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.
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 with fairly extensive cloud. Strong winds giving significant wind chill.
| Time | 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% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
E
19
|
NE
18
|
NE
18
|
NE
21
|
E
23
|
E
21
|
| 300m |
NE
11
|
NE
12
|
NE
13
|
NE
13
|
NE
13
|
NE
12
|
| Valley |
NE
11
|
NE
10
|
NE
11
|
NE
11
|
E
12
|
E
11
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 27 | 24 | 24 | 27 | 31 | 30 |
| 300m | 20 | 21 | 25 | 24 | 25 | 23 |
| Valley | 20 | 20 | 22 | 23 | 26 | 23 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-2°
|
-2°
|
-2°
|
0°
|
0°
|
0°
|
| 300m |
0°
|
-1°
|
0°
|
2°
|
2°
|
1°
|
| Valley |
0°
|
0°
|
2°
|
2°
|
2°
|
2°
|
| Freezing Level |
200m
|
100m
|
300m
|
400m
|
500m
|
400m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-10°
|
-9°
|
-8°
|
-7°
|
-7°
|
-6°
|
| 300m |
-5°
|
-6°
|
-5°
|
-3°
|
-3°
|
-4°
|
| Valley |
-4°
|
-5°
|
-3°
|
-2°
|
-2°
|
-3°
|
Additional weather information
Meteorologist's view
Strong winds at height combined with low temperatures will make for significant wind chill. Be prepared for sudden strong gusts on lee slopes.
Weather
Dry throughout with fairly extensive cloud, but some clear or sunny spells remain possible.
Chance of cloud-free hill tops
40%
Low cloud and visibility
Excellent visibility outside of cloud, but very poor in cloud. Areas of cloud between 400 and 700 metres. Highest summits may be above the top of the cloud.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0.2mm | 0.2mm |
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
Remaining dry and settled. Sunny spells at first giving way to thicker cloud as the day goes on, but some uncertainty in this aspect. Cold winds at height leading to significant wind chill. Higher summits are likely to be above the top of the cloud.
Chance of cloud-free hill tops
80% becoming 40%,best chance of clear skies towards the west.
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 5 Celsius
- Freezing level Above the summits
Low cloud and visibility
Very good visibility outside of cloud, but very poor in cloud. Areas of cloud developing between 400-700 metres.
Mountain weather information
Sun 28 Dec
Sunrise:
Sunset:
Dry and mostly cloudy. Freezing level lowering around 600m. Fresh easterly winds.
Mon 29 Dec
Sunrise:
Sunset:
Remaining mostly dry but largely cloudy with light winds. Freezing level 500-600m. Moderate to fresh northeasterly winds.
Tue 30 Dec
Sunrise:
Sunset:
Little change, remaining mostly dry with variable amounts of cloud. Freezing level 500-600m. Moderate northeasterly 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.