Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence that high pressure will bring a lot of dry, settled and very mild weather over the next few days. There is some uncertainty in day to day cloud amounts.
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 mostly sunny. Windy on the tops. Very mild.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
00% | 00% | 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
14
|
SE
13
|
SE
18
|
SE
17
|
SE
11
|
E
13
|
| 300m |
SE
3
|
E
3
|
E
8
|
E
6
|
E
4
|
E
5
|
| Valley |
S
1
|
E
3
|
E
9
|
E
8
|
E
4
|
E
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 17 | 20 | 22 | 22 | 16 | 21 |
| 300m | 6 | 10 | 13 | 11 | 12 | 12 |
| Valley | 7 | 10 | 16 | 14 | 14 | 13 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
10°
|
9°
|
12°
|
13°
|
12°
|
10°
|
| 300m |
4°
|
8°
|
14°
|
16°
|
12°
|
9°
|
| Valley |
4°
|
8°
|
15°
|
17°
|
12°
|
9°
|
| Freezing Level |
1,800m
|
1,900m
|
2,100m
|
2,100m
|
2,100m
|
2,100m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
7°
|
6°
|
9°
|
10°
|
9°
|
7°
|
| 300m |
3°
|
7°
|
13°
|
15°
|
11°
|
8°
|
| Valley |
2°
|
8°
|
13°
|
15°
|
12°
|
8°
|
Additional weather information
Meteorologist's view
Dry with plenty of sunshine and feeling very mild on lower slopes with highs of 15 to 17 Celsius. Cool and breezy on the tops.
Weather
Any overnight valley fog soon clearing, otherwise a dry day with plenty of sunshine, this becoming hazy at times in the afternoon. Dry evening with clear skies.
Chance of cloud-free hill tops
95%.
Low cloud and visibility
Mainly good visibility. Some patches of valley fog at first but these soon clearing.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.2mm | 4.6mm | 9.2mm |
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
Dry with clear spells overnight then Thursday will remain dry and sunny. A chilly start then becoming very mild again in the valleys, but feeling cooler on the tops in the easterly breeze.
Chance of cloud-free hill tops
100%.
Maximum wind speed expected
East or Southeast 15 to 20mph gusts 30mph.
Temperature
- At 600m Plus 7C rising to 11 or 12C during daytime.
- Valley Plus 4C rising to 15 or 16C.
- Freezing level Above summits.
Low cloud and visibility
Good visibility with no cloud expected.
Mountain weather information
Fri 20 Mar
Sunrise:
Sunset:
High pressure will continue to bring dry weather with plenty of sunshine and light winds. Mild by day and rather chilly overnight. Freezing level above summits.
Sat 21 Mar
Sunrise:
Sunset:
Remaining dry with bright or sunny spells and light winds. Mild by day and rather chilly overnight. Freezing level above summits.
Sun 22 Mar
Sunrise:
Sunset:
Dry and bright with light winds. A small chance of some rain and stronger winds later. 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.