Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for a changeable conditions with rain at times to persist well into next week, but low for detail in position and timing of any particular rain bands. Low for wind strength in the outlook.
This evening forecast
A dry evening with some clear spells. However cloud will build from the west, lowering onto the tops early in the night. Southwest winds freshening across the tops from late evening.
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
Low cloud and outbreaks of rain.
| 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) |
20% | 10% | 10% | 60% | 80% | 80% | 60% | 60% |
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
17
|
S
19
|
S
21
|
S
22
|
S
22
|
S
20
|
S
15
|
S
12
|
| 300m |
S
9
|
SW
11
|
S
11
|
S
13
|
S
14
|
S
10
|
S
9
|
S
6
|
| Valley |
SW
6
|
S
8
|
S
7
|
S
11
|
S
11
|
S
8
|
S
7
|
SE
5
|
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 | 23 | 26 | 29 | 30 | 31 | 27 | 20 | 16 |
| 300m | 20 | 23 | 24 | 27 | 28 | 22 | 19 | 13 |
| Valley | 17 | 20 | 20 | 27 | 25 | 20 | 18 | 11 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
7°
|
7°
|
7°
|
8°
|
9°
|
9°
|
8°
|
8°
|
| 300m |
9°
|
9°
|
9°
|
10°
|
11°
|
11°
|
10°
|
10°
|
| Valley |
10°
|
10°
|
10°
|
11°
|
12°
|
12°
|
10°
|
10°
|
| Freezing Level |
2,000m
|
2,000m
|
2,000m
|
2,200m
|
2,200m
|
2,200m
|
2,000m
|
1,900m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
3°
|
3°
|
3°
|
4°
|
5°
|
6°
|
5°
|
6°
|
| 300m |
7°
|
7°
|
7°
|
8°
|
9°
|
9°
|
8°
|
9°
|
| Valley |
8°
|
8°
|
8°
|
9°
|
10°
|
10°
|
9°
|
9°
|
Additional weather information
Meteorologist's view
Some uncertainty in timing of onset of rain and intensity. A small chance rain cloud clear east late afternoon.
Weather
Dry but cloudy through the early hours. Outbreaks of rain turn increasingly persistent and occasionally heavy through the morning. This likely to persist through much of the afternoon and evening.
Chance of cloud-free hill tops
10% or less.
Low cloud and visibility
Very poor visibility on the tops with cloud likely to be persistent above 400m, lower on southern slopes.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 1.6mm | 5.8mm | 8.2mm |
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
Low cloud and outbreaks of rain through the early hours. This likely to clear before dawn, although some low cloud likely to persist on the tops and southern aspects. A band of heavy rain then spreads north, most likely in the afternoon, but timing uncertain. Becoming dry in the evening, although any breaks in low cloud likely to be temporary.
Chance of cloud-free hill tops
60% in the morning, 30% in the afternoon
Maximum wind speed expected
Southwest 15-20 gusting 25 mph, falling light and variable late afternoon and evening.
Temperature
- At 600m Plus 7 Celsius
- Valley Plus 8 Celsius rising to 10 Celsius
- Freezing level Above the summits.
Low cloud and visibility
Generally good visibility in the morning, although occasional patches of cloud above 400m, later 600m. Visibility falling poor in the afternoon in heavy rain, with cloud lowering to around 500m.
Mountain weather information
Tue 11 Nov
Sunrise:
Sunset:
Strong south or southwest winds with outbreaks of rain, possibly heavy at times, although a chance of some dry spells too.
Wed 12 Nov
Sunrise:
Sunset:
Further rain or showers, perhaps heavy at times. South becoming southwest winds, most likely lighter than on Tuesday.
Thu 13 Nov
Sunrise:
Sunset:
South or southwest winds continuing, with a chance of showers but some dry and brighter spells likely.
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.