Fan Dance (Brecon Beacons endurance walk) walk

SAS fitness exercise. Storey Arms over Pen y Fan to Torpantau, and back again, against the clock, with a full pack

Hiking Weather

10 Day Forecast for Storey Arms

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Blustery, heavy showers interspersed with sunny spells


A blustery, cool day with a mixture of sunny spells and showers which will be heavy at times with a risk of hail and thunder. During the evening, winds will ease and showers will become less frequent. Maximum Temperature 15C.


Showers clearing, then chilly with clear spells for much of the night, however cloud is set to thicken across the southwest towards dawn with a chance of rain. Minimum Temperature 7C.


Cloudy with rain arriving in most areas during the morning. This will then linger, giving a dull and wet day with heavy rain in places at times. Maximum Temperature 14C.

Outlook for Sunday to Tuesday:

Wet and windy weather gradually clearing on Sunday, then dry and sunny on Monday and Tuesday with light winds and a risk of patchy fog and frost forming overnight.

Day 6 to 15

For most of the UK it looks like the weather should remain largely settled through the rest of September. Most places will have long sunny periods and generally light winds. However, some mist and fog patches will form during the nights. The far north and northwest will most likely turn a little more changeable through next week with some rain and strong winds. Weakening bands of rain are expected to push southeastwards across the UK but they will become increasingly patchy as they go. Days will be warm for many, at least at first, but nights will be chilly with some localised frost. Into the start of October many parts are set to remain mostly settled, though some wet and windy weather is possible further north.

Day 16 to 30

Settled conditions are expected to dominate across much of the UK through the beginning of this period, especially in the south. There should be a good deal of dry and bright weather with any brief wet and windy spells likely to be confined to the north of the UK. Increasingly long nights nights will lead to a greater risk of patches of fog forming overnight and some places may also see some frost. Despite chilly nights, any sunshine by day will give a rather warm feel. Later on in this period there is considerable uncertainty in the forecast with a chance that some more unsettled weather may become established again.

Met Office : WL : 2018-09-21T02:02:14

Issued: 0600 on 2018-09-21 for Brecon Beacons


Blustery occasionally heavy showers. Some brighter intervals. Feeling rather cold.

Summary Often cloudy across the hills, however some sunny intervals are likely, especially away from the shrouded summits. Frequent, blustery and occasionally heavy showers are likely, moving quickly through on the strong westerly breeze. These could include the odd burst of hail, along with the risk of lightning. Whilst not quite as windy as on Thursday, winds will remain strong until the evening. Showers will also gradually fade away later in the day.
Chance of Cloud free tops 70% for much of the day, however cloud often obscuring some summits above 800m. Occasional patches falling as low as 500m during heavy showers. Increasing to 90% into the late afternoon, as cloud clears and showers fade.
Ground conditions
Visibility : Very good views likely, outside of any showers. However some rapid reductions likely as cloud descends, and showers move through. This likely to bring some transitory poor or very poor visibilities, then improving as showers clear.
Gales: High likelihood
Severe Chill Effect: Low likelihood
Poor Visibility: Medium likelihood
Thunderstorms: Medium likelihood
Heavy Persistent Rain: Low likelihood
060708 091011 121314 151617 181920 212223
Weather Light rain Heavy rain showers Heavy rain showers Light rain showers Partly cloudy (night) Partly cloudy (night)
Rain 60% 40% 40% 40% 30% 20%
Temp (tops) 5 6 8 9 8 7
Wind (tops) 25 28 33 29 23 23
Freezing Level 1200m 1200m 1400m 1500m 1500m 1400m
Day 1

Clear spells are likely to develop overnight, and turning cold, especially on the tops. However cloud soon thickens from the southwest during the morning, with rain spreading in by the afternoon. Whilst mostly light, this will turn persistent with the odd heavier burst possible later in the day.

Ice Above the summits
Visibility : Some very good views possible at first, but falling to moderate to poor as rain develops during the afternoon
Wind Westerly 15mph, gusting 25mph. Becoming Southeasterly 20mph, gusting 25mph from midday.
Temp Plus 7C (at high level)
Day 2

Some significant uncertainty in detail, however further outbreaks of rain likely, especially early in the day, and a risk of very strong winds for a time. Sunshine and blustery showers likely later. Freezing levels above the summits

Day 3

The odd shower remains possible during the morning, however much more benign and settled weather is expected than during the previous week, with winds becoming light. Some autumnal sunshine likely, but also remaining rather cool.

Day 4

After a cold start, with some valley frost possible, a dry and largely sunny day is expected. Winds will remain light with freezing levels above the summits.

Data: Met Office