Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for settled conditions initially. Low for details toward the weekend with the risk of thunderstorms from Friday onwards.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Gales
Severe Chill Effect
Mountain weather forecast
Dry with plenty of sunshine and brisk winds.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | <05% | <05% | <05% | <05% | <05% |
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
E
25
|
E
21
|
SE
21
|
SE
20
|
SE
18
|
SE
18
|
| 300m |
E
7
|
E
13
|
E
13
|
SE
11
|
SE
7
|
E
6
|
| Valley |
E
5
|
E
12
|
E
13
|
E
11
|
SE
7
|
E
5
|
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 38 | 31 | 29 | 28 | 26 | 29 |
| 300m | 22 | 22 | 24 | 22 | 17 | 15 |
| Valley | 18 | 23 | 25 | 23 | 19 | 16 |
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
9°
|
10°
|
14°
|
16°
|
15°
|
12°
|
| 300m |
6°
|
12°
|
18°
|
19°
|
17°
|
12°
|
| Valley |
7°
|
13°
|
18°
|
20°
|
18°
|
12°
|
| Freezing Level |
1,800m
|
2,100m
|
2,100m
|
2,100m
|
2,400m
|
2,700m
|
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
4°
|
7°
|
10°
|
12°
|
11°
|
9°
|
| 300m |
4°
|
10°
|
14°
|
16°
|
15°
|
11°
|
| Valley |
6°
|
11°
|
15°
|
17°
|
16°
|
11°
|
Additional weather information
Meteorologist's view
Given the time of year, sunshine will become quite strong, so sun protection is advised. There will be a chilly wind on the hill tops first thing, so layers advised. Winds may be 5-10mph stronger than suggested in the table over summits causing buffeting.
Weather
A fine day with lots of sunshine. Some high cloud may create hazier spells of sunshine at times, mostly in western areas of the park. Winds lighter than Wednesday but still rather brisk, though gradually easing into the evening. It's set to be a warm day, and UV levels will be moderate to high, though brisk winds will make it feel a lot cooler across summits.
Chance of cloud-free hill tops
95%
Low cloud and visibility
A chance of some shallow mist and fog in sheltered valleys around dawn, temporarily reducing visibility. Otherwise excellent visibility across scenic viewpoints.
Recent rainfall
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0mm | 0mm |
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
Cloudier on Friday with sporadic bursts of rain or showers spreading north-eastwards through the day, carrying the risk of thunder through the afternoon but location detail uncertain. Feeling warm and humid with much lighter winds than of late.
Chance of cloud-free hill tops
80% at dawn, dropping to 30% by mid-afternoon.
Maximum wind speed expected
Southeasterly 15-20 mph.
Temperature
- At 600m Plus 9 Celsius rising to Plus 16 Celsius.
- Valley Plus 7 Celsius rising to Plus 21 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Patchy low cloud down to 500-800 m, lowing further during the afternoon and deteriorating further in any heavy downbursts. Very good visibility to start, dropping to poor in low cloud and precipitation.
Mountain weather information
Sat 2 May
Low cloud to start, then hazy sunshine. Showery rain possible at times during the afternoon. Light winds and feeling humid.
Sun 3 May
Low confidence in detail. Changeable with showery, thundery rain at times.
Mon 4 May
Remaining unsettled with showers or longer spells of rain, again carrying the risk of thunder. Light winds.
Summit specific forecast
Mountain summit forecast map
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.