Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High overall. Confidence lowers towards the end of the week for extent of wind and rain.
This evening forecast
Remaining dry this evening with clear skies. Turning breezier, particularly across summits.
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.
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
Dry and settled with hazy sunny spells.
| 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) |
<05% | <05% | <05% | <05% | <05% | <05% | <05% | <05% |
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 |
SE
22
|
SE
23
|
SE
22
|
SE
23
|
SE
22
|
SE
22
|
SE
16
|
S
16
|
| 300m |
SE
6
|
SE
6
|
E
7
|
E
7
|
SE
10
|
SE
14
|
SE
7
|
SE
5
|
| Valley |
E
5
|
NE
5
|
SE
6
|
E
9
|
E
11
|
SE
11
|
SE
6
|
SE
4
|
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 | 34 | 33 | 32 | 32 | 29 | 29 | 24 | 22 |
| 300m | 20 | 16 | 13 | 15 | 21 | 27 | 15 | 15 |
| Valley | 12 | 15 | 18 | 15 | 20 | 24 | 13 | 10 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
8°
|
8°
|
8°
|
10°
|
14°
|
16°
|
14°
|
12°
|
| 300m |
6°
|
6°
|
6°
|
12°
|
18°
|
19°
|
16°
|
12°
|
| Valley |
5°
|
6°
|
6°
|
12°
|
18°
|
20°
|
16°
|
13°
|
| Freezing Level |
2,200m
|
2,100m
|
2,400m
|
2,600m
|
2,500m
|
2,400m
|
2,500m
|
2,500m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
3°
|
4°
|
4°
|
7°
|
10°
|
11°
|
11°
|
9°
|
| 300m |
4°
|
4°
|
4°
|
10°
|
15°
|
16°
|
15°
|
11°
|
| Valley |
4°
|
4°
|
4°
|
10°
|
15°
|
17°
|
16°
|
12°
|
Additional weather information
Meteorologist's view
Warm weather is forecast for both Tuesday and Wednesday. Anyone heading into the mountains should carry ample water and wear suitable clothing, including a cap and sunglasses, to protect against the sun.
Weather
Dry and sunny, though a bit chilly at first. Cloud gradually increasing during the day, though much of it medium or high level cloud, so sunshine just turning hazy. Breezy in the morning, and fairly windy near the hill tops, though southeasterly winds gradually easing later. Becoming very warm in the sunshine.
Chance of cloud-free hill tops
100%
Low cloud and visibility
Low cloud not expected, with visibility mostly very good.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 5mm | 6.2mm | 13.6mm |
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
Another fine and settled day with lighter winds. Feeling very warm again by the afternoon. Some isolated spots of mist and fog possible in the valleys to start. This lifting quickly through the morning. Lots of sunshine then a chance it could turn cloudier during the afternoon, mostly towards western regions of the park. This should be mostly high cloud, though cloud bases will gradually lower through the evening and may produce some light rain and drizzle.
Chance of cloud-free hill tops
>90% but lowering to 40% from late evening.
Maximum wind speed expected
15-20 mph.
Temperature
- At 600m Plus 9 Celsius rising to plus 15 Celsius.
- Valley Plus 4 Celsius rising to plus 18 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Clear skies then a build of higher cloud in the afternoon from the west. Very good visibility.
Mountain weather information
Thu 9 Apr
Sunrise:
Sunset:
Early rain clearing to a colder, brighter but rather windy day with sunshine and showers. Strong westerly winds, particularly in heavy showers. Freezing levels lowering to around 700 metres, with some of the showers turning wintry near the hill tops.
Fri 10 Apr
Sunrise:
Sunset:
A dry start then likely turning wet and windy through the morning. Strong to very strong southerly winds. Freezing levels climbing back above the hill tops.
Sat 11 Apr
Sunrise:
Sunset:
Some rain to start then turning brighter into the afternoon with a risk of showers. Moderate to strong southwesterly winds.
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.