Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Some uncertainty in rain and cloud detail for the next few days then high confidence for it turning more unsettled and windier from mid-week.
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
Mainly cloudy with patchy rain. Light winds.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | 10% | 10% | 40% | 60% | 60% |
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
7
|
E
4
|
SE
6
|
SE
9
|
SE
8
|
SE
8
|
| 300m |
NE
2
|
NE
2
|
E
5
|
E
4
|
E
2
|
E
2
|
| Valley |
NW
1
|
NE
2
|
E
4
|
E
5
|
SE
2
|
NE
1
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 9 | 5 | 8 | 12 | 10 | 12 |
| 300m | 8 | 4 | 8 | 7 | 5 | 4 |
| Valley | 6 | 4 | 8 | 8 | 5 | 5 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
2°
|
3°
|
4°
|
5°
|
5°
|
6°
|
| 300m |
2°
|
4°
|
7°
|
8°
|
7°
|
6°
|
| Valley |
3°
|
5°
|
7°
|
9°
|
8°
|
7°
|
| Freezing Level |
1,000m
|
1,100m
|
1,600m
|
1,700m
|
1,800m
|
1,900m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
-1°
|
1°
|
2°
|
2°
|
2°
|
3°
|
| 300m |
1°
|
4°
|
5°
|
7°
|
6°
|
6°
|
| Valley |
2°
|
4°
|
6°
|
7°
|
7°
|
6°
|
Additional weather information
Meteorologist's view
Areas of low cloud on the tops may test navigation skills at times.
Weather
Mainly cloudy with a little light rain at times this morning. This afternoon outbreaks of light rain gradually become more widespread and hill fog becomes extensive. Some fleeting brightness is possible, mainly in the west and south this morning.
Chance of cloud-free hill tops
30%, best chance in west.
Low cloud and visibility
Widespread cloud above 600m, but some higher cloud bases at times. Visibility away from cloud mainly good, but reducing to a few km at times in any rain. Cloud and fog becoming extensive above 400m in evening.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 1.2mm | 2mm | 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
Outbreaks of rain, these mostly light but the odd brief heavy burst is possible overnight and early morning. Becoming largely dry by early afternoon but remaining generally cloudy, with perhaps a little late brightness developing by late afternoon. Late evening cloud thickens again to bring a chance of further patchy light rain.
Chance of cloud-free hill tops
10% becoming 60% in afternoon, then 40% through the evening.
Maximum wind speed expected
South or Southeast 15 to 20mph gusts 25mph.
Temperature
- At 600m Plus 6C rising to 9C.
- Valley Plus 7C rising to 11 to 13C.
- Freezing level Above summits.
Low cloud and visibility
Extensive cloud and fog above 300 or 400m, perhaps lower at first. Cloud rising above summits at times in the afternoon. Away from low cloud, visibility hazy or very hazy, reducing to nearby hills with rain.
Mountain weather information
Mon 9 Mar
Sunrise:
Sunset:
Mostly cloudy with outbreaks of rain, these rather light and sporadic. Widespread hill fog until late morning. Light and variable winds. Mild conditions with freezing level well above summits.
Tue 10 Mar
Sunrise:
Sunset:
Largely dry and cloudy with just a little patchy light rain, until a band of rain, heavy at times, arrives through the evening. Southerly winds gradually strengthening. Freezing level above summits.
Wed 11 Mar
Sunrise:
Sunset:
Heavy rain soon clearing, then broken cloud and a few showers. Strong winds slowly easing. Freezing level above the summits.
Updated at:
Summit specific forecast
Mountain summit forecast map
Loading map…
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.