Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for settled conditions for the next few days, but low for cloud amounts.
This evening forecast
Dry with variable amounts of cloud. Strong, cold winds at height.
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
Dry and cold with sunny spells
| 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) |
00% | 00% | 00% | 00% | 00% | 00% | 00% | 00% |
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 |
E
26
|
E
23
|
E
20
|
E
21
|
NE
23
|
NE
21
|
NE
22
|
E
22
|
| 300m |
E
13
|
E
12
|
NE
11
|
NE
12
|
NE
15
|
NE
13
|
NE
13
|
E
12
|
| Valley |
E
12
|
E
10
|
E
9
|
E
9
|
E
13
|
NE
11
|
E
12
|
E
11
|
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 | 36 | 33 | 29 | 31 | 31 | 29 | 32 | 32 |
| 300m | 27 | 24 | 22 | 24 | 28 | 25 | 28 | 25 |
| Valley | 27 | 22 | 22 | 23 | 26 | 24 | 27 | 25 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-3°
|
-3°
|
-2°
|
-1°
|
-1°
|
0°
|
0°
|
0°
|
| 300m |
-1°
|
-1°
|
-1°
|
-1°
|
2°
|
2°
|
1°
|
1°
|
| Valley |
0°
|
0°
|
-1°
|
-1°
|
2°
|
3°
|
2°
|
1°
|
| Freezing Level |
100m
|
100m
|
0m
|
100m
|
300m
|
400m
|
400m
|
400m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-11°
|
-11°
|
-10°
|
-9°
|
-8°
|
-7°
|
-7°
|
-7°
|
| 300m |
-6°
|
-6°
|
-6°
|
-7°
|
-4°
|
-2°
|
-4°
|
-4°
|
| Valley |
-5°
|
-4°
|
-5°
|
-5°
|
-2°
|
-1°
|
-2°
|
-3°
|
Additional weather information
Meteorologist's view
Strong winds at height combined with low temperatures will make for significant wind chill.
Weather
Dry throughout with some clear or sunny spells and variable amounts of cloud.
Chance of cloud-free hill tops
50%
Low cloud and visibility
Excellent visibility outside of cloud. Areas of cloud between 450 and 700 metres at times through the day.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0.2mm | 1mm |
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
Remaining dry and settled. There may be a fair amount of low cloud throughout the day but low confidence in this aspect of the forecast. Cold winds at height leading to significant wind chill.
Chance of cloud-free hill tops
40%
Maximum wind speed expected
Easterly average speeds 30 mph with gusts to 40 mph on the tops
Temperature
- At 600m Plus 3 Celsius
- Valley Minus 1 Celsius rising to 6 Celsius
- Freezing level Above the summits
Low cloud and visibility
Very good visibility outside of cloud. Poor in areas of cloud between 500 and 700 metres.
Mountain weather information
Sun 28 Dec
Sunrise:
Sunset:
Cold, dry and settled with variable cloud cover.
Mon 29 Dec
Sunrise:
Sunset:
Little change, remaining dry and settled.
Tue 30 Dec
Sunrise:
Sunset:
Dry and settled with variable amounts of cloud.
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.