Mountain weather
Eryri / Snowdonia
Confidence
High overall but lower for location of heaviest rain and timing of front Tuesday.
-
This eveningSunrise:Sunset:
-
Mon 28 SepSunrise:Sunset:
-
Tue 29 SepSunrise:Sunset:
-
Further outlook
This evening forecast
Plenty of dry and bright weather to end the day with winds easing.
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 and fine day ahead.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols |  |
|
|
 |
|
|
|
 |
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
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 29mph knots
E
29mph |
E 31mph knots
E
31mph |
E 33mph knots
E
33mph |
E 33mph knots
E
33mph |
SE 34mph knots
SE
34mph |
SE 31mph knots
SE
31mph |
SE 31mph knots
SE
31mph |
SE 33mph knots
SE
33mph |
|
600m
|
600m | SE 14mph knots
SE
14mph |
SE 16mph knots
SE
16mph |
SE 19mph knots
SE
19mph |
SE 21mph knots
SE
21mph |
SE 24mph knots
SE
24mph |
SE 22mph knots
SE
22mph |
SE 22mph knots
SE
22mph |
SE 23mph knots
SE
23mph |
|
300m
|
300m | SE 9mph knots
SE
9mph |
SE 12mph knots
SE
12mph |
E 13mph knots
E
13mph |
SE 16mph knots
SE
16mph |
SE 19mph knots
SE
19mph |
SE 19mph knots
SE
19mph |
SE 19mph knots
SE
19mph |
SE 20mph knots
SE
20mph |
|
Valley
|
Valley | SE 9mph knots
SE
9mph |
SE 11mph knots
SE
11mph |
SE 13mph knots
SE
13mph |
SE 16mph knots
SE
16mph |
SE 19mph knots
SE
19mph |
SE 18mph knots
SE
18mph |
SE 18mph knots
SE
18mph |
SE 19mph knots
SE
19mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 36mph | 39mph | 43mph | 44mph | 46mph | 45mph | 46mph | 51mph |
|
600m
|
600m | 22mph | 26mph | 30mph | 32mph | 36mph | 36mph | 38mph | 41mph |
|
300m
|
300m | 20mph | 24mph | 25mph | 28mph | 34mph | 34mph | 35mph | 38mph |
|
Valley
|
Valley | 19mph | 23mph | 24mph | 28mph | 34mph | 32mph | 34mph | 36mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | ||||||||
|
600m
|
600m | ||||||||
|
300m
|
300m | ||||||||
|
Valley
|
Valley | ||||||||
| Freezing Level | Freezing Level |
1800m
|
1900m
|
2300m
|
2700m
|
3000m
|
3100m
|
3100m
|
3400m
|
Additional weather information
Meteorologist's view
A great day for outdoor activities in the national park with plenty of dry and bright weather on offer. UV levels are still expected to be moderate so sun protection is advised.
Weather
High pressure will bring a mostly dry day with lengthy sunny periods, once any early isolated mist and valley fog has cleared.
Chance of cloud-free hill tops
>95%
Low cloud and visibility
Initially, some isolated mist and valley fog may form in prone locations, though this should clear quickly after dawn. Cloud is expected to remain above summit level throughout the day. Visibility may be poor or very poor in any early mist or fog, but once this clears, good visibility is expected with excellent views and the potential to see distant peaks.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Turning unsettled and windy with strong southeasterly winds developing and a chance of summit gales later. Low cloud spreading in overnight bringing a risk of hill fog and drizzly rain through the morning. This is expected to lift and break into the afternoon with a band of heavy and persistent rain arriving from the west later.
Chance of cloud-free hill tops
10% gradually rising to 70% by late afternoon.
Maximum wind speed expected
Southeasterly 50-55 mph.
Temperature
- At 800m Plus 4 Celsius rising to plus 11 Celsius.
- Valley Plus 12 Celsius rising to plus 20 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Cloud bases initially above 400-500m rising to 600-700m by afternoon, before gradually rising above summits. Moderate or good visibilities generally but poor or very poor in hill fog. Visibilities also expected to drop to poor in any outbreaks of light rain or drizzle.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 30 Sep
Overnight rain clearing around dawn to leave a bright and breezy day with sunny spells and a few showers. Fresh to strong southerly winds.
Thu 1 Oct
Another rather breezy day ahead with bright or sunny spells as well as scattered showers.
Fri 2 Oct
A more settled day ahead with winds easing and plenty of dry and bright weather on offer.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations