Mountain weather
Eryri / Snowdonia
Confidence
High for overall dry bright and warm weather, moderate for extent of low cloud overnight Saturday into Sunday.
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Sat 11 JulSunrise:Sunset:
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Sun 12 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
Gales
Mountain weather forecast
A dry and very warm day with plenty of sunshine.
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Time
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Time |
06:00
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09:00
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12:00
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15:00
|
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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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 | SE 8mph knots
SE
8mph |
S 5mph knots
S
5mph |
NE 7mph knots
NE
7mph |
E 9mph knots
E
9mph |
NE 19mph knots
NE
19mph |
E 24mph knots
E
24mph |
|
600m
|
600m | SE 5mph knots
SE
5mph |
N 5mph knots
N
5mph |
N 9mph knots
N
9mph |
N 11mph knots
N
11mph |
N 8mph knots
N
8mph |
E 13mph knots
E
13mph |
|
300m
|
300m | E 4mph knots
E
4mph |
N 6mph knots
N
6mph |
N 7mph knots
N
7mph |
N 9mph knots
N
9mph |
N 5mph knots
N
5mph |
E 9mph knots
E
9mph |
|
Valley
|
Valley | E 4mph knots
E
4mph |
N 6mph knots
N
6mph |
N 7mph knots
N
7mph |
NW 9mph knots
NW
9mph |
N 6mph knots
N
6mph |
E 10mph knots
E
10mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 10mph | 6mph | 11mph | 13mph | 23mph | 31mph |
|
600m
|
600m | 8mph | 7mph | 12mph | 14mph | 12mph | 23mph |
|
300m
|
300m | 8mph | 8mph | 10mph | 12mph | 9mph | 21mph |
|
Valley
|
Valley | 8mph | 8mph | 11mph | 13mph | 9mph | 21mph |
|
Time
|
Time |
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 |
3200m
|
3200m
|
3200m
|
3100m
|
3100m
|
3100m
|
Additional weather information
Meteorologist's view
A brilliant day to be in the national park, however sun protection application and re-application is advised due to very high UV levels. Additionally, the high temperatures may exhaust individuals, especially in the afternoon. Frequent rehydration and taking regular breaks from strenuous activities is advisable. A hat and eye protection should also be considered.
Weather
Odd localised patchy of mist or fog in valley dissipating quickly after dawn. Then staying warm with plenty of sunshine throughout the day. Brisk easterly winds developing through the afternoon, particularly over peaks, this will off some relief from the heat. Although still feeling very warm or locally hot in sheltered locations.
Chance of cloud-free hill tops
90% quickly rising to 100%.
Low cloud and visibility
Any early morning mist which may reduce visibilities a touch in valleys should clear swiftly. Fair weather cloud during the rest of the day expected to be above the summits. Excellent visibilities, with views of distant summits, away from the early morning mist and fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Some patchy low cloud likely pushing in from the east through the overnight period, mainly effecting the east of the park. This should quickly clear soon after dawn to leave a dry and bright day with lengthy sunshine and a brisk easterly breeze once more.
Chance of cloud-free hill tops
70% rising to 100%.
Maximum wind speed expected
Easterly 25-35 mph.
Temperature
- At 800m plus 11 Celsius rising to plus 21 Celsius.
- Valley plus 17 Celsius rising to plus 27 Celsius
- Freezing level above summits.
Low cloud and visibility
Patchy cloud bases initially above 400-600 m quickly lifting and dissipating to leave cloud free summits. Low cloud, mainly to the east of the park, may limit visibilities briefly around dawn on highest peaks. This will quickly clear away to leave excellent visibilities with views of distant peaks possible.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 13 Jul
A dry and bright start to the day with cloud gradually increasing from the south later. Temperatures slightly lower than on Sunday, but still warm or very warm, sheltered from the brisk easterly wind. Freezing level above summits.
Tue 14 Jul
Some low cloud likely once again to start Tuesday, once again clearing away quickly to leave another fine and dry day with plenty of sunshine. Brisk easterly winds over summits allowing it to feel cooler at times, but still very warm or locally hot. Freezing level above summits.
Wed 15 Jul
Another dry and bright day ahead with patchy cloud around at times, there is a risk of some isolated showers through the before dawn. Brisk easterly winds continue. Freezing level above summits.
Mountain weather information
Mon 13 Jul
A dry and bright start to the day with cloud gradually increasing from the south later. Temperatures slightly lower than on Sunday, but still warm or very warm, sheltered from the brisk easterly wind. Freezing level above summits.
Tue 14 Jul
Some low cloud likely once again to start Tuesday, once again clearing away quickly to leave another fine and dry day with plenty of sunshine. Brisk easterly winds over summits allowing it to feel cooler at times, but still very warm or locally hot. Freezing level above summits.
Wed 15 Jul
Another dry and bright day ahead with patchy cloud around at times, there is a risk of some isolated showers through the before dawn. Brisk easterly winds continue. Freezing level above summits.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations