Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for increasingly unsettled and windy conditions through this period. Lower confidence for cloud and rain details which become more uncertain as we go through the week.
This evening forecast
Outbreaks of rain and drizzle with extensive cloud down to low slopes giving difficult navigation conditions. Light winds.
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.
Mountain weather forecast
Low cloud and occasional rain. A little brightness in west. Mild with light 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) |
40% | 40% | 40% | 40% | 40% | 40% | 40% | 40% |
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
4
|
SE
7
|
SE
5
|
SE
9
|
S
12
|
S
13
|
S
18
|
S
19
|
| 300m |
E
2
|
E
2
|
E
2
|
E
4
|
SE
4
|
S
5
|
SE
7
|
S
11
|
| Valley |
E
1
|
NE
2
|
E
1
|
E
3
|
E
4
|
SE
3
|
E
5
|
SE
7
|
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 | 5 | 8 | 7 | 11 | 16 | 16 | 24 | 25 |
| 300m | 3 | 4 | 3 | 7 | 9 | 11 | 17 | 22 |
| Valley | 4 | 5 | 4 | 7 | 9 | 11 | 11 | 17 |
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°
|
5°
|
5°
|
4°
|
4°
|
| 300m |
4°
|
4°
|
4°
|
4°
|
6°
|
7°
|
5°
|
6°
|
| Valley |
5°
|
4°
|
4°
|
5°
|
7°
|
7°
|
6°
|
6°
|
| Freezing Level |
1,500m
|
1,500m
|
1,400m
|
1,400m
|
1,400m
|
1,500m
|
1,300m
|
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 |
2°
|
2°
|
2°
|
1°
|
1°
|
1°
|
-1°
|
-1°
|
| 300m |
3°
|
3°
|
3°
|
3°
|
5°
|
5°
|
3°
|
2°
|
| Valley |
4°
|
4°
|
4°
|
4°
|
5°
|
6°
|
4°
|
4°
|
Additional weather information
Meteorologist's view
Difficult navigation conditions expected for most of the day, especially in the east, although improving at times in the west.
Weather
Mainly cloud and misty with occasional rain or drizzle, this mostly light in nature. There is some uncertainty in the details but the best chance of any dry and bright breaks in the weather will be in the morning towards the west of the National Park.
Chance of cloud-free hill tops
20%, a small chance in the west. Becoming 60% in evening.
Low cloud and visibility
Extensive cloud and fog above 200 or 300m but breaking up at times across the west of the Park with some spells of good visibility possible, mainly in the morning. Cloud lifting to the summits in the evening.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 2.2mm | 4mm | 4.4mm |
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
Largely dry with a few bright or clear intervals. The main feature will be the strengthening southerly winds with severe gales on the tops in the afternoon and evening making walking arduous and difficult. Outbreaks of rain spread east during the evening.
Chance of cloud-free hill tops
60%.
Maximum wind speed expected
South or Southeast 20 gusts 30mph increasing to 40-45mph gusts 60mph in afternoon.
Temperature
- At 600m Plus 2 or 3C.
- Valley Plus 6 to 8C.
- Freezing level Above summits.
Low cloud and visibility
Occasional cloud cover above 600m with mainly good visibility away from cloud.
Mountain weather information
Wed 21 Jan
Sunrise:
Sunset:
Rather cloudy with occasional rain but there could be a period of drier and brighter weather during the day. Very windy with severe gale force southerly winds on the tops. Freezing level just above summits.
Thu 22 Jan
Sunrise:
Sunset:
Mainly cloudy with showers or longer spells of rain. Strong southerly winds gradually easing. Freezing level above summits.
Fri 23 Jan
Sunrise:
Sunset:
Remaining unsettled with showers or longer spells of rain. Fresh southerly winds on the tops. 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.