Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for occasionally unsettled from Thursday with an east to southeast flow throughout, but lowering for timing detail of rain, any summit snow and strong winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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
Mainly dry with some brighter spells. Cold in fresh to strong summit winds.
| 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% | 20% | 20% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SE
15
|
SE
17
|
SE
19
|
E
19
|
E
20
|
E
22
|
| 300m |
E
6
|
E
5
|
E
9
|
E
10
|
E
10
|
E
13
|
| Valley |
E
5
|
E
4
|
E
9
|
E
9
|
E
8
|
E
12
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 22 | 23 | 25 | 25 | 29 | 30 |
| 300m | 14 | 13 | 18 | 20 | 22 | 26 |
| Valley | 12 | 12 | 18 | 21 | 21 | 25 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
2°
|
3°
|
4°
|
5°
|
4°
|
3°
|
| 300m |
1°
|
2°
|
6°
|
7°
|
6°
|
5°
|
| Valley |
2°
|
3°
|
6°
|
8°
|
6°
|
6°
|
| Freezing Level |
600m
|
800m
|
1,100m
|
1,100m
|
1,000m
|
1,000m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-2°
|
-2°
|
-2°
|
0°
|
-2°
|
-3°
|
| 300m |
-2°
|
-1°
|
3°
|
4°
|
2°
|
1°
|
| Valley |
-1°
|
1°
|
4°
|
5°
|
4°
|
2°
|
Additional weather information
Meteorologist's view
Gusts may be 10-15mph higher than the figures stated above at higher levels. These brisk winds will bring a cold feel, with warm layers essential. Highest summits may also remain frozen, with winter equipment recommended.
Weather
A mainly dry day with only a few light showers appearing, perhaps wintry during the morning above 800m. Some brighter spells developing, particularly for the afternoon and in the west.
Chance of cloud-free hill tops
60%
Low cloud and visibility
Cloud will obscure tops from around 400m, through the morning, lifting to 600m by the afternoon, with some breaks developing. Visibility will be moderate at first, but improving to be good at times through the afternoon, but falling to poor at times in showers.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 1.8mm | 1.8mm | 7.4mm |
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
Perhaps dry for a time at first. Otherwise periods of rain and summit snow, turning heavy at times. These bringing some significant winter conditions at height.
Chance of cloud-free hill tops
20% in east, 60% in west
Maximum wind speed expected
Easterly 30-40 mph with gusts 40-50mph.
Temperature
- At 600m Plus 2 Celsius
- Valley Plus 5 rising to Plus 9 Celsius for the afternoon
- Freezing level Above summits.
Low cloud and visibility
Extensive cloud at 600m in the east, with some areas down to 400m at times. This lifting to 800m across some western hills at times. Moderate to poor visibility for much of the day.
Mountain weather information
Fri 6 Feb
Sunrise:
Sunset:
Periods of rain, occasionally heavy, perhaps briefly sleet over higher hills. Strong easterly summit winds. Freezing level just above summits.
Sat 7 Feb
Sunrise:
Sunset:
Showers or longer periods of rain. Fresh to strong east to southeast summit winds. Freezing level above the summits
Sun 8 Feb
Sunrise:
Sunset:
Occasional rain, most persistent in the east. Fresh to strong southeasterly summit winds. Freezing level above the summits
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.