Mountain weather
Bannau Brycheiniog / Brecon Beacons Mountain weather forecast table
Confidence
High in overall weather story, though moderate in shower details throughout 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 rather grey start but cloud breaking for a time to allow some sunny spells. A mainly dry day but a few spots of rain possible at times. Feeling fresher than of late.
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 600m) |
|
|
|
|
|
|
Chance of precipitation (at 600m) |
30% | 10% | 10% | 10% | 10% | 20% |
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
10
|
N
14
|
N
10
|
N
10
|
N
10
|
NE
10
|
| 300m |
NE
3
|
NE
8
|
N
6
|
N
7
|
N
6
|
NE
5
|
| Valley |
E
2
|
NE
6
|
N
6
|
N
7
|
N
6
|
NE
4
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m | 12 | 18 | 13 | 14 | 13 | 16 |
| 300m | 7 | 13 | 11 | 13 | 11 | 12 |
| Valley | 5 | 11 | 11 | 14 | 12 | 11 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
6°
|
7°
|
9°
|
9°
|
8°
|
6°
|
| 300m |
9°
|
11°
|
12°
|
12°
|
11°
|
9°
|
| Valley |
9°
|
12°
|
13°
|
13°
|
12°
|
9°
|
| Freezing Level |
1,700m
|
1,300m
|
1,500m
|
1,600m
|
1,500m
|
1,300m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 600m |
3°
|
4°
|
6°
|
6°
|
6°
|
3°
|
| 300m |
8°
|
9°
|
11°
|
10°
|
10°
|
8°
|
| Valley |
9°
|
10°
|
12°
|
11°
|
10°
|
8°
|
Additional weather information
Meteorologist's view
It will be feeling cooler than recent days, especially at height with temperatures feeling near freezing at height late in the evening. UV levels will be moderate to high in any sunnier interludes so sun protection is advised.
Weather
Thicker overnight cloud giving some very light rain or drizzle first thing, this lifting and breaking slightly after dawn allowing some sunny intervals to develop. Cloud tending to thicken again during the second half of the afternoon with perhaps the odd spot of rain possible into the late evening.
Chance of cloud-free hill tops
80% first thing rising to >95% through the morning.
Low cloud and visibility
Cloud bases might temporarily shroud some higher summits first thing, but quickly lifting above summits during the early morning. Generally good or very good visibilities throughout the day, perhaps falling to poor or very poor in early rain or drizzle.
Recent rainfall
Location: Neuadd (Near Pontsticill)
Altitude: 353m
| Last 24 hours | Last 48 hours | Last 72 hours |
|---|---|---|
| 1mm | 20.6mm | 30.4mm |
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
Patchy rain will move south across the park early Wednesday, with some spots lingering throughout the morning in the west. Turning brighter into the afternoon with some spells of sunshine developing. Skies tending to clear further into Wednesday evening. A rather cool feeling day for the time of year.
Chance of cloud-free hill tops
30% during the early hours of Wednesday but rising to 90% by mid-morning.
Maximum wind speed expected
Northeasterly 20-25mph.
Temperature
- At 600m Plus 02 Celsius, rising to plus 06 Celsius.
- Valley Plus 04 Celsius, rising to Plus 13 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Cloud bases falling to around 500m throughout the early hours, especially during any outbreaks of rain or drizzle. Bases then lifting above summits throughout the morning. Visibilities poor or very poor during the early hours, especially at height. Visibilities then gradually improving to very good or excellent throughout the morning.
Mountain weather information
Thu 7 May
Sunrise:
Sunset:
A mix of sunny spells and scattered showers. A small chance of the odd heavier shower. Light to moderate southerly winds.
Fri 8 May
Sunrise:
Sunset:
A similar day to Thursday with a mix of sunny spells and a scattering of showers. Feeling a little warmer with light to moderate southeasterly winds.
Sat 9 May
Sunrise:
Sunset:
A band of rain likely to move up from the south throughout the day with scattered showers following. A risk of some heavier rain for a time. Moderate easterly 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.