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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Some warm sunshine, but also a risk of thundery showers.


A cloudy start for some on Bank Holiday Monday, but it will quickly brighten up with spells of warm sunshine. Sea breezes will keep it cool on the coast, but inland the warmth may trigger isolated thunderstorms through the afternoon. Maximum Temperature 27C.


Thundery showers will soon die away to leave a dry night. Some low cloud will develop in the east after midnight, giving places here a murky end to the night. Minimum Temperature 11C.


It will quickly brighten up through the morning with some warm sunny spells developing. However there is a risk of isolated thundery showers developing late in the afternoon. Maximum Temperature 24C.

Outlook for Wednesday to Friday:

Bright on Wednesday but with scattered possibly thundery showers. Some sunshine Thursday and Friday, but also the chance of further heavy and thundery showers. Generally very warm.

Day 6 to 15

By the end of the week and during the weekend, there will be a good deal of dry and fine weather around, with sunny spells. However, there is likely to be some mist and low cloud affecting some eastern coastal districts, although with some sunny spells. However, thundery showers continuing on Friday, before dying out on Saturday from the north. Into next week, there will probably be a good deal of dry weather around, with sunny spells. The driest and sunniest conditions likely to be in the north, with the south perhaps cloudier with risk of thundery showers, especially at first, but probably becoming drier and brighter later. After a warm start, temperatures probably falling, but still likely to be above average.

Day 16 to 30

Through this whole period signals are mixed and weak, which generally gives low or very low confidence at this stage. On balance, probably more generally changeable than of late, with spells of rain or showers becoming more frequent and widespread at times, especially during the first half of the period. However, all parts of the country are likely to see some settled spells of weather, particularly in the second half of June. Temperatures probably overall near or slightly above normal. However, there is the potential for further very warm spells of weather to develop across the UK, which are more likely to occur later in the month.

Met Office : WL : 2018-05-28T02:54:02

Issued: 0600 on 2018-05-28 for Brecon Beacons


Early mist and low cloud soon clear, with warm sunshine developing. This may trigger some heavy, locally thundery showers during the afternoon.

Summary It will be a misty start in places, with some low cloud. This will soon clear to allow warm spells of sunshine to develop. Many ranges will stay dry through the day, however some scattered afternoon showers are likely to develop. These will be locally heavy, and bring a chance of isolated slow moving thunderstorms. These will ease through the evening, then low cloud and mist will once again return to eastern ranges overnight.
Chance of Cloud free tops 80-90% with bases lowering 700-850m in showers.
Ground conditions
Visibility Poor, perhaps very poor at first and again during the evening across eastern ranges. Otherwise good or very good, becoming moderate or poor in showers.
Poor Visibility: Low likelihood
Thunderstorms: Medium likelihood
Heavy Persistent Rain: Low likelihood
Strong Sunlight: High likelihood
060708 091011 121314 151617 181920 212223
Weather Sunny intervals Sunny Light rain showers Thundery showers Heavy rain showers Partly cloudy (night)
Rain 00% 00% 20% 30% 20% 00%
Temp (tops) 13 15 17 18 18 16
Wind (tops) 7 6 7 8 8 9
Freezing Level 2800m 2800m 2800m 2900m 2900m 3000m
Day 1

Early low cloud will be slow to clear, especially across eastern ranges. The best of the brightness will be in the west, with plenty of sunny spells developing. Most ranges will remain dry, with only the odd light shower possible during the afternoon, especially in the east.

Ice 2500-3000m
Visibility Poor, perhaps very poor at first and again during the evening across far eastern ranges. Otherwise good or very good, becoming moderate in any showers.
Wind East 10-15mph.
Temp Plus 10C rising 17C for a time during the afternoon (at high level)
Day 2

Similar to Tuesday with most stays dry with plenty of sunshine, but cloudier in the east, particularly early and late in the day. However risk of heavy showers spreading from the east during the evening. Summit winds light to moderate from the east. Freezing level above all summits.

Day 3

Showery at first, with a risk of thunderstorms, particularly during the afternoon and into the evening. Winds will remain light, with freezing level well above all summits.

Day 4

A similar day to Thursday, with sunshine and showers, these mainly developing for the afternoon and likely heavy and thundery at times. Light winds and freezing level well above all summits.

Data: Met Office