Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for east to southeast flow persisting also for quite unsettled, but lowering for timing detail of worst of conditions.
This evening forecast
Periods of rain and summit sleet, turning heavier at times. Cold at height in fresh to strong easterly summit winds and a freezing level around 1100m.
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
Cloudy with occasional rain and summit sleet. 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) |
70% | 70% | 60% | 70% | 70% | 60% | 40% | 50% |
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
14
|
S
15
|
SW
14
|
SW
13
|
SW
15
|
W
15
|
W
13
|
SW
12
|
| 300m |
SE
8
|
S
9
|
SW
8
|
SW
7
|
SW
10
|
W
9
|
SW
7
|
SW
7
|
| Valley |
SE
7
|
SE
7
|
SW
7
|
SW
6
|
SW
8
|
W
8
|
SW
6
|
SW
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 | 21 | 21 | 21 | 18 | 21 | 21 | 18 | 16 |
| 300m | 17 | 18 | 17 | 16 | 19 | 19 | 16 | 15 |
| Valley | 18 | 18 | 16 | 16 | 18 | 19 | 16 | 13 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
3°
|
4°
|
3°
|
4°
|
4°
|
4°
|
3°
|
| 300m |
6°
|
5°
|
5°
|
5°
|
6°
|
7°
|
6°
|
5°
|
| Valley |
6°
|
6°
|
6°
|
6°
|
7°
|
7°
|
6°
|
6°
|
| Freezing Level |
1,200m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,100m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-1°
|
-1°
|
-1°
|
-1°
|
-1°
|
0°
|
-1°
|
-1°
|
| 300m |
3°
|
2°
|
3°
|
3°
|
3°
|
4°
|
3°
|
3°
|
| Valley |
4°
|
4°
|
4°
|
4°
|
4°
|
5°
|
4°
|
4°
|
Additional weather information
Meteorologist's view
Navigation particularly challenging during the morning in the quite extensive hill fog.
Weather
Rather cloudy with occasional spells of rain, occasionally sleety above around 800m, though there may be a few isolated brighter spells breaking through for the afternoon.
Chance of cloud-free hill tops
20% becoming 30-40% by late afternoon
Low cloud and visibility
Good or very good, becoming moderate or poor in rain, very poor within cloud with bases quiet extensive from 600m, before lifting and breaking a little during the afternoon
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 11.6mm | 12.2mm | 18.6mm |
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
Cloudy with further outbreaks of rain, most persistent late in the day. Relatively light summit winds.
Chance of cloud-free hill tops
20%
Maximum wind speed expected
West or southwest 15mph or less
Temperature
- At 600m Plus 4 Celsius
- Valley Plus 3 increasing 10 Celsius for the afternoon
- Freezing level Above summits
Low cloud and visibility
Good becoming moderate or poor in rain, very poor in snow and within cloud with bases quiet extensive from 500m
Mountain weather information
Mon 2 Feb
Sunrise:
Sunset:
Patchy light rain. Strong summit winds. Freezing level 900-1000 metres.
Tue 3 Feb
Sunrise:
Sunset:
Occasional rain and summit sleet. Fresh southeast summit winds. Freezing level 900 metres.
Wed 4 Feb
Sunrise:
Sunset:
Occasional rain and summit sleet. Fresh to strong 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.