Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High rather unsettled through the coming days and a largely fine day on Thursday, but low for developments Friday and Saturday due to uncertainties over the track of a deep low, currently expected to move northeast across Northwest Scotland through Friday.
This evening forecast
Dry with clear spells. Northwesterly winds easing.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
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
Cloudy morning with patchy rain and drizzle. Brighter afternoon
| 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% | 10% | 30% | 20% | 10% | 10% | <05% | 10% |
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 |
W
12
|
W
12
|
W
12
|
NW
13
|
NW
12
|
W
14
|
W
10
|
W
8
|
| 300m |
W
6
|
W
6
|
W
6
|
W
8
|
W
9
|
W
10
|
W
6
|
SW
5
|
| Valley |
W
5
|
W
6
|
W
6
|
W
8
|
W
8
|
W
10
|
W
6
|
W
5
|
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 | 18 | 17 | 17 | 17 | 18 | 19 | 15 | 13 |
| 300m | 14 | 14 | 14 | 15 | 17 | 19 | 13 | 11 |
| Valley | 14 | 15 | 14 | 15 | 17 | 19 | 14 | 11 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
4°
|
5°
|
6°
|
7°
|
8°
|
9°
|
8°
|
6°
|
| 300m |
6°
|
7°
|
8°
|
9°
|
11°
|
12°
|
10°
|
7°
|
| Valley |
7°
|
7°
|
8°
|
10°
|
12°
|
13°
|
11°
|
8°
|
| Freezing Level |
2,000m
|
1,900m
|
1,800m
|
1,800m
|
1,700m
|
1,600m
|
1,600m
|
1,400m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
0°
|
1°
|
3°
|
4°
|
5°
|
6°
|
5°
|
3°
|
| 300m |
4°
|
5°
|
6°
|
7°
|
9°
|
10°
|
9°
|
6°
|
| Valley |
5°
|
6°
|
6°
|
8°
|
11°
|
11°
|
10°
|
7°
|
Additional weather information
Meteorologist's view
Temperatures in valleys rising to plus 14 or 15 Celsius.
Weather
A few clear spells in the east but generally rather cloudy through the early hours with, especially across western parts, patchy rain and drizzle. Then a mostly cloudy start with patchy rain and drizzle, mainly across western hills, with some brighter spells in the east, which develop more widely for the afternoon with most places becoming dry.
Chance of cloud-free hill tops
Little chance at first in west and around 40% in east becoming nearer 90% in the afternoon.
Low cloud and visibility
Periods or persistent cloud, but more occasional at times in east, above about 450-600m, with patches below, becoming occasional above about 750-900m during the afternoon, cloud increasing again later in the evening. Away from cloud visibility good falling to several kilometres at times in rain and drizzle.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 6.2mm | 8.2mm | 8.6mm |
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
Rather cloudy overnight with patchy rain and drizzle, a few clearer spells possible in the east. The cloud breaking through the morning to leave the rest of the day bright with sunny spells, the best of these in the east. Cloud increasing through the evening with patchy rain spreading southeast.
Chance of cloud-free hill tops
Around 25% at first, otherwise around 90%, falling close to zero in evening.
Maximum wind speed expected
Southwesterly 10mph or less increasing 15-20mph for the afternoon, veering more northwesterly towards midnight.
Temperature
- At 600m Around plus 5 Celsius rising to plus 8 or 9 Celsius
- Valley Plus 5 or 6 Celsius at dawn rising to plus 12 or 13 Celsius by day
- Freezing level Above the summits.
Low cloud and visibility
Periods cloud above about 450-600m at first becoming more occasional above about 750-900m, until evening then cloud becoming periods or persistent above 450-600m. Away from cloud visibility good or very good falling to several kilometres in rain and drizzle.
Mountain weather information
Thu 2 Apr
Sunrise:
Sunset:
Dry with some long clear or good sunny spells. Mainly light winds then freshening southwesterly in evening. Freezing level falling to around 750m, rising above summits later.
Fri 3 Apr
Sunrise:
Sunset:
Cloudy with occasionally heavy rain, clearing to sunny spells and showers in afternoon. Strong to gale force southwesterly winds, veering westerly and easing later. Freezing level above summits.
Sat 4 Apr
Sunrise:
Sunset:
Cloudy with outbreaks of occasionally heavy rain, becoming lighter and patchier in afternoon. Strengthening southwesterly winds. Freezing level above the 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.