Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for unsettled weather conditions, but lowering for timing detail of worst of conditions. 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.
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.
Heavy Persistent Rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.
Mountain weather forecast
Cloudy with occasional rain and hill fog. Fresh summit winds.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
70% | 70% | 80% | 80% | 40% | 60% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SW
25
|
SW
20
|
SW
19
|
SW
17
|
SW
14
|
SW
13
|
| 300m |
SW
12
|
SW
9
|
SW
11
|
SW
10
|
SW
7
|
SW
7
|
| Valley |
SW
9
|
SW
7
|
SW
9
|
SW
8
|
SW
6
|
SW
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 32 | 26 | 25 | 22 | 19 | 18 |
| 300m | 28 | 22 | 22 | 19 | 17 | 17 |
| Valley | 24 | 19 | 20 | 19 | 16 | 16 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
3°
|
4°
|
4°
|
4°
|
3°
|
4°
|
| 300m |
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
| Valley |
6°
|
6°
|
7°
|
7°
|
6°
|
6°
|
| Freezing Level |
1,000m
|
1,100m
|
1,100m
|
1,200m
|
1,100m
|
1,100m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-3°
|
-2°
|
-2°
|
-1°
|
-1°
|
-1°
|
| 300m |
2°
|
3°
|
3°
|
4°
|
3°
|
3°
|
| Valley |
4°
|
4°
|
5°
|
5°
|
4°
|
4°
|
Additional weather information
Meteorologist's view
Navigation particularly challenging this morning in the quite extensive hill fog.
Weather
Cloudy with occasional spells of rain, these heavy at times this morning, though there may be a few isolated brighter spells developing late afternoon across eastern areas. Largely cloudy this evening with scattered showers arriving, locally heavy.
Chance of cloud-free hill tops
40% becoming 60-70% by late afternoon.
Low cloud and visibility
Very hazy or poor with rain, very poor with hill fog, otherwise generally hazy to good with distant hills visible. Extensive low cloud above 600-700m this morning, becoming fragmented above 700m this afternoon, with the best breaks across eastern areas.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 12.6mm | 21.8mm | 21.8mm |
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
Cloudy with outbreaks of rain arriving overnight and persisting through the morning. Dry and brighter conditions arrive from the west early to mid-afternoon. Dry through the evening with clear periods and patchy mist.
Chance of cloud-free hill tops
Decreasing 20% overnight and for the morning, improving 95% or more through the afternoon.
Maximum wind speed expected
West or southwest 20 mph 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
Very hazy or poor with rain, very poor with hill fog, otherwise generally hazy to good with distant hills visible then improving very good or excellent with visible hills clearly visible. Extensive low cloud above 500-600m quickly clearing through the afternoon.
Mountain weather information
Mon 2 Feb
Sunrise:
Sunset:
Mainly dry with extensive hill fog, perhaps patchy light rain. Strong summit winds.
Tue 3 Feb
Sunrise:
Sunset:
Spells of sometimes heavy rain. Extensive hill fog. Fresh summit winds.
Wed 4 Feb
Sunrise:
Sunset:
Generally cloudy with spells of rain likely, and also hill fog. Fresh summit winds.
Updated at:
Summit specific forecast
Mountain summit forecast map
Loading map…
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.