Mountain weather
Eryri / Snowdonia
Confidence
High for overall pictures. Moderate for low and patchy cloud detail.
-
Mon 20 JulSunrise:Sunset:
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Tue 21 JulSunrise:Sunset:
-
Further outlook
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Mountain weather forecast
Another dry and sunny day ahead.
|
Time
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Time |
06:00
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09:00
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12:00
|
15:00
|
18:00
|
21:00
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|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
|
Weather symbols |  |
 |
 |
|
|
 |
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | NW 8mph knots
NW
8mph |
NW 9mph knots
NW
9mph |
NW 9mph knots
NW
9mph |
N 10mph knots
N
10mph |
N 10mph knots
N
10mph |
N 13mph knots
N
13mph |
|
600m
|
600m | N 5mph knots
N
5mph |
N 8mph knots
N
8mph |
N 9mph knots
N
9mph |
N 9mph knots
N
9mph |
N 9mph knots
N
9mph |
N 7mph knots
N
7mph |
|
300m
|
300m | NW 3mph knots
NW
3mph |
NW 7mph knots
NW
7mph |
NW 8mph knots
NW
8mph |
N 9mph knots
N
9mph |
N 8mph knots
N
8mph |
N 4mph knots
N
4mph |
|
Valley
|
Valley | NW 3mph knots
NW
3mph |
NW 7mph knots
NW
7mph |
NW 8mph knots
NW
8mph |
N 9mph knots
N
9mph |
N 8mph knots
N
8mph |
NW 4mph knots
NW
4mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 9mph | 11mph | 13mph | 14mph | 14mph | 16mph |
|
600m
|
600m | 7mph | 11mph | 12mph | 13mph | 13mph | 10mph |
|
300m
|
300m | 4mph | 9mph | 12mph | 12mph | 11mph | 8mph |
|
Valley
|
Valley | 4mph | 9mph | 12mph | 13mph | 11mph | 7mph |
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | ||||||
|
600m
|
600m | ||||||
|
300m
|
300m | ||||||
|
Valley
|
Valley | ||||||
| Freezing Level | Freezing Level |
2800m
|
2900m
|
3000m
|
3000m
|
2900m
|
2900m
|
Additional weather information
Meteorologist's view
Great day to be in the national park with plenty of dry and bright weather. Low cloud or mist and fog may make navigation challenging at first but quickly improving. UV levels will be high with appropriate sun protection needed. Warm temperatures are also expected, with sufficient hydration also required.
Weather
Some patchy low cloud mainly to the north of the park initially, as well as some isolated mist or fog in valleys. Mist and fog quickly clearing with cloud gradually lifting through the morning to leave another dry and fine day ahead with clear skies initially then variable cloud around at times through the afternoon. Light to moderate northerly winds throughout.
Chance of cloud-free hill tops
80% rising to >95%
Low cloud and visibility
Cloud initially above 300-500m, mainly to the north of the park, as well as some patchy mist and fog in valleys. This will limit visibilities at low levels and highest peaks initially. Mist and fog quickly clearing with low level cloud slowly lifting and breaking to leave very good visibilities with views of distant peak possible.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A similar day ahead with patchy low cloud to the north of the park initially, as well as most mist and fog patches at low levels. This is expected to clear through the morning to leave a dry and fine day with lengthy sunshine. Variable cloud increasing through the afternoon with sunny periods still likely. Light to moderate northerly winds
Chance of cloud-free hill tops
40% rising to 85%
Maximum wind speed expected
Northerly 20-10 mph.
Temperature
- At 800m plus 10 Celsius rising to plus 14 Celsius.
- Valley plus 13 Celsius rising to plus 20 Celsius.
- Freezing level above summits.
Low cloud and visibility
Cloud initially above 300-500m, mainly to the north of the park, as well as more extensive mist and fog in valleys. This will limit visibilities at low levels and highest peaks initially. Mist and fog quickly clearing with low level cloud slowly lifting and breaking to leave very good visibilities with views of distant peak possible.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 22 Jul
A cloudier day to start with some hill fog possible, this will lift and break to leave a fine and bright afternoon. A light to moderate northerly wind. Freezing level above summits.
Thu 23 Jul
Limited low cloud Thursday morning quickly clearing. Leaving a fine and probably largely sunny day, some patchy cloud through the afternoon but peaks likely clear of cloud. Gentle to moderate northerly winds. Freezing level above summits.
Fri 24 Jul
Another largely fine day with variable cloud. Gentle to moderate northerly winds. Freezing level above summits.
Mountain weather information
Wed 22 Jul
A cloudier day to start with some hill fog possible, this will lift and break to leave a fine and bright afternoon. A light to moderate northerly wind. Freezing level above summits.
Thu 23 Jul
Limited low cloud Thursday morning quickly clearing. Leaving a fine and probably largely sunny day, some patchy cloud through the afternoon but peaks likely clear of cloud. Gentle to moderate northerly winds. Freezing level above summits.
Fri 24 Jul
Another largely fine day with variable cloud. Gentle to moderate northerly winds. Freezing level above summits.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations