Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for generally southeast flow persisting also for unsettled weather, but lowering for timing detail of worst of conditions.
This evening forecast
Scattered showers and partly cloudy. Moderate or fresh south or southeast summit winds. Freezing level 1100m.
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.
Mountain weather forecast
Showers or longer periods of rain and summit snow, turning heavy at times. Fresh or strong summit winds.
| 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) |
30% | 90% | 80% | 70% | 80% | 70% | 40% | 20% |
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 |
SE
17
|
SE
17
|
S
15
|
SE
16
|
S
20
|
S
17
|
S
17
|
SW
16
|
| 300m |
SE
5
|
E
6
|
SE
6
|
SE
7
|
S
9
|
S
10
|
S
10
|
SW
10
|
| Valley |
SE
4
|
E
7
|
E
5
|
SE
5
|
S
7
|
S
8
|
S
9
|
SW
8
|
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 | 24 | 24 | 21 | 22 | 27 | 24 | 23 | 23 |
| 300m | 15 | 15 | 16 | 17 | 21 | 20 | 20 | 19 |
| Valley | 12 | 16 | 13 | 14 | 18 | 19 | 20 | 18 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
4°
|
4°
|
4°
|
6°
|
6°
|
5°
|
4°
|
| 300m |
5°
|
5°
|
6°
|
7°
|
8°
|
8°
|
7°
|
7°
|
| Valley |
5°
|
6°
|
6°
|
7°
|
9°
|
9°
|
8°
|
7°
|
| Freezing Level |
1,100m
|
1,300m
|
1,300m
|
1,400m
|
1,400m
|
1,400m
|
1,400m
|
1,300m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-1°
|
-1°
|
0°
|
0°
|
1°
|
1°
|
0°
|
0°
|
| 300m |
3°
|
3°
|
4°
|
4°
|
6°
|
6°
|
4°
|
4°
|
| Valley |
4°
|
3°
|
4°
|
6°
|
7°
|
7°
|
5°
|
5°
|
Additional weather information
Meteorologist's view
Difficult conditions in rain, extensive hill fog and across higher routes a severe wind chill.
Weather
A cloudy to overcast day with frequent showers or longer periods of rain that turn heavy at times. Turning drier through the evening, with some clear spells developing.
Chance of cloud-free hill tops
20-30% by day
Low cloud and visibility
Good becoming moderate or poor in rain, very poor within cloud with bases quite extensive from 500m by day
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 15.2mm | 26.8mm | 27.8mm |
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
Rather cloudy with scattered showers. Some brighter spells, mainly appearing through the afternoon. Summit winds moderate to fresh.
Chance of cloud-free hill tops
20% becoming 40% for the afternoon
Maximum wind speed expected
South or southwest 15-25mph
Temperature
- At 600m Plus 4-5 Celsius
- Valley Plus 5 Celsius rising to 11 Celsius for the afternoon
- Freezing level Above summits
Low cloud and visibility
Good becoming moderate or poor in rain, very poor within cloud with bases quite extensive from 500m at first, before lifting and breaking somewhat during the afternoon.
Mountain weather information
Mon 9 Feb
Sunrise:
Sunset:
Rather cloudy with showers that merge to longer periods of rain later in the day. Fresh or strong southeast summit winds developing later. Freezing level above summits.
Tue 10 Feb
Sunrise:
Sunset:
Periods of rain, heavy at times. Fresh southeast summit winds. Freezing level above summits.
Wed 11 Feb
Sunrise:
Sunset:
Periods of rain, heavy at times. Southeast summit winds fresh or strong. 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.