Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
Usual uncertainties in distribution and organisation of showers. Small uncertainties around timing of rain on Tuesday. Moderate confidence for timing of rain on Wednesday.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Strong Sunlight
Thunderstorms
Heavy Persistent Rain
Mountain weather forecast
A chilly but bright start. Sunshine and scattered showers during the afternoon.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | 20% | 30% | 20% | 10% | 10% |
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
S
7
|
S
8
|
SW
10
|
SW
12
|
SW
10
|
S
9
|
| 300m |
S
4
|
S
5
|
S
7
|
SW
9
|
SW
6
|
S
3
|
| Valley |
W
2
|
S
4
|
S
7
|
SW
8
|
SW
5
|
E
2
|
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 9 | 11 | 14 | 16 | 14 | 12 |
| 300m | 6 | 10 | 13 | 16 | 13 | 9 |
| Valley | 6 | 8 | 12 | 15 | 12 | 7 |
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
3°
|
4°
|
5°
|
6°
|
5°
|
3°
|
| 300m |
2°
|
8°
|
8°
|
10°
|
8°
|
4°
|
| Valley |
2°
|
9°
|
8°
|
10°
|
9°
|
4°
|
| Freezing Level |
800m
|
900m
|
1,000m
|
900m
|
1,000m
|
1,000m
|
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
0°
|
1°
|
1°
|
2°
|
2°
|
0°
|
| 300m |
1°
|
6°
|
6°
|
7°
|
6°
|
3°
|
| Valley |
1°
|
8°
|
6°
|
8°
|
7°
|
3°
|
Additional weather information
Meteorologist's view
Sunny spells and showers early in the day, so light layers and waterproofs advised.
Weather
A chilly and bright start, with a touch of grass frost likely. Chance of some shallow mist and fog patches in prone valleys, although these will soon dissipate after dawn. Otherwise, it will be a day of sunny spells and scattered showers, these could be locally heavy, with the risk of hail. Any showers gradually easing through the afternoon, with some decent spells of sunshine developing. Staying dry with clear spells into the evening. Temperatures similar to Sunday but feeling more pleasant in lighter winds.
Chance of cloud-free hill tops
60% early on, otherwise 90%.
Low cloud and visibility
Patchy low cloud possible early on, otherwise cloud above summits. Cloud bases may drop briefly in any heavier downpours. Poor visibility to start in mist and fog, then becoming good or very good visibility outside of showers.
Recent rainfall
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 16.2mm | 32.2mm | 32.2mm |
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
An unsettled day ahead. Turning wet, and windy across summits. Often cloudy with patchy light rain and drizzle during the morning which is likely to turn heavy and persistent in the afternoon. Cloud bases dropping low enough to bring some hill fog.
Chance of cloud-free hill tops
10% chance.
Maximum wind speed expected
Southerly at 25-30 mph, gusting 30-35mph.
Temperature
- At 600m Plus 2 Celsius rising to plus 7 Celsius.
- Valley Zero Celsius rising to plus 12 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Cloud bases around 400-500m but likely lower in heavy downpours bringing hill fog and poor visibility.
Mountain weather information
Wed 15 Apr
Wet and windy with heavy outbreaks of rain creating very poor visibility across the park at times alongside low cloud bases. Turning drier later. Moderate to strong southerly winds. Freezing level above summits.
Thu 16 Apr
Sunshine and showers. Feeling warm in the sunshine. Light to moderate southwesterly winds. Freezing level above summits.
Fri 17 Apr
Mostly dry and bright with a risk of rain later. Light to moderate southerly winds.
Summit specific forecast
Mountain summit forecast map
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.