Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for Wednesday. Lower for the timing of rain risk later Thursday.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.
Mountain weather forecast
Dry and fine with plenty of sunshine into the day. Fresh summit winds.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | 00% | 00% | 00% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
SE
17
|
SE
16
|
SE
14
|
S
17
|
SE
16
|
S
18
|
| 300m |
E
3
|
E
3
|
SE
5
|
S
9
|
E
5
|
SE
6
|
| Valley |
SE
1
|
SE
3
|
E
6
|
SE
8
|
E
5
|
E
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 26 | 23 | 19 | 21 | 23 | 27 |
| 300m | 6 | 9 | 10 | 17 | 13 | 19 |
| Valley | 6 | 8 | 10 | 16 | 11 | 14 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
6°
|
9°
|
9°
|
8°
|
7°
|
| 300m |
3°
|
5°
|
12°
|
12°
|
9°
|
7°
|
| Valley |
3°
|
6°
|
12°
|
13°
|
10°
|
8°
|
| Freezing Level |
1,700m
|
1,600m
|
1,600m
|
1,600m
|
1,500m
|
1,500m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
2°
|
2°
|
5°
|
6°
|
4°
|
2°
|
| 300m |
2°
|
4°
|
11°
|
11°
|
8°
|
6°
|
| Valley |
2°
|
5°
|
11°
|
12°
|
9°
|
6°
|
Additional weather information
Meteorologist's view
A generally fine day expected. Note some mild afternoon temperatures at valley level in the sunshine, contrasting with a significantly cool feel at height given the fresh breeze.
Weather
Dry, with patchy cloud to start clearing to give a fine day with clear skies and generally mild temperatures.
Chance of cloud-free hill tops
95%.
Low cloud and visibility
Some very patchy low cloud possible initially on lower slopes, most likely in the east of the range, but cloud bases generally well above summits. Visibility generally good, although perhaps slightly hazy.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 5.8mm | 8.8mm |
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
Dry and bright start to the day. Cloud feeding from the west from mid-afternoon, with an area of occasionally heavy rain gradually crossing the area for the evening. Moderate to fresh summit winds.
Chance of cloud-free hill tops
80% becoming 20% for the evening.
Maximum wind speed expected
South or southeast 15-20mph with gusts reaching 30mph across most exposed ridges and summits.
Temperature
- At 600m Plus 6 Celsius increasing 11 Celsius for the afternoon
- Valley Plus 4 Celsius increasing 16 Celsius for the afternoon
- Freezing level Above summits
Low cloud and visibility
Good or very good becoming moderate or poor in rain, very poor within cloud, this becoming extensive above around 500-800m into the evening.
Mountain weather information
Fri 6 Mar
Sunrise:
Sunset:
Cloudy with patchy rain for much of the day. Moderate to fresh winds. Freezing level above summits.
Sat 7 Mar
Sunrise:
Sunset:
Remaining generally cloudy with rain at times. Moderate to fresh winds. Freezing level above summits.
Sun 8 Mar
Sunrise:
Sunset:
Cloudy with further risk of rain, though most of this should be light and perhaps turning brighter into the day. Light winds. 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.