Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for changeable weather to continue into early next week. Low for detail on Saturday.
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.
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.
Mountain weather forecast
Cloudy with occasional rain, becoming drier through the evening
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
30% | 30% | 70% | 70% | 30% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SW
24
|
SW
25
|
SW
25
|
SW
27
|
SW
23
|
SW
21
|
| 300m |
SW
15
|
SW
16
|
SW
17
|
SW
17
|
SW
14
|
SW
13
|
| Valley |
SW
12
|
SW
14
|
SW
15
|
SW
14
|
SW
12
|
W
11
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 31 | 33 | 34 | 36 | 32 | 31 |
| 300m | 30 | 31 | 32 | 33 | 29 | 27 |
| Valley | 28 | 30 | 31 | 31 | 28 | 26 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
9°
|
9°
|
10°
|
10°
|
9°
|
7°
|
| 300m |
11°
|
10°
|
11°
|
12°
|
11°
|
9°
|
| Valley |
11°
|
11°
|
12°
|
12°
|
11°
|
9°
|
| Freezing Level |
2,800m
|
2,800m
|
2,700m
|
2,100m
|
2,300m
|
1,200m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
5°
|
5°
|
6°
|
6°
|
5°
|
2°
|
| 300m |
8°
|
8°
|
8°
|
9°
|
8°
|
6°
|
| Valley |
9°
|
8°
|
9°
|
10°
|
9°
|
7°
|
Additional weather information
Meteorologist's view
Strong winds on the highest tops will make progress slow at times with drenching conditions in rain.
Weather
A cloudy day with occasional outbreaks of rain, this persistent at times across western slopes. A narrow band of more persistent rain moves east across the park in the late afternoon and early evening with clearer, dry conditions to follow.
Chance of cloud-free hill tops
Little chance until evening, when improving to 90%.
Low cloud and visibility
Poor in rain and extensive cloud down to 600 to 800 metres, lowest bases across the west of the Park. Hill fog clearing from the west through the evening.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 4.6mm | 4.6mm | 7.8mm |
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
A windy day with variable amounts of cloud and occasional heavy showers, with a chance of hail and some high summit sleet or wet snow.
Chance of cloud-free hill tops
60%
Maximum wind speed expected
Southwesterly average speeds of 30-35 mph with gusts to 40 mph on the summits.
Temperature
- At 600m Plus 5 Celsius
- Valley Plus 6 rising to 9 Celsius
- Freezing level Above summits
Low cloud and visibility
Good visibility outside of cloud and rain. Areas of cloud above 800 metres shrouding the highest tops at times. Occasionally falling poor with cloud lowering to 700 metres in showers, with some patches down to 600 metres on western upslopes.
Mountain weather information
Sat 29 Nov
Sunrise:
Sunset:
Low confidence for detail but the potential for a spell of strong winds and heavy rain to move northeast across the park. The rain may turn wintry across the summits for a time.
Sun 30 Nov
Sunrise:
Sunset:
Drier and brighter but chilly. Winds lighter northwesterly backing southerly later. Freezing levels just below summits for a time.
Mon 1 Dec
Sunrise:
Sunset:
Heavy rain moving east, occasional heavy showers to follow later. Windy with a high chance of gales across the summits. Freezing levels rising 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.