Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Moderate for low cloud on Saturday. High for changeable weather into next week.
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
Isolated snow showers dying away.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
20% | 20% | 10% | 10% | 00% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
NW
10
|
NW
9
|
W
6
|
W
6
|
S
6
|
S
10
|
| 300m |
W
4
|
W
3
|
W
3
|
W
2
|
S
5
|
S
6
|
| Valley |
W
5
|
W
4
|
W
3
|
W
2
|
S
3
|
E
2
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 15 | 11 | 10 | 8 | 8 | 14 |
| 300m | 11 | 9 | 7 | 5 | 6 | 12 |
| Valley | 11 | 9 | 7 | 5 | 6 | 7 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-1°
|
-1°
|
0°
|
0°
|
0°
|
-1°
|
| 300m |
0°
|
0°
|
2°
|
3°
|
1°
|
0°
|
| Valley |
1°
|
1°
|
3°
|
4°
|
1°
|
0°
|
| Freezing Level |
500m
|
500m
|
600m
|
700m
|
600m
|
600m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-5°
|
-5°
|
-3°
|
-2°
|
-4°
|
-6°
|
| 300m |
-2°
|
-2°
|
1°
|
2°
|
-2°
|
-3°
|
| Valley |
-2°
|
-1°
|
2°
|
3°
|
-1°
|
-2°
|
Additional weather information
Meteorologist's view
Remaining very cold with lying snow and icy surfaces.
Weather
Small chance of isolated snow showers at first. Then dry with variable amounts of cloud. Remaining very cold with icy surfaces.
Chance of cloud-free hill tops
60% increasing 90%
Low cloud and visibility
Areas of cloud down to 500 to 700 metres this morning with poor or very poor visibility, this tending to become more broken this afternoon but some of the higher tops may still be shrouded in cloud.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 5.8mm | 13.2mm | 14.2mm |
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
Rain, briefly preceded by snow, will quickly extend east later in the night. Then the rest of the day will be overcast with spells of rain, heavy at times. Lying snow will thaw through the day with a chance of flooded watercourses.
Chance of cloud-free hill tops
90% at first rapidly decreasing to 0%.
Maximum wind speed expected
Southerly average speeds 30 mph with gusts to 45 mph on the summits.
Temperature
- At 600m Zero Celsius rising to 8 Celsius
- Valley 0 rising to 10 Celsius
- Freezing level 500 metres at first, quickly rising above summits
Low cloud and visibility
Quickly decreasing poor or very poor with extensive cloud down to 400 to 600 metres arriving and then persisting.
Mountain weather information
Mon 12 Jan
Sunrise:
Sunset:
Cloudy with showers or occasionally longer spells of rain. Freezing level above summits. `
Tue 13 Jan
Sunrise:
Sunset:
Some showery rain or snow at first, otherwise a drier day with bright spells. Freezing level above summits.
Wed 14 Jan
Sunrise:
Sunset:
Dry with variable amounts of cloud. Freezing level above 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.