Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence for southeasterly conditions for the rest of the weekend, then turning colder towards Christmas with easterly winds drawing in cold air. Mostly dry apart from drizzle at times in the east. Lower confidence in cloud details for any particular day.
This evening forecast
Cloudy with rain spreading in from the west during the evening, strong southeasterly winds continuing, rain becoming heavy and persistent later in the night.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
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
Bright or sunny spells in the morning, cloudier during the afternoon with some light rain later.
| 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) |
40% | 30% | 20% | 20% | 10% | 20% | 20% | 70% |
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 |
S
21
|
S
15
|
SE
12
|
E
15
|
E
15
|
E
17
|
E
17
|
E
16
|
| 300m |
SE
10
|
SE
4
|
SE
5
|
E
6
|
E
7
|
E
9
|
E
8
|
E
7
|
| Valley |
SE
6
|
E
4
|
SE
4
|
E
4
|
E
6
|
E
7
|
E
6
|
E
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 | 27 | 20 | 16 | 20 | 21 | 23 | 23 | 23 |
| 300m | 24 | 12 | 10 | 12 | 16 | 18 | 19 | 16 |
| Valley | 19 | 8 | 9 | 11 | 14 | 17 | 17 | 14 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
5°
|
4°
|
4°
|
4°
|
5°
|
5°
|
5°
|
5°
|
| 300m |
6°
|
6°
|
4°
|
5°
|
6°
|
7°
|
7°
|
7°
|
| Valley |
7°
|
6°
|
5°
|
5°
|
7°
|
8°
|
7°
|
7°
|
| Freezing Level |
1,300m
|
1,200m
|
1,100m
|
1,200m
|
1,300m
|
1,400m
|
1,400m
|
1,600m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
-1°
|
0°
|
0°
|
0°
|
0°
|
1°
|
1°
|
1°
|
| 300m |
3°
|
4°
|
2°
|
2°
|
4°
|
4°
|
4°
|
4°
|
| Valley |
5°
|
5°
|
3°
|
3°
|
5°
|
6°
|
5°
|
6°
|
Additional weather information
Meteorologist's view
Quite a breezy day and feeling cold in fresh easterly winds, freezing level above all summits.
Weather
Mostly dry and bright in the morning, perhaps cloudier further east with risk of some drizzle here. Clouding over in the afternoon with spells of rain in the evening turning heavy later. The best conditions are likely to be in the west of the area in the morning.
Chance of cloud-free hill tops
80% in the west, 60% in the east, falling to 40% in the afternoon
Low cloud and visibility
Layers of scattered or cloud above 500m are likely around eastern hills with cloud bases increasing and amounts decreasing further west, the cloud is associated with light rain and drizzle. Visibility will be moderate or poor at times in drizzle on eastern hills but will be mainly good or very good in the west of the area. Cloud thickening and lowering in the late afternoon with visibility deteriorating towards late afternoon.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 2.6mm | 6.2mm | 41.4mm |
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
Overnight rain clearing during the morning but remaining cloudy during the day, a few clearer spells further west. Perhaps some drizzly patches in the east.
Chance of cloud-free hill tops
50%, more low cloud around eastern hills.
Maximum wind speed expected
Southeasterly 15 mph.
Temperature
- At 600m Plus 5 Celsius.
- Valley Plus 8 Celsius.
- Freezing level Above all summits
Low cloud and visibility
Scattered or broken layers of cloud above 300m for much of the day. Visibility moderate or poor at first but becoming good for most areas.
Mountain weather information
Tue 23 Dec
Sunrise:
Sunset:
Turning colder in freshening easterly winds. Quite a cloudy day especially for eastern mountains, with some persistent hill fog here, perhaps some brighter spells in the west. Some outbreaks of drizzle possible in the east too.
Wed 24 Dec
Sunrise:
Sunset:
A bitterly cold day with fresh or strong easterly winds, some winter sunshine likely but doing little for the cold feel, mainly good visibility with cloud above the hill tops.
Thu 25 Dec
Sunrise:
Sunset:
Likely to be bitterly cold and a cloudy Christmas day, with strong easterly or northeasterly 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.