Mountain weather
Eryri / Snowdonia
Confidence
High overall. Moderate for variable cloud detail.
-
Sun 19 JulSunrise:Sunset:
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Mon 20 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
A dry day with variable cloud around through the morning.
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
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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 | W 8mph knots
W
8mph |
NW 9mph knots
NW
9mph |
N 10mph knots
N
10mph |
N 13mph knots
N
13mph |
N 11mph knots
N
11mph |
N 11mph knots
N
11mph |
|
600m
|
600m | W 6mph knots
W
6mph |
N 8mph knots
N
8mph |
N 10mph knots
N
10mph |
N 13mph knots
N
13mph |
N 10mph knots
N
10mph |
N 7mph knots
N
7mph |
|
300m
|
300m | NW 2mph knots
NW
2mph |
NW 5mph knots
NW
5mph |
N 9mph knots
N
9mph |
N 11mph knots
N
11mph |
N 8mph knots
N
8mph |
NW 4mph knots
NW
4mph |
|
Valley
|
Valley | NW 2mph knots
NW
2mph |
NW 5mph knots
NW
5mph |
N 9mph knots
N
9mph |
N 11mph knots
N
11mph |
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 | 10mph | 12mph | 14mph | 17mph | 15mph | 15mph |
|
600m
|
600m | 8mph | 11mph | 14mph | 17mph | 14mph | 10mph |
|
300m
|
300m | 3mph | 8mph | 12mph | 16mph | 12mph | 7mph |
|
Valley
|
Valley | 3mph | 8mph | 13mph | 16mph | 12mph | 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 |
2100m
|
2000m
|
2000m
|
1900m
|
1900m
|
2300m
|
Additional weather information
Meteorologist's view
Great day to be in the national park with plenty of dry and bright weather. UV levels will be high with appropriate sun protection needed. Warm temperatures are also expected, with sufficient hydration also required.
Weather
Very isolated patches of lower cloud and mist or fog in the valley at first, which will quickly clear. Then follows another dry and bright day, with plenty of sunny spells. Light northerly winds.
Chance of cloud-free hill tops
80% rising to >95%
Low cloud and visibility
Low risk of some cloud above 300-500m through the early hours and at first in the morning, as well as isolated mist and fog patches in valleys, this may limit visibilities at low levels initially. Clearing quickly, with any further cloud remaining above the summits. Largely good visibility, with distant hills visible.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Rather cloudy to begin the day, with the potential for hill fog at times. This will then clear to leave variable cloud and bright or sunny spells. Perhaps the odd light shower possible, but likely staying dry. Temperatures a little above normal and feeling warm with only light winds. Freezing level above summits.
Chance of cloud-free hill tops
40% slowly rising to 90%
Maximum wind speed expected
Northerly 15-20 mph.
Temperature
- At 800m plus 7 Celsius rising to plus 13 Celsius.
- Valley plus 12 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 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
No recent ground conditions report available.
Mountain weather information
Tue 21 Jul
Another cloudy start, probably clearing to leave fine and largely sunny day, with hills likely clear of cloud. Winds remaining light with temperatures around or just above normal. Freezing level above summits.
Wed 22 Jul
Cloudy conditions with hill fog to begin, lowest cloud lifting through the day but remaining cloudy, often shrouding highest peaks. Freezing level above summits.
Thu 23 Jul
A similar day ahead with low cloud and hill fog initially, likely lifting at lower levels but remaining over highest peaks. Freezing level above summits.
Mountain weather information
Tue 21 Jul
Another cloudy start, probably clearing to leave fine and largely sunny day, with hills likely clear of cloud. Winds remaining light with temperatures around or just above normal. Freezing level above summits.
Wed 22 Jul
Cloudy conditions with hill fog to begin, lowest cloud lifting through the day but remaining cloudy, often shrouding highest peaks. Freezing level above summits.
Thu 23 Jul
A similar day ahead with low cloud and hill fog initially, likely lifting at lower levels but remaining over highest peaks. Freezing level above summits.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations