Chance of cloud-free hill tops
By day 60% in west 30% in east
Low cloud and visibility
Moderate or poor in rain, very poor within cloud with bases quite extensive from around 600m across eastern areas of the Park.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.6mm | 7mm | 29.4mm |
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
Rather cloudy start with some patchy light rain which will be focused in the east, though there will be an increasing chance of brighter spells breaking through for the afternoon. Summit winds moderate.
Chance of cloud-free hill tops
Beginning 40% in east, 60% in west becoming 70% in east, 85% in west late in day
Maximum wind speed expected
Easterly 15 mph or less
Temperature
- At 600m Plus 4-5 Celsius
- Valley Plus 5 rising to 11 Celsius
- Freezing level 1000-1100 metres
Low cloud and visibility
Good or very good, becoming moderate or poor in rain, very poor within cloud with bases quiet extensive from 600m in the east
Mountain weather information
Sun 1 Feb
Sunrise:
Sunset:
Mainly dry and partly cloudy. Light winds. Freezing level 1000 metres.
Mon 2 Feb
Sunrise:
Sunset:
Periods of rain developing and turning heavy later in the day. Strong to gale summit winds. Freezing level 900 metres.
Tue 3 Feb
Sunrise:
Sunset:
Occasional rain and summit snow. Fresh east or southeast summit winds. Freezing level 900 metres.
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.