Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for generally mild and rather unsettled weather. Lowering confidence for the timing detail of the worst of the conditions.
This evening forecast
Patchy light rain, above 600m snow, largely dying out by late evening. Summit winds increasing to a strong westerly.
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.
Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
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
Rain for morning, showers in afternoon. Summit gales.
| 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) |
10% | 20% | 30% | 90% | 70% | 40% | 30% | 60% |
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 |
W
16
|
SW
17
|
SW
23
|
SW
29
|
SW
30
|
W
29
|
W
26
|
W
24
|
| 300m |
W
8
|
W
11
|
SW
12
|
SW
16
|
SW
18
|
W
18
|
W
15
|
SW
14
|
| Valley |
W
6
|
W
8
|
SW
9
|
SW
13
|
SW
16
|
W
16
|
W
13
|
W
12
|
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 | 26 | 28 | 32 | 37 | 40 | 40 | 37 | 34 |
| 300m | 23 | 27 | 28 | 35 | 36 | 37 | 33 | 30 |
| Valley | 21 | 24 | 26 | 33 | 35 | 36 | 31 | 29 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
2°
|
2°
|
3°
|
4°
|
7°
|
6°
|
6°
|
6°
|
| 300m |
3°
|
4°
|
5°
|
6°
|
9°
|
9°
|
8°
|
8°
|
| Valley |
3°
|
4°
|
6°
|
7°
|
10°
|
10°
|
8°
|
9°
|
| Freezing Level |
800m
|
800m
|
1,100m
|
1,700m
|
1,500m
|
1,300m
|
1,300m
|
1,400m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-4°
|
-3°
|
-3°
|
-2°
|
1°
|
1°
|
0°
|
1°
|
| 300m |
-1°
|
0°
|
1°
|
2°
|
6°
|
6°
|
4°
|
5°
|
| Valley |
1°
|
1°
|
3°
|
4°
|
7°
|
7°
|
5°
|
6°
|
Additional weather information
Meteorologist's view
Winds 10-15mph stronger than the figures stated above across more exposed ridges and summits. Conditions very difficult for the morning in extensive hill fog, summit gales, driving rain and severe wind chill at height.
Weather
Some patchy light rain and summit snow overnight. A mainly cloudy morning with occasional rain that turns heavy at times. A mix of brighter spells and scattered showers for the afternoon. Thickening cloud and further periods of rain returning for the evening.
Chance of cloud-free hill tops
10-20% becoming 50% for the afternoon
Low cloud and visibility
Moderate or poor in rain, very poor in snow and within cloud with bases quite extensive from around 500m through the morning. Before lifting and breaking up somewhat for the afternoon.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 7mm | 9.6mm | 10.4mm |
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
A cloudy to overcast day bringing showers or longer periods of rain which turn heavy at times. Strong to gale summit winds.
Chance of cloud-free hill tops
10-20%
Maximum wind speed expected
West to southwest 30-35mph with gusts reaching 50-55mph across most exposed ridges and summits
Temperature
- At 600m Plus 7-8 Celsius
- Valley Plus 8 Celsius rising to 13 Celsius for the afternoon
- Freezing level Above summits
Low cloud and visibility
Moderate or poor in rain, very poor within cloud with bases quite extensive from around 500m.
Mountain weather information
Sun 22 Feb
Sunrise:
Sunset:
Rain at first. Brighter spells and scattered showers from late morning. Strong summit winds. Freezing level above summits.
Mon 23 Feb
Sunrise:
Sunset:
Mainly dry, occasionally bright start. Rain reaching from the west from around mid-day. Strong to gale summit winds. Freezing level above summits.
Tue 24 Feb
Sunrise:
Sunset:
Rain at first, heavy with extensive hill fog, clearing for a time later in the day. Strong to gale summit winds. 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.