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 worst of conditions.
This evening forecast
Mainly cloudy with patchy rain and summit snow. Cold at height in fresh southeasterly summit winds. Freezing level 1000m.
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 brighter spells. Cold at height in 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) |
30% | 30% | 30% | 40% | 20% | 10% | 10% | 10% |
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
13
|
SE
12
|
SE
14
|
SE
16
|
SE
19
|
SE
18
|
E
19
|
E
21
|
| 300m |
E
6
|
E
6
|
E
6
|
E
6
|
E
9
|
E
10
|
E
10
|
E
13
|
| Valley |
E
6
|
E
6
|
E
6
|
E
5
|
E
10
|
E
10
|
E
9
|
E
12
|
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 | 18 | 18 | 21 | 22 | 26 | 25 | 28 | 30 |
| 300m | 14 | 13 | 14 | 14 | 18 | 20 | 22 | 26 |
| Valley | 14 | 13 | 14 | 14 | 20 | 21 | 22 | 26 |
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°
|
3°
|
4°
|
5°
|
4°
|
3°
|
| 300m |
2°
|
2°
|
2°
|
3°
|
6°
|
7°
|
6°
|
5°
|
| Valley |
2°
|
2°
|
3°
|
4°
|
7°
|
8°
|
6°
|
6°
|
| Freezing Level |
1,100m
|
1,100m
|
1,100m
|
1,100m
|
1,000m
|
1,100m
|
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°
|
-2°
|
0°
|
-2°
|
-3°
|
| 300m |
-1°
|
-1°
|
-1°
|
0°
|
3°
|
4°
|
2°
|
1°
|
| Valley |
0°
|
0°
|
0°
|
2°
|
4°
|
5°
|
4°
|
2°
|
Additional weather information
Meteorologist's view
Gusts may be 10-15mph higher than the figures stated above at higher levels.
Weather
Mainly dry with only a few light showers appearing, these predominantly before mid-day and wintry across highest peaks. Brighter and sunny spells developing, most readily during the afternoon and in the west of the Park.
Chance of cloud-free hill tops
By day 50% becoming 75% for the afternoon
Low cloud and visibility
Moderate or poor in rain, very poor in snow and within cloud with bases occasional from 700m at first, before lifting and breaking during the afternoon.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.6mm | 8mm | 27.8mm |
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
Periods of rain and summit sleet, turning heavy at times, combining with fresh to strong summit winds, bringing very challenging conditions.
Chance of cloud-free hill tops
10-20%
Maximum wind speed expected
Easterly 25mph with gusts reaching 35-40mph across more exposed ridges and summits.
Temperature
- At 600m Plus 4 Celsius
- Valley Plus 4 rising to 7 Celsius for the afternoon
- Freezing level Above summits
Low cloud and visibility
Moderate or poor in rain, very poor within cloud with bases quite extensive from around 700m.
Mountain weather information
Fri 6 Feb
Sunrise:
Sunset:
Periods of rain, occasionally turning heavy. Fresh easterly summit winds.
Sat 7 Feb
Sunrise:
Sunset:
Showers or longer periods of rain. Fresh to strong east to southeast summit winds.
Sun 8 Feb
Sunrise:
Sunset:
Occasional rain, most persistent in the east. Moderate southeasterly summit winds.
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.