Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Confidence high for a mainly southeasterly airstream to persists with low pressure to the west of the United Kingdom. Confidence is lower for precipitation and cloud details, but moderate for the timing and extent of rain on Thursday. Please note we are aware of an issue affecting forecast wind speeds and gusts for higher-elevation sites (typically above 500m) displayed on the Met Office website and app. The winds shown here in our Mountain Area Forecasts are not affected by this. Our teams are actively working to correct the issue and updates will be deployed as soon as possible.
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
Clear or sunny spells and a few showers. Perhaps sleet on highest tops. Strengthening winds
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | 10% | 10% | 10% | <05% | <05% |
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
10
|
SE
13
|
SE
13
|
SE
13
|
SE
12
|
SE
15
|
| 300m |
SE
4
|
SE
3
|
SE
6
|
SE
7
|
E
4
|
E
5
|
| Valley |
E
2
|
E
2
|
SE
4
|
SE
5
|
E
4
|
E
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 13 | 18 | 17 | 17 | 20 | 23 |
| 300m | 12 | 9 | 12 | 14 | 12 | 11 |
| Valley | 7 | 5 | 10 | 12 | 12 | 12 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
2°
|
2°
|
3°
|
3°
|
2°
|
2°
|
| 300m |
3°
|
3°
|
6°
|
6°
|
3°
|
2°
|
| Valley |
3°
|
3°
|
7°
|
7°
|
4°
|
3°
|
| Freezing Level |
900m
|
900m
|
900m
|
900m
|
900m
|
900m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-3°
|
-3°
|
-2°
|
-1°
|
-2°
|
-3°
|
| 300m |
1°
|
1°
|
4°
|
4°
|
1°
|
0°
|
| Valley |
2°
|
1°
|
6°
|
6°
|
2°
|
1°
|
Additional weather information
Meteorologist's view
Feeling cold, especially across exposed routes and summits with the breeze leading to a sub-zero feel. Warm layers essential.
Weather
Clear or sunny spells for much of the day with one or two showers, these mainly light but with some sleet or brief wet snow possible above 800m. Showers fading during the evening, but a chance for some low cloud or mist and fog patches in the east, although routes above 400m are likely to remain above any cloud.
Chance of cloud-free hill tops
80%, falling to 40% in the east after dark.
Low cloud and visibility
Occasional cloud will obscure the odd summit above 600m through much of the day. More extensive low cloud moving into some eastern hills after dark, obscuring routes below 400m, but routes above this level likely rising above any cloud. Away from cloud, visibility will be generally very good, falling briefly to a kilometre or two in summit snow showers.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 17mm | 28.8mm | 30mm |
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
Any early mist, fog and low cloud across eastern hills lifting and clearing through the morning. Turning drier and brighter for a time, although cloud soon increasing, especially through the afternoon. Occasionally heavy rain then spreading east through the late afternoon and evening, perhaps briefly sleet above 800m, but soon turning to rain at all levels.
Chance of cloud-free hill tops
20% in the east at first. Otherwise 60%, but falling through the late afternoon and evening to near zero by midnight.
Maximum wind speed expected
Southeast 20-25mph, gusts around 40mph, increasing 30-35mph, gusts around 50mph.
Temperature
- At 600m Minus 1 Celsius rising to Plus 3 Celsius
- Valley Zero Celsius rising to Plus 6 Celsius
- Freezing level 800m rising above the summits through the evening
Low cloud and visibility
Areas of cloud above 200m, with some fog down to surface level in the east through the morning. Otherwise cloud occasionally obscuring tops above 600m, but some brighter spells. Into the evening, cloud, becoming more extensive at 600m, with some patches down to 400m with rain. Away from cloud visibility generally good falling to several kilometres in rain. Some poor visibility also likely in the east through the morning.
Mountain weather information
Fri 30 Jan
Sunrise:
Sunset:
Rain clearing overnight then sunny spells and showers. Strong southeast winds easing. Freezing level above the summits.
Sat 31 Jan
Sunrise:
Sunset:
Clear or sunny spells and a few showers. Mainly light winds. Freezing level above the summits.
Sun 1 Feb
Sunrise:
Sunset:
Rather cloudy with a few showers, these dying out later. Strengthening southeast 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.