Pen Y Fan and Corn Du from Storey Arms walk

A classic, and very popular, short walk climbing up to the two highest peaks in the Brecon Beacons along an engineered path.

Hiking Weather

10 Day Forecast for Storey Arms

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Rain on Wednesday, then feeling fresher on Thursday

This Evening and Tonight:

Staying dry and on the mild side for much of the night. The cloud will thicken through the early hours of Wednesday morning, however, bringing patchy outbreaks of drizzle to western parts along with low cloud, mist and some fog. Minimum Temperature 16C.


Cloudy with rain pushing southeastwards. This may be heavy at times, particularly over high ground. However, by the evening it will turn drier in the north and west. Maximum Temperature 23C.

Outlook for Thursday to Saturday:

Thursday and Friday will be fresher, and breezy with a few showers. Rain is likely later on Friday, clearing on Saturday morning, then it will become brighter though breezy.

Day 6 to 15

After a cold and dry start on Sunday, cloud and rain is likely to spread east into western areas later in the day. For Bank Holiday Monday, the rain is likely to gradually continue south and east, with drier and brighter conditions following. Temperatures should be around the seasonal average. The middle part of the week is likely to see a north-south split in the weather. Northern areas will generally be more changeable with some rain or showers at times, but it is likely to become more settled in the south with warmer temperatures. Drier and warmer weather may become more widely established into early September, as high pressure starts to build in from the south.

Day 16 to 30

Through the beginning and middle part of September, there is an increasing chance that much of the UK will see a good deal of dry, warm and settled weather. Northern and western areas could occasionally have wet and windy spells towards the middle part of the month, but these should be short-lived. Temperatures are likely to be generally warm across the UK, with a chance of very warm conditions developing in the south.

Met Office : WL : 2018-08-21T14:30:04

Issued: 1800 on 2018-08-21 for Brecon Beacons


Cloudy with outbreaks of rain. Some brighter spells in east

Summary Cloudy with patchy drizzle through the early hours, although some clearer spells likely in the east. Then a bright start in the east but generally a cloudy morning and early afternoon with further patchy drizzle. More persistent rain and drizzle is expected to spread southeast from mid-afternoon and persist through much of the rest of the day.
Chance of Cloud free tops Little chance through the morning with periods or persistent cloud above 450m with patches below, but nearer 60% in the morning across the east with cloud more occasional above 600m.
Ground conditions
Visibility Good falling to just a few kilometres in rain and more especially drizzle.
Poor Visibility: High likelihood
Strong Sunlight: Low likelihood
060708 091011 121314 151617 181920 212223
Weather Cloudy Cloudy Cloudy Sunny intervals Cloudy Light rain
Rain 20% 30% 30% 20% 20% 60%
Temp (tops) 13 14 14 14 15 15
Wind (tops) 14 16 17 18 20 21
Freezing Level 3400m 3300m 3100m 3100m 3200m 3400m
Day 1

Rather cloudy at first with a few spots of rain and drizzle but becoming dry through the early hours with clear spells developing. Then a bright day with sunny spells and the occasional heavy shower, especially in the late afternoon.

Ice Above the summits
Visibility Very good falling to several kilometres in showers.
Wind Westerly 10-15mph increasing 20mph through the morning, risk of gusts around 35mph in or near showers in the late afternoon.
Temp Around plus 11 Celsius (at high level)
Day 2

Clear or sunny spells and a few showers but cloud increasing later. Fresh westerly winds. Freezing level above the summits.

Day 3

A cloudy start with outbreaks of occasionally heavy rain, but becoming drier and brighter through the morning to leave a mainly dry afternoon with some long sunny spells. Fresh westerly then northwesterly winds. Freezing level above the summits.

Day 4

Mainly dry morning but increasing cloud looks set to bring occasionally heavy afternoon rain. Winds backing more southerly and strengthening. Freezing level above the summits.

Data: Met Office