Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High for dry and fine through Saturday and much of Sunday, then a change to more unsettled conditions thereafter, but lower for amount of cloud above the summits next couple of days and timing of arrival of rain later Sunday.
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
Fine and dry with bright or sunny intervals.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
00% | 00% | 00% | 00% | 00% | 00% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
NE
5
|
E
7
|
NE
4
|
NE
5
|
E
5
|
SW
3
|
| 300m |
SW
1
|
E
3
|
NE
4
|
E
4
|
E
3
|
SW
3
|
| Valley |
W
3
|
E
2
|
E
4
|
E
4
|
SE
3
|
W
3
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 7 | 9 | 5 | 7 | 6 | 5 |
| 300m | 4 | 7 | 6 | 6 | 6 | 6 |
| Valley | 4 | 5 | 6 | 6 | 7 | 6 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
7°
|
9°
|
10°
|
9°
|
7°
|
| 300m |
2°
|
7°
|
12°
|
13°
|
10°
|
6°
|
| Valley |
2°
|
7°
|
13°
|
14°
|
10°
|
6°
|
| Freezing Level |
1,200m
|
1,100m
|
1,200m
|
1,400m
|
1,500m
|
1,700m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
4°
|
5°
|
8°
|
9°
|
8°
|
6°
|
| 300m |
1°
|
6°
|
11°
|
13°
|
9°
|
5°
|
| Valley |
1°
|
7°
|
12°
|
13°
|
10°
|
5°
|
Additional weather information
Meteorologist's view
Moderate UV levels are possible at height around midday, therefore sun protection may be needed.
Weather
Starting with a touch of frost in some sheltered spots, and some valley fog patches. Any valley fog and frost soon clears this morning, leaving a dry day with bright or sunny spells, although the sunshine will be hazy. Clear periods this evening.
Chance of cloud-free hill tops
80% becoming 100% by mid-morning.
Low cloud and visibility
Cloud mostly well above the hilltops. Often hazy visibility with distant hills unclear. Overnight valley fog may temporarily give very poor visibility as it lifts and breaks this morning.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 0mm | 0mm | 0mm |
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
Another dry night with clear spells giving a risk of a slight frost and valley fog patches. However, these soon clear as cloud thickens during the morning, with outbreaks of light rain arriving mid to late afternoon. Becoming dry later in the evening, with clear spells developing late evening.
Chance of cloud-free hill tops
90% temporarily becoming 60% mid to late afternoon.
Maximum wind speed expected
Northwesterly 10 mph gusting 15 mph.
Temperature
- At 600m Plus 5 Celsius rising to plus 11 Celsius.
- Valley Plus 2 Celsius rising to plus 15 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Cloud mostly well above the hilltops, with hazy visibility. Overnight valley fog may temporarily give very poor visibility as it lifts and breaks during the morning. Areas of cloud with bases 600-800m develop through the afternoon, with visibility occasionally poor or very poor in rain and low cloud. Visibility improves to excellent through the evening.
Mountain weather information
Mon 23 Mar
Sunrise:
Sunset:
Dry with bright or sunny spells and cloud above hilltops. Moderate northeasterly winds becoming strong southwesterly. Freezing level above summits.
Tue 24 Mar
Sunrise:
Sunset:
Rain arriving, heavy at times, followed by heavy showers with a risk of hail and thunder. Strong to gale force southwesterly winds. Freezing level lowering near to highest summits later.
Wed 25 Mar
Sunrise:
Sunset:
Broken cloud and heavy showers, possibly wintry. Strong northwesterly winds. Feeling colder with freezing level near highest summits.
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.