Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence for remaining generally unsettled, and turning colder for a time, but lower for details of any brighter or clearer spells
This evening forecast
Cloudy with outbreaks of occasionally heavy rain and, above about 750m, snow dying out through the evening with a few clear spells developing. Cold with mainly light winds.
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.
Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Mountain weather forecast
Rather cloudy with, especially in east, occasional rain. Strengthening winds
| 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) |
10% | 10% | 30% | 30% | 30% | 30% | 20% | 40% |
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 |
N
7
|
NE
8
|
E
12
|
E
15
|
E
18
|
E
20
|
E
22
|
E
23
|
| 300m |
W
3
|
NE
3
|
E
6
|
E
8
|
E
12
|
E
13
|
E
13
|
E
15
|
| Valley |
NW
3
|
NE
3
|
E
5
|
E
8
|
E
11
|
E
12
|
E
13
|
E
14
|
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 | 9 | 11 | 18 | 22 | 27 | 30 | 32 | 34 |
| 300m | 6 | 8 | 14 | 17 | 23 | 26 | 27 | 29 |
| Valley | 7 | 7 | 13 | 17 | 23 | 26 | 28 | 30 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
1°
|
2°
|
2°
|
2°
|
3°
|
3°
|
2°
|
2°
|
| 300m |
3°
|
3°
|
3°
|
4°
|
5°
|
6°
|
5°
|
4°
|
| Valley |
4°
|
4°
|
4°
|
4°
|
6°
|
6°
|
6°
|
5°
|
| Freezing Level |
900m
|
1,000m
|
900m
|
900m
|
1,000m
|
1,000m
|
1,000m
|
900m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-2°
|
-2°
|
-3°
|
-3°
|
-3°
|
-3°
|
-4°
|
-4°
|
| 300m |
2°
|
2°
|
1°
|
1°
|
1°
|
2°
|
1°
|
0°
|
| Valley |
2°
|
2°
|
2°
|
2°
|
2°
|
3°
|
2°
|
1°
|
Additional weather information
Meteorologist's view
Temperatures close to Zero Celsius for a time through early hours giving frozen surfaces. Significant chill effect increasing as winds increase, gusts around 40mph over ridges and summits in afternoon and evening.
Weather
Clear spells at first with, especially in west, frozen surfaces to low levels through the early hours, but cloud increasing towards dawn with patchy rain or drizzle, falling as sleet or snow on highest summits. Then a mostly cloudy day with, especially in east, occasional light rain and drizzle, with some wintriness on highest summits. Cloudy through the evening with further light rain and drizzle, this turning increasingly to snow above about 750m, becoming more persistent towards midnight.
Chance of cloud-free hill tops
Little chance through the morning gradually increasing to 40% through the afternoon
Low cloud and visibility
Periods or persistent cloud above 450-600m, with patches below, lifting, and becoming more occasional at times, in the afternoon above 600-750m. Away from cloud visibility good, falling to several kilometres in rain and drizzle, and perhaps a kilometre in snow.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 7.4mm | 27.2mm | 38.8mm |
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
Cloudy with outbreaks of occasionally heavy rain through the early hours, with some snow on higher summits. The more persistent rain clear around dawn to leave another largely cloudy day, perhaps some brighter spells in west, with occasional rain and drizzle, with perhaps some snow down to 600m or so for a time.
Chance of cloud-free hill tops
Little chance through the morning, rising to 25% in west in afternoon.
Maximum wind speed expected
Easterly 20-25mph, with gusts around 40mph over ridges and summits, becoming more southerly and easing through the afternoon.
Temperature
- At 600m Around plus 1 Celsius rising to plus 3 Celsius
- Valley Around at dawn plus 3 or 4 Celsius by dawn and 6 Celsius by day
- Freezing level Around 900m falling to 750m for a time, rising above summits in evening
Low cloud and visibility
Periods or persistent cloud above 450-600m, with patches below, but in the west cloud more occasional above 600m at times in the afternoon. Away from cloud visibility good, falling to several kilometres in rain, drizzle and sleet, and perhaps a kilometre in snow.
Mountain weather information
Wed 4 Feb
Sunrise:
Sunset:
Cloudy start with a little rain and drizzle but becoming brighter through the morning to leave a largely dry afternoon with sunny spells. Occasionally fresh southeasterly breeze. Freezing level above summits.
Thu 5 Feb
Sunrise:
Sunset:
Largely dry and bright with sunny spells but cloud increasing from the southwest through the afternoon and evening. Strengthening easterly winds. Freezing level falling to 600m.
Fri 6 Feb
Sunrise:
Sunset:
Cloudy with occasionally heavy rain, preceded briefly by snow above about 450m, clearing to showers later. Strong easterly winds turning southerly and easing. Freezing level 450-600m rising 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.