Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence for mostly benign conditions on Tuesday, although lower for the amount of high level cloud. High confidence for increasingly warm temperatures on Tuesday and Wednesday. Confidence falls for timing and extend of any rainfall from 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 settled with hazy sunny spells. Breezy on summits.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
<05% | 00% | 00% | 00% | 00% | <05% |
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
25
|
SE
25
|
SE
23
|
SE
23
|
SE
18
|
SE
17
|
| 300m |
E
4
|
E
9
|
SE
10
|
SE
14
|
SE
6
|
SE
7
|
| Valley |
NE
3
|
E
9
|
E
10
|
SE
12
|
E
6
|
E
5
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 38 | 34 | 30 | 30 | 26 | 25 |
| 300m | 12 | 14 | 23 | 28 | 18 | 20 |
| Valley | 15 | 20 | 21 | 26 | 12 | 9 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
9°
|
11°
|
14°
|
16°
|
14°
|
12°
|
| 300m |
5°
|
11°
|
18°
|
19°
|
16°
|
12°
|
| Valley |
5°
|
12°
|
18°
|
20°
|
17°
|
13°
|
| Freezing Level |
2,300m
|
2,700m
|
2,600m
|
2,500m
|
2,500m
|
2,500m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
5°
|
7°
|
10°
|
11°
|
11°
|
8°
|
| 300m |
3°
|
9°
|
15°
|
16°
|
15°
|
11°
|
| Valley |
4°
|
10°
|
16°
|
17°
|
16°
|
12°
|
Additional weather information
Meteorologist's view
Conditions will be good across the hills for any outdoor activities. Despite some higher cloud being possible at times, warm sunshine will lead to Moderate UV levels. Don't forget appropriate sun protection, along with ample water.
Weather
Dry and sunny, though chilly at first. Cloud gradually increasing during the day, though much of it medium or high level cloud, so sunshine just turning hazy. Rather windy, especially near the summits, though gradually easing later. Becoming very warm in the sunshine.
Chance of cloud-free hill tops
Greater than 95%.
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 |
|---|---|---|
| 0.2mm | 1mm | 6.4mm |
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 warm again by the afternoon. Some isolated spots of mist and fog possible in the valleys to start but quickly clearing through the morning. A largely fine day follows with a mixture of warm sunny spells, but also further high or medium cloud. This thickening further later in the day, with low cloud moving into western hills after dark. This could bring the odd spot of light rain and drizzle.
Chance of cloud-free hill tops
90% but lowering to 60% from late evening
Maximum wind speed expected
Southwesterly 10-20 mph.
Temperature
- At 600m Plus 9 Celsius rising to plus 17 Celsius.
- Valley Plus 5 Celsius rising to plus 22 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Any cloud remaining largely above summits, although any early morning mist or fog patches could give some brief low cloud as it clears. Areas of low cloud also perhaps descending and spreading east after dark, potentially obscuring a few hills and routes as low as 300m, mainly in the west. Aside from this, visibility will remain good for much of the day, with some wide-ranging views from any of the summits.
Mountain weather information
Thu 9 Apr
Sunrise:
Sunset:
Early rain clears southeast, to give some brighter skies and scattered showers. Feeling cooler and fresher, with a brisk westerly wind. Freezing level above summits, but falling to 800m after dark.
Fri 10 Apr
Sunrise:
Sunset:
Bright but chilly start. Cloud increasing from the west to bring some outbreaks of rain later in the day. Brisk winds. Freezing level quickly rising from 800m to be above summits by mid-morning
Sat 11 Apr
Sunrise:
Sunset:
Cloud and rain gradually clear eastwards during the morning, although timing is still uncertain. Becoming brighter with some scattered showers following. Breezy. Freezing level falling to around 700m.
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.