Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Please note we are aware of an issue affecting forecast wind speeds and gusts for higher-elevation sites (typically above 500m) displayed on the Met Office website and app. The winds shown here in our Mountain Area Forecasts are not affected by this. Our teams are actively working to correct the issue and updates will be deployed as soon as possible. High confidence for unsettled, cold and windy conditions throughout this period. Lower for daily rain and snow details, especially from Tuesday.
This evening forecast
Outbreaks of rain, heavy at times with sleet or snow above 700m. Very cold with gale force southeast winds, gusts 40-50mph on the tops. Freezing level just above summits.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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
Cloudy with rain or summit snow. Feeling cold with strong easterly winds on the tops.
| 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) |
80% | 80% | 30% | 60% | 60% | 60% | 60% | 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 |
S
20
|
S
19
|
SE
20
|
SE
19
|
SE
16
|
E
14
|
E
11
|
E
12
|
| 300m |
S
10
|
SE
7
|
E
6
|
E
8
|
E
8
|
E
7
|
E
4
|
E
6
|
| Valley |
S
8
|
SE
4
|
E
6
|
E
7
|
E
8
|
E
7
|
E
4
|
E
6
|
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 | 26 | 30 | 26 | 21 | 19 | 16 | 16 |
| 300m | 22 | 20 | 18 | 19 | 16 | 16 | 12 | 13 |
| Valley | 21 | 14 | 16 | 18 | 16 | 15 | 11 | 14 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
3°
|
2°
|
2°
|
2°
|
2°
|
2°
|
2°
|
2°
|
| 300m |
6°
|
4°
|
3°
|
4°
|
5°
|
5°
|
4°
|
4°
|
| Valley |
6°
|
4°
|
4°
|
5°
|
6°
|
6°
|
5°
|
5°
|
| Freezing Level |
1,100m
|
800m
|
900m
|
900m
|
900m
|
900m
|
1,000m
|
900m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-4°
|
-4°
|
-4°
|
-3°
|
-2°
|
-2°
|
-2°
|
| 300m |
2°
|
1°
|
0°
|
2°
|
2°
|
3°
|
3°
|
2°
|
| Valley |
4°
|
2°
|
1°
|
2°
|
3°
|
4°
|
4°
|
3°
|
Additional weather information
Meteorologist's view
A cold day in the hills, even at modest elevations, with a severe wind chill on the tops. Winds gusting 30 to 40mph above 600m during the morning.
Weather
Rain, with snow above 700m, clearing in the early hours then dry with clear spells for a time. A cloudy day with outbreaks of rain, heavy at times and falling as sleet or snow above 700m. Rain or snow easing during the easing.
Chance of cloud-free hill tops
30%.
Low cloud and visibility
Frequent cloud above 600 or 700m, clearing for a time in the early hours, becoming more persistent above 500m in the evening. Away from low cloud, visibility occasionally a few kilometres or less in rain or snow.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 12.6mm | 20.8mm | 31.6mm |
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
Mostly dry and cloudy through the day, perhaps the odd spot of rain or summit snow. Winds will strengthen with rain, sleet and snow arriving in the afternoon or evening but low confidence in timings. Feeling bitterly cold with a severe wind chill.
Chance of cloud-free hill tops
30%.
Maximum wind speed expected
East or SE 20 to 25mph gusts 30mph, increasing 30mph gusts 50mph later on ridges and summits.
Temperature
- At 600m Plus 1 or 2C.
- Valley Plus 6 or 7C.
- Freezing level 800m.
Low cloud and visibility
Rather extensive cloud above 500 or 600m. Otherwise mainly good visibility for most of the day becoming widely poor late in the day with a chance of blizzards on the tops.
Mountain weather information
Tue 27 Jan
Sunrise:
Sunset:
Heavy spells of sleet and snow with southerly gales and blizzards at first. Becoming brighter with a few wintry showers in the afternoon. Freezing level 600m, rising to above summits later
Wed 28 Jan
Sunrise:
Sunset:
Dry and bright start then rain, sleet or summit snow spreading east later. Strong southerly winds. Freezing level just above summits.
Thu 29 Jan
Sunrise:
Sunset:
Remaining unsettled and windy with periods of rain or hill snow.
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.