Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for Wednesday daytime then lower confidence for the track of weather fronts and a low pressure system over the United Kingdom on Wednesday night and Thursday. High for colder conditions later in the 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.
Heavy Persistent Rain
Heavy and persistent rain can lead to drenched clothing and footwear with waterproofs often becoming soaked through, especially if accompanied by strong winds. This can lead to significant loss of body heat and an increased likelihood of hypothermia. Terrain may turn increasingly boggy underfoot while streams can flood and become impassable. There may also be a risk of flooding in valleys or glens. If there is snow cover, a heightened avalanche hazard is possible and avalanche reports should be consulted where available.
Mountain weather forecast
Sunny spells and a few showers. Light winds during daytime. Rain arriving in evening.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | 20% | 20% | 20% | 30% | 70% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
W
7
|
SW
7
|
SW
8
|
S
9
|
SE
10
|
E
13
|
| 300m |
SW
5
|
SW
4
|
SW
6
|
S
6
|
E
4
|
E
7
|
| Valley |
SW
4
|
SW
4
|
SW
5
|
S
4
|
E
4
|
E
6
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 11 | 9 | 11 | 12 | 14 | 18 |
| 300m | 9 | 8 | 10 | 11 | 10 | 14 |
| Valley | 10 | 8 | 10 | 8 | 10 | 14 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
6°
|
8°
|
8°
|
7°
|
6°
|
| 300m |
8°
|
9°
|
11°
|
11°
|
9°
|
8°
|
| Valley |
8°
|
10°
|
12°
|
12°
|
10°
|
9°
|
| Freezing Level |
1,400m
|
1,400m
|
1,500m
|
1,600m
|
1,600m
|
1,700m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
4°
|
4°
|
6°
|
6°
|
4°
|
3°
|
| 300m |
6°
|
8°
|
10°
|
10°
|
8°
|
7°
|
| Valley |
7°
|
9°
|
11°
|
11°
|
9°
|
8°
|
Additional weather information
Meteorologist's view
Generally good hillwalking conditions during the day but conditions deteriorating quickly after dark with rain and strong winds arriving.
Weather
A bright day with sunny spells and isolated showers, these dying out through the afternoon. Rain will spread north during the evening turning heavy with strengthening winds.
Chance of cloud-free hill tops
80%, becoming 30% in evening.
Low cloud and visibility
Mainly excellent visibility with just slight reductions in any showers. Cloud expected to stay mostly above the tops but some patches above 600m early morning. Cloud becoming more extensive above 600m in the evening as heavy rain reduces the visibility to moderate or poor.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 3mm | 10.6mm | 34mm |
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
Spells of rain overnight and during the morning then showers in the afternoon and evening, turning to sleet or snow above 700m. Feeling much colder with a severe wind-chill in the severe gale force north-westerly winds.
Chance of cloud-free hill tops
20% overnight and morning becoming 70% in afternoon
Maximum wind speed expected
North or Northwest 35 to 45mph gusts 60mph.
Temperature
- At 600m Plus 3C.
- Valley Pus 8 or 9C.
- Freezing level Above summits.
Low cloud and visibility
Frequent cloud and fog above 700m overnight and during the morning then lifting and breaking up in the afternoon. Outside of cloud, poor visibility at times during the morning then becoming good in afternoon.
Mountain weather information
Fri 24 Oct
Sunrise:
Sunset:
Mainly cloudy with showers, perhaps merging into a longer spells of rain. Feeling cold with strong northerly winds.
Sat 25 Oct
Sunrise:
Sunset:
A cold day with bright spells and frequent showers, wintry above 600m. A severe wind chill with strong northwest winds. Freezing level above summits.
Sun 26 Oct
Sunrise:
Sunset:
Sunny spells and a few passing showers, these lighter than on Saturday. Remaining cold with a severe wind chill at height. Freezing level 700m, rising above summits during daytime.
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.