Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Generally high for the next few days, a couple of hours uncertainty on timing of rain on Wednesday. Low over the weekend, especially on Saturday.
This evening forecast
A cold, dry evening and start to the night. Temperatures falling away quickly under clear skies and light winds. Freezing level 800m.
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.
Mountain weather forecast
Dry bright start. Turning milder as rain and low cloud spread east.
| 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) |
00% | 00% | 00% | 10% | 60% | 80% | 80% | 60% |
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
4
|
W
5
|
S
8
|
S
13
|
S
18
|
S
20
|
S
18
|
SW
15
|
| 300m |
SW
1
|
SW
4
|
S
5
|
S
9
|
S
11
|
S
14
|
SW
12
|
SW
10
|
| Valley |
NW
2
|
S
2
|
S
2
|
S
5
|
S
8
|
S
11
|
SW
10
|
SW
9
|
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 | 5 | 7 | 11 | 18 | 24 | 27 | 25 | 21 |
| 300m | 2 | 6 | 9 | 17 | 21 | 27 | 24 | 20 |
| Valley | 3 | 4 | 7 | 14 | 18 | 24 | 23 | 20 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 600m |
1°
|
1°
|
1°
|
2°
|
3°
|
4°
|
6°
|
7°
|
| 300m |
-1°
|
0°
|
2°
|
4°
|
6°
|
6°
|
7°
|
9°
|
| Valley |
0°
|
0°
|
0°
|
3°
|
6°
|
7°
|
8°
|
9°
|
| Freezing Level |
700m
|
700m
|
800m
|
1,000m
|
1,600m
|
2,000m
|
2,300m
|
2,400m
|
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°
|
-3°
|
-3°
|
-2°
|
-2°
|
1°
|
3°
|
| 300m |
-2°
|
-2°
|
-1°
|
0°
|
2°
|
2°
|
4°
|
6°
|
| Valley |
-2°
|
-2°
|
-2°
|
1°
|
4°
|
4°
|
5°
|
7°
|
Additional weather information
Meteorologist's view
A couple of hours uncertainty in timing of rain, but good confidence for a general deterioration in conditions after a dry bright start.
Weather
Cold and dry with clear spells and a frost in the valleys in the early hours. Some sunny spells to start, but cloud soon thickening. Outbreaks of rain from around midday, occasionally heavy in the afternoon before turning lighter and patchy in the evening.
Chance of cloud-free hill tops
80% in the morning, 10% in the afternoon.
Low cloud and visibility
Very good visibility in the morning with cloud expected to be above the summits. Visibility falling poor in the afternoon as persistent cloud lowers to around 400m, occasionally lower levels on southern slopes.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 8.4mm | 13.8mm |
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
Low cloud and patchy drizzle through the early hours and into the morning. This gradually turns to more persistent rain through the day with some heavier outbreaks likely at the end of the day. Rain finally clearing in the evening with some clear spells overnight.
Chance of cloud-free hill tops
Nil during the day. 60% in the evening
Maximum wind speed expected
Southwest 20-25 mph increasing to 35 gusting 40 mph.
Temperature
- At 600m Plus 9 Celsius
- Valley Plus 8 Celsius rising to 11 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Very poor throughout the day in low cloud, rain and drizzle with cloud bases around 400m. Visibility improving in the evening as cloud lifts to around 600m with occasional breaks.
Mountain weather information
Fri 28 Nov
Sunrise:
Sunset:
A dry bright start, but a band of heavy showery rain moves east during the day with strong southwest winds. Clear spells and the odd shower later. Freezing level above the summits, perhaps dropping to 800m in the evening.
Sat 29 Nov
Sunrise:
Sunset:
Large uncertainty with the potential for strong winds and a spell of possibly heavy rain and summit snow, but also a chance that this could pass further south leaving a dry day with lighter winds.
Sun 30 Nov
Sunrise:
Sunset:
Good chance for a brief settled spell with light winds and sunny spells before winds and cloud increase as another low pressure system approaches the west of the UK with rain likely later.
Updated at:
Summit specific forecast
Mountain summit forecast map
Loading map…
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.