Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High confidence in the overall story but moderate for the timing and intensity of the rain on Thursday, low for the shower details at the end of the week.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Harmful UV levels from sunlight increase with altitude giving a greater risk of sunburn and eye damage, even on some overcast days. On breezy days, the cooling effect of wind on exposed skin may disguise any feeling of sunburn until it is too late. If there is snow cover, glare increases the effect of UV rays especially on the eyes. It is advisable to wear sun block, protective clothing such as a long-sleeved top and hat and have good quality eye protection.
Mountain weather forecast
A fine day with variable amounts of cloud and sunny spells, especially later.
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
10% | 10% | 10% | <05% | <05% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
NW
6
|
NW
8
|
NW
8
|
W
10
|
W
10
|
W
7
|
| 300m |
W
3
|
NW
5
|
NW
6
|
W
8
|
W
8
|
W
5
|
| Valley |
W
2
|
NW
5
|
NW
5
|
W
7
|
W
8
|
W
5
|
Wind gust (mph)
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m | 9 | 11 | 11 | 14 | 14 | 11 |
| 300m | 6 | 9 | 11 | 14 | 14 | 10 |
| Valley | 6 | 9 | 10 | 13 | 16 | 10 |
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
5°
|
8°
|
9°
|
10°
|
9°
|
7°
|
| 300m |
7°
|
11°
|
12°
|
14°
|
12°
|
8°
|
| Valley |
8°
|
11°
|
13°
|
14°
|
13°
|
8°
|
| Freezing Level |
1,200m
|
1,300m
|
1,500m
|
1,600m
|
1,600m
|
1,500m
|
Altitude above mean sea level
| 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
|---|---|---|---|---|---|---|
| 600m |
3°
|
5°
|
7°
|
8°
|
7°
|
5°
|
| 300m |
6°
|
10°
|
11°
|
12°
|
10°
|
7°
|
| Valley |
7°
|
10°
|
12°
|
13°
|
11°
|
7°
|
Additional weather information
Meteorologist's view
Despite a rather cool feel still, especially during the cloudy periods, in any sunshine UV levels will be high so it's advised to wear sun protection.
Weather
After a chilly start with some sunshine, probably clouding over by mid-morning albeit still with sunny intervals. Remaining largely dry for the remainder of the day with broken cloud and sunny spells, these becoming increasingly prolonged later in the afternoon and during the evening. Feeling a bit warmer compared to recent days with lighter winds.
Chance of cloud-free hill tops
>95%.
Low cloud and visibility
Cloud generally above summits. Very good visibility otherwise, with superb air clarity providing excellent views of distant peaks and landmarks.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0.4mm | 1.4mm | 3.6mm |
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
Staying dry through the early hours with clear skies at first, though perhaps somewhat cloudier later. A bright start to the morning with some hazy sunshine first thing, but cloud quickly thickening through the morning and outbreaks of rain and drizzle likely arriving around noon. Increasingly wet and windy during the afternoon with the heaviest and most persistent rain and drizzle in the south. Gales are possible over the highest summits. Perhaps turning drier by midnight.
Chance of cloud-free hill tops
80% falling to 40%.
Maximum wind speed expected
Southerly 30-35 mph gusting 45-50 mph.
Temperature
- At 600m Plus 9 Celsius.
- Valley Plus 5 Celsius rising to plus 14 Celsius.
- Freezing level Well above the summits.
Low cloud and visibility
Periods of cloud developing above 600-700m by lunchtime. This becoming more extensive through the afternoon with periods of cloud above 450-500m on south facing slopes and more widely by the evening. Good visibility at first but becoming occasionally moderate through the afternoon and poor in the drizzle. Becoming generally poor or very poor on the higher slopes in the cloud with misty or foggy conditions developing.
Mountain weather information
Fri 14 Jun
Sunrise:
Sunset:
Less windy and brighter with a mixture of sunny intervals and scattered showers, these heavy at times with a risk of thunder. Moderate south-westerly winds.
Sat 15 Jun
Sunrise:
Sunset:
Staying unsettled with showers and perhaps longer periods of rain at times, occasionally heavy. Moderate south-westerly winds. A bit warmer.
Sun 16 Jun
Sunrise:
Sunset:
Staying similar with a mixture of sunshine and showers, but perhaps fewer showers and longer bright spells compared to on Saturday. Moderate south-westerly 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.