
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High overall confidence for the overnight conditions, however, some uncertainties for the extend of showers for Thursday and Friday. Low confidence for timing and extent of showers over the weekend.
This evening forecast
Low cloud moving in from the west, bringing prolonged spells of rain and drizzle later, with a risk of hill fog and poor visibility overnight. Southwesterly light to moderate winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Heavy Persistent Rain
Strong Sunlight
Mountain weather forecast
Wet morning, but improving through 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) |
80% | 80% | 80% | 80% | 30% | 20% | <05% | <05% |
Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|---|---|
600m |
S
9
|
S
12
|
SW
13
|
SW
14
|
SW
12
|
SW
11
|
SW
11
|
SW
10
|
300m |
S
3
|
SW
6
|
SW
7
|
SW
10
|
SW
9
|
SW
8
|
SW
7
|
SW
5
|
Valley |
S
2
|
SW
3
|
SW
6
|
SW
9
|
SW
8
|
SW
6
|
SW
6
|
SW
4
|
Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|---|---|
600m | 13 | 17 | 16 | 18 | 17 | 15 | 15 | 14 |
300m | 8 | 14 | 14 | 18 | 16 | 14 | 14 | 11 |
Valley | 6 | 12 | 13 | 18 | 16 | 13 | 13 | 10 |
Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|---|---|
600m |
15°
|
14°
|
15°
|
16°
|
16°
|
17°
|
16°
|
14°
|
300m |
15°
|
16°
|
16°
|
18°
|
20°
|
20°
|
19°
|
16°
|
Valley |
16°
|
16°
|
17°
|
18°
|
20°
|
21°
|
19°
|
16°
|
Freezing Level |
3,700m
|
3,500m
|
3,100m
|
2,900m
|
3,100m
|
2,800m
|
2,400m
|
2,800m
|
Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
---|---|---|---|---|---|---|---|---|
600m |
13°
|
12°
|
13°
|
14°
|
15°
|
16°
|
14°
|
13°
|
300m |
16°
|
15°
|
16°
|
17°
|
19°
|
20°
|
18°
|
16°
|
Valley |
16°
|
16°
|
17°
|
18°
|
20°
|
21°
|
19°
|
16°
|
Additional weather information
Meteorologist's view
Feeling humid from Thursday with a mild and muggy start. Waterproof layers may be needed in prolonged rain and drizzle as a frontal system continues to clear to the east of the region. Some brighter and sunny spells through the afternoon, though slopes may remain slippery.
Weather
A mild and muggy start as low cloud, rain, and drizzle continue spreading east through the morning, with heaviest outbreaks on western upslopes. Cloud breaking up through the afternoon bringing brighter and drier conditions, though scattered showers may be possible during the afternoon.
Chance of cloud-free hill tops
Less than 20%, improving to 70% in the afternoon and evening as rain clears.
Low cloud and visibility
Extensive low cloud in the morning with bases 400-600m, occasionally reducing to 200m in heavy outbursts but improving through the afternoon as cloud bases lift and break up, leaving patchy cloud above 800m with good air clarity allowing far reaching views.
Recent rainfall
Last 24 hours | Last 48 hours | Last 72 hours |
---|---|---|
2.6mm | 15.6mm | 16.2mm |
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
A band of low cloud and rain moves across the region through the morning, clearing to the east by midday, with infrequent showers following behind.
Chance of cloud-free hill tops
30% in the morning, becoming 80% in the afternoon.
Maximum wind speed expected
Southwesterly 10-25mph with gusts 20-25mph.
Temperature
- At 600m Plus 12 Celsius rising to Plus 16 Celsius.
- Valley Plus 15 Celsius rising to Plus 20 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Generally good visibility, but temporarily deteriorating in rain as cloud bases lower to 300-500m at times. Improving to very good through the afternoon. Good air clarity outside of rain allowing for clear views.
Mountain weather information
Sat 19 Jul
Unsettled conditions as showers move in from the south, these may be heavy at times particularly over higher ground, with a risk of thunder and hail. Light and variable winds at first, becoming south to southwestherly light to moderate through the afternoon.
Sun 20 Jul
Unsettled conditions continue with a further risk of widespread showers, expected to be heavy at times with a risk of thunder and hail. South to southeasterly moderate winds.
Mon 21 Jul
Bright and drier conditions, though a risk of showers in the afternoon. Southwest to westerly light winds initially, increasing to moderate through the afternoon.
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.