Mountain weather
Eryri / Snowdonia
Confidence
High for a switch to more changeable conditions but low for precipitation detail from Monday onwards.
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This eveningSunrise:Sunset:
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Mon 3 AugSunrise:Sunset:
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Tue 4 AugSunrise:Sunset:
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Further outlook
This evening forecast
A generally dry and bright end to the day with some hazy evening sunshine to come, although the odd spot of rain shouldn't be ruled out. Light easterly winds and warm temperatures.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Poor Visibility
Thunderstorms
Mountain weather forecast
A dry day with a risk of showers through the afternoon and evening.
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Time
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Time |
00:00
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03:00
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06:00
|
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)
|
Weather symbols |  |
|
 |
|
 |
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 |
 |
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Chance of
precipitation (at 800m)
|
Chance of precipitation |
20%
|
10%
|
10%
|
10%
|
10%
|
30%
|
60%
|
60%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | E 22mph knots
E
22mph |
SE 23mph knots
SE
23mph |
SE 23mph knots
SE
23mph |
SE 21mph knots
SE
21mph |
S 13mph knots
S
13mph |
SW 11mph knots
SW
11mph |
S 12mph knots
S
12mph |
SE 14mph knots
SE
14mph |
|
600m
|
600m | E 14mph knots
E
14mph |
SE 15mph knots
SE
15mph |
SE 14mph knots
SE
14mph |
SE 15mph knots
SE
15mph |
S 11mph knots
S
11mph |
SW 11mph knots
SW
11mph |
S 9mph knots
S
9mph |
SE 9mph knots
SE
9mph |
|
300m
|
300m | SE 8mph knots
SE
8mph |
SE 8mph knots
SE
8mph |
SE 8mph knots
SE
8mph |
SE 10mph knots
SE
10mph |
S 8mph knots
S
8mph |
SW 7mph knots
SW
7mph |
SW 4mph knots
SW
4mph |
SE 4mph knots
SE
4mph |
|
Valley
|
Valley | SE 7mph knots
SE
7mph |
SE 9mph knots
SE
9mph |
SE 8mph knots
SE
8mph |
SE 10mph knots
SE
10mph |
S 8mph knots
S
8mph |
SW 8mph knots
SW
8mph |
SW 4mph knots
SW
4mph |
S 4mph knots
S
4mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 27mph | 27mph | 28mph | 26mph | 18mph | 16mph | 16mph | 17mph |
|
600m
|
600m | 21mph | 21mph | 20mph | 20mph | 16mph | 16mph | 12mph | 13mph |
|
300m
|
300m | 18mph | 17mph | 17mph | 16mph | 13mph | 13mph | 8mph | 9mph |
|
Valley
|
Valley | 17mph | 18mph | 17mph | 17mph | 13mph | 13mph | 8mph | 9mph |
|
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 |
2600m
|
2400m
|
2200m
|
2800m
|
2800m
|
3200m
|
3500m
|
3500m
|
Additional weather information
Meteorologist's view
A fine day for hill walking with plenty of dry and bright weather as well as light to moderate winds. Plenty of strong August sunshine throughout the day so remember to protect your skin from the strong sunshine as UV levels will be high. It will also turn increasingly warm and humid so plenty of water is advised. Through the afternoon the risk of heavy downpours increases which may limit visibility, and make waterproofs advisable.
Weather
A very 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. Light to moderate easterly winds.
Chance of cloud-free hill tops
>95%.
Low cloud and visibility
All cloud is expected to be above the summits. Very good visibility with views of distant peaks possible. Visibilities may become poor or moderate in any passing showers later.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A cloudy start to Tuesday with scattered showers likely, these potentially heavy and thundery at times, Cloud lifting somewhat through the afternoon with showers becoming more scattered in nature. Another warm and humid day ahead with a light to moderate southwesterly breeze.
Chance of cloud-free hill tops
20% rising to 40%.
Maximum wind speed expected
Southwesterly 20-25mph.
Temperature
- At 800m plus 12 Celsius rising to plus 17 Celsius.
- Valley plus 16 Celsius rising to plus 24 Celsius.
- Freezing level above summits.
Low cloud and visibility
Cloud bases initially above 400-600m, with showers, potentially heavy, through the morning. Cloud bases are expected to rise above summits through the afternoon however some cloud may linger across highest peaks throughout, with showers becoming more isolated. Visibilities initially poor on higher routes in low cloud and hill fog, good visibilities outside cloud. Once cloud bases lift visibilities are expected to be good or very good with moderate or poor visibilities at times in passing cloud. Visibilities potentially falling moderate or poor at times in showers throughout the day.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 5 Aug
A changeable day is likely with a chance of showers, perhaps heavy. Showers dying out through the afternoon. Winds perhaps changing to a westerly direction and staying light to moderate.
Thu 6 Aug
A generally dry day with variable cloud around throughout. The odd light shower cannot be ruled out. Light to moderate northwesterly winds.
Fri 7 Aug
Another day of variable cloud and scattered showers with light to moderate westerly winds.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations