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Brecon Beacons

Weather hazards over 300m on Mon 30 May 2016

High risk

Strong sunlight
Prolonged sunshine will bring high UV levels, and a risk of sunburn unless protected.

Medium risk

No medium risks
none

Low risk

No low risks
none

No risk

Blizzards
none
Heavy snow
none
Storm force winds
none
Gales
none
Severe chill effect
none
Persistent extensive hill fog
none
Thunderstorms
none
Heavy persistent rain
none

Mon 30 May 2016

Any overnight haze or mist will very quickly clear to leave dry and generally sunny conditions across the park. It will be a warm day, but with a cool northerly breeze, conditions across the mountains will be ideal for most activities. Whilst cloud will build through the day, frequent sunny intervals will lead to high levels of UV, especially on exposed ridges and tops, so adequate sun protection will be essential.

Time
0000 to 0300 0300 to 0600 0600 to 0900 0900 to 1200 1200 to 1500 1500 to 1800 1800 to 2100 2100 to 2400
Weather
Clear night Partly cloudy night Sunny day Sunny day Sunny day Sunny intervals Sunny intervals Partly cloudy night
Precipitation probability
0% 0% 0% 0% 0% 0% 0% 0%

Visibility

Very good to Excellent throughout.

Hill Fog

Nil.

Max wind above 400m

Northeasterly 15-20mph increasing to Northerly 25-30mph by dusk.

Temperature

Valleys:
Plus 9 becoming Plus 19 Celsius.
800m:
Plus 7 Celsius becoming Plus 12 Celsius.
Freezing level:
Above the summits.

Recent Rainfall

Location:
Neuadd Rain (near Pontsticill)
Altitude:
353 m
Rainfall measured at:
1500 on Sun 29 May 2016
Last 24 hours:
0.0 mm
Last 48 hours:
6.0 mm
Last 72 hours:
6.4 mm

Rainfall data provided by the Environment Agency. The Met Office is not responsible for content provided by third parties and may remove this data without warning.

Tue 31 May 2016

Increasingly cloudy conditions overnight, and winds will gradually strengthen. A dry morning will follow with some hazy sunshine possible, but becoming increasingly limited by the afternoon. A band of rain will then spread into the park around dusk, with some hill fog descending upon eastern slopes. Western peaks will have the best chance of remaining dry.

Visibility

Very good at first, but decreasing to good by the late evening, and falling to moderate in any rainfall. Turning very poor on some eastern slopes during hill fog.

Hill Fog

Generally nil, but some patches of hill fog forming above 600m around dusk, as clouds gradually descend onto some eastern slopes and rain spreads in.

Max wind above 400m

Northerly 40-45mph.

Temperature

Valleys:
Plus 10 Celsius becoming Plus 16 Celsius.
800m:
Plus 7 Celsius becoming Plus 11 Celsius.
Freezing level:
Above the summits.

Wed 01 Jun 2016

A rather grey and damp day, with outbreaks of rain at times and hill fog obscuring many eastern peaks. Some brighter spells will remain possible between showers, with southern and eastern peaks having the best chance of seeming sunshine. Remaining breezy, but less so than on Tuesday.

Thu 02 Jun 2016

Another cloudy start, with the odd spot of drizzle, Sunny spells are expected to develop through the day, bringing some warm sunshine, although the fresh northeasterly breeze will persist. Hill fog will continue to shroud the many summits.

Fri 03 Jun 2016

A generally dry day, with any early cloud and hill fog lifting and breaking, with winds also gradually easing. Whilst the odd patch of hill fog could persist, and the occasional spot of rain cannot be ruled out, there will be some fine conditions to be found. The best of these remaining in the west.

Issued at: 1731 on Sun 29 May 2016