Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Cool conditions continuing on Thursday, turning milder later on Friday with rain and strong winds expected at times over the weekend. Moderate confidence in cloud and precipitation detail on Thursday and Friday.
This evening forecast
A cloudy evening with outbreaks of snow above 200m, sleet and rain at lower levels, snow accumulations expected on the hills, strong southeasterly winds through the evening.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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.
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
Some mist and fog at first, otherwise a cloudy morning but sunny spells developing in the 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) |
20% | 20% | 20% | 10% | 10% | 10% | 30% | 50% |
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 |
NE
15
|
NE
12
|
N
12
|
N
12
|
NW
12
|
NW
13
|
NW
12
|
W
15
|
| 300m |
NE
9
|
NE
5
|
N
4
|
N
5
|
NW
7
|
NW
8
|
W
6
|
W
8
|
| Valley |
NE
7
|
N
4
|
N
4
|
NW
4
|
NW
7
|
NW
8
|
W
6
|
W
7
|
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 | 24 | 18 | 16 | 15 | 17 | 19 | 17 | 21 |
| 300m | 19 | 12 | 12 | 10 | 13 | 16 | 14 | 17 |
| Valley | 17 | 11 | 11 | 9 | 14 | 18 | 14 | 17 |
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°
|
-2°
|
-1°
|
0°
|
2°
|
1°
|
2°
|
| 300m |
0°
|
0°
|
0°
|
1°
|
3°
|
5°
|
3°
|
4°
|
| Valley |
1°
|
1°
|
1°
|
2°
|
5°
|
6°
|
4°
|
5°
|
| Freezing Level |
300m
|
300m
|
300m
|
300m
|
600m
|
800m
|
900m
|
900m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-8°
|
-7°
|
-7°
|
-6°
|
-4°
|
-3°
|
-3°
|
-3°
|
| 300m |
-4°
|
-2°
|
-2°
|
-2°
|
1°
|
2°
|
1°
|
1°
|
| Valley |
-2°
|
-1°
|
-1°
|
0°
|
2°
|
3°
|
2°
|
2°
|
Additional weather information
Meteorologist's view
Strong winds early in the morning will ease with winds veering to the southwest later in the day. Note the gradual lift in freezing level during the day as milder air moves in from the west.
Weather
A largely cloudy day but mostly dry, with early mist and fog a risk, becoming a bit brighter in the afternoon with a few sunny spells possible, likely to cloud over again into the evening with some light rain or drizzle later.
Chance of cloud-free hill tops
30% improving to 70% in the afternoon deteriorating to 30% in the evening.
Low cloud and visibility
Layers of broken or overcast cloud above 400m are expected in the morning, cloud tending to lift and break during the morning becoming scattered above 600m in the afternoon. Visibility will be moderate at times in the morning but improving good later in the day. Conditions likely to deteriorate later in the evening with cloud thickening and lowering again.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 2.6mm | 3.4mm | 5mm |
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
A cloudy and wet start, falling as rain at all levels, perhaps sleet at first on the highest summits. A drier afternoon with a few bright spells developing. However and increasing chance of a few heavy showers later in the afternoon, these may be heavy for a time but moving through quite quickly, perhaps some gusty winds near showers.
Chance of cloud-free hill tops
40% improving to 70% in the afternoon.
Maximum wind speed expected
Southwesterly 25 mph gusts 35mph.
Temperature
- At 600m Plus 2 rising to 6 Celsius.
- Valley Plus 3 rising to 10 Celsius.
- Freezing level 1000m rising above all summits.
Low cloud and visibility
Layers of broken cloud can be expected above 400m during the morning, becoming scattered above 600m in the afternoon, best chance of less cloud around northern fells. Visibility will be moderate or poor in the morning but becoming good in the afternoon, perhaps dipping moderate in showers at times.
Mountain weather information
Sat 21 Feb
Sunrise:
Sunset:
A cloudy and wet start, some heavier spells of rain at times, risk of further rain later in the day, low confidence in timings, feeling milder despite strong westerly winds, risk of summit gales.
Sun 22 Feb
Sunrise:
Sunset:
Further rain and clustery winds expected, perhaps some drier spells at times, feeling mild.
Mon 23 Feb
Sunrise:
Sunset:
Continuing with westerly winds with the chance of showers or longer spells of rain, remaining mild.
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.