Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for changeable weather for the next few days
This evening forecast
Dry and partly cloudy. Areas of low cloud down to 600 metres spreading from the west late evening.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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
Dry, cloudy and windy. Rain by evening.
| 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) |
00% | 00% | 00% | 20% | 20% | 60% | 60% | 30% |
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 |
SW
20
|
SW
21
|
SW
22
|
SW
24
|
SW
28
|
SW
29
|
SW
29
|
W
27
|
| 300m |
SW
13
|
SW
15
|
SW
16
|
SW
18
|
SW
20
|
SW
22
|
SW
20
|
W
19
|
| Valley |
SW
10
|
SW
12
|
SW
13
|
SW
16
|
SW
18
|
SW
19
|
SW
18
|
W
17
|
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 | 28 | 30 | 32 | 35 | 41 | 44 | 43 | 41 |
| 300m | 26 | 29 | 29 | 33 | 38 | 40 | 38 | 36 |
| Valley | 22 | 25 | 26 | 32 | 34 | 37 | 37 | 34 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
6°
|
6°
|
6°
|
7°
|
7°
|
7°
|
6°
|
4°
|
| 300m |
8°
|
8°
|
8°
|
9°
|
10°
|
9°
|
9°
|
6°
|
| Valley |
8°
|
9°
|
9°
|
10°
|
10°
|
10°
|
9°
|
6°
|
| Freezing Level |
2,300m
|
2,200m
|
1,800m
|
1,700m
|
2,000m
|
2,100m
|
1,800m
|
1,000m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
0°
|
1°
|
2°
|
2°
|
2°
|
2°
|
1°
|
-3°
|
| 300m |
4°
|
4°
|
5°
|
6°
|
6°
|
5°
|
5°
|
1°
|
| Valley |
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
6°
|
2°
|
Additional weather information
Meteorologist's view
Winds will strengthen through the day with summit gales by afternoon. Making progress will become slow will a risk of being blow over on the higher tops.
Weather
Most of the day will be dry and cloudy, a little light rain possible across the southwest of the area at times. Persistent rain will spread southeastwards from late afternoon onwards, clearing during the early evening. A few showers will follow on, turning wintry on the higher tops.
Chance of cloud-free hill tops
50%, best chance across the east of the area
Low cloud and visibility
Poor in areas of cloud down to 500 to 800 metres, lowest bases across the west of the area. Cloud more broken with higher bases towards the east.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0mm | 0mm |
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
Variable amounts of cloud and a few passing snow or hail showers. Strong to gale, bitterly cold northwesterly winds making for severe wind chill and slow progress.
Chance of cloud-free hill tops
80%
Maximum wind speed expected
Northwesterly average speeds of 35 mph with gusts to 50 mph on the higher tops
Temperature
- At 600m Minus 1 Celsius
- Valley 0 rising to 6 Celsius
- Freezing level 400 to 600 metres
Low cloud and visibility
Very good visibility with great air clarity. Some brief reductions in visibility as showers pass by. Cloud lowering to 850 metres at times otherwise cloud mostly above summits.
Mountain weather information
Thu 26 Mar
Sunrise:
Sunset:
Mainly dry, cloudy and cold. Perhaps the odd wintry shower around. Strong northwesterly winds easing.
Fri 27 Mar
Sunrise:
Sunset:
Cloud with occasional rain, this most likely at first and again later in the day.
Sat 28 Mar
Sunrise:
Sunset:
Mainly dry although rather cloudy.
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.