Mountain weather
Eryri / Snowdonia
Confidence
High for a generally dry weekend until Sunday evening. Low for details of rain and showers early next week.
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This eveningSunrise:Sunset:
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Sat 1 AugSunrise:Sunset:
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Sun 2 AugSunrise:Sunset:
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Further outlook
This evening forecast
A mainly dry evening with some late sunshine though turning cloudier from the west.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Mountain weather forecast
Cloud breaking to leave increasingly prolonged periods of strong sunshine.
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Time
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Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
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Weather symbols |  |
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 |
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 |
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Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
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10%
|
10%
|
10%
|
10%
|
<5%
|
<5%
|
10%
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Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
W 10mph knots
W
10mph |
S 6mph knots
S
6mph |
|
600m
|
600m | W 7mph knots
W
7mph |
W 8mph knots
W
8mph |
W 8mph knots
W
8mph |
W 12mph knots
W
12mph |
W 12mph knots
W
12mph |
W 12mph knots
W
12mph |
W 8mph knots
W
8mph |
S 8mph knots
S
8mph |
|
300m
|
300m | W 3mph knots
W
3mph |
SW 4mph knots
SW
4mph |
W 4mph knots
W
4mph |
W 9mph knots
W
9mph |
W 10mph knots
W
10mph |
W 10mph knots
W
10mph |
W 6mph knots
W
6mph |
S 5mph knots
S
5mph |
|
Valley
|
Valley | W 4mph knots
W
4mph |
SW 4mph knots
SW
4mph |
W 4mph knots
W
4mph |
W 10mph knots
W
10mph |
W 10mph knots
W
10mph |
W 10mph knots
W
10mph |
W 6mph knots
W
6mph |
S 6mph knots
S
6mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 17mph | 16mph | 17mph | 19mph | 19mph | 20mph | 14mph | 8mph |
|
600m
|
600m | 10mph | 11mph | 10mph | 17mph | 17mph | 17mph | 12mph | 10mph |
|
300m
|
300m | 7mph | 9mph | 8mph | 15mph | 15mph | 15mph | 9mph | 9mph |
|
Valley
|
Valley | 7mph | 9mph | 8mph | 15mph | 16mph | 15mph | 10mph | 10mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | ||||||||
|
600m
|
600m | ||||||||
|
300m
|
300m | ||||||||
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Valley
|
Valley | ||||||||
| Freezing Level | Freezing Level |
1900m
|
1800m
|
1900m
|
1800m
|
1900m
|
1900m
|
1900m
|
1900m
|
Additional weather information
Meteorologist's view
A fine day for hill walking once any cloud lifts clear of the summits. Despite it not feeling especially hot, remember to protect your skin from the strong sunshine as UV levels will be high.
Weather
Dry through the early hours with clear spells and cloudier periods. Perhaps turning mainly cloudy by dawn in the west with a small chance of a shower. Often cloudy through the morning with occasional bursts of sunshine, more especially in the east. Cloud breaking more widely later in the morning to allow an increasingly sunny afternoon and evening.
Chance of cloud-free hill tops
70% becoming 95%
Low cloud and visibility
Periods of cloud above 800m, mainly west of Capel Curig, until mid to late morning. Cloud lifting and clearing most summits by early to mid afternoon. Poor visibilities in the cloud on the highest routes but otherwise very good visibility with excellent air clarity.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A chilly start with any valley mist rapidly clearing to leave a dry morning with sunny periods, though the sunshine perhaps turning hazier. Probably becoming cloudier through the day with the chance of the odd spot of rain from the thickest cloud by the evening.
Chance of cloud-free hill tops
Greater than 95%.
Maximum wind speed expected
Easterly 15-20 mph.
Temperature
- At 800m Plus 8 Celsius rising to plus 19 Celsius.
- Valley Plus 4 Celsius rising to plus 25 Celsius.
- Freezing level Well above the summits.
Low cloud and visibility
All cloud is expected to be above the summits. Very good visibility.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 3 Aug
A warm and increasingly humid day with a mixture of cloud and bright or sunny spells. A chance of showers with potentially heavy and thundery downpours later, albeit with considerable uncertainty in the details. Moderate easterly winds.
Tue 4 Aug
A very warm and humid day with a chance of heavy downpours or thunderstorms. Dry periods are also likely. Periods of hill fog with a light to moderate southerly breeze.
Wed 5 Aug
A changeable day is likely with a chance of showers, perhaps heavy. Winds perhaps switching to a westerly direction and staying light to moderate.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations