Mountain weather
Eryri / Snowdonia
Confidence
High for a largely settled day, lower for shower details through the morning then rain details Thursday and Saturday.
-
Wed 9 SepSunrise:Sunset:
-
Thu 10 SepSunrise: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
Showers gradually fading with winds easing.
|
Time
|
Time |
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 |
40%
|
40%
|
30%
|
20%
|
10%
|
10%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | NW 23mph knots
NW
23mph |
NW 16mph knots
NW
16mph |
NW 15mph knots
NW
15mph |
W 11mph knots
W
11mph |
W 8mph knots
W
8mph |
SW 8mph knots
SW
8mph |
|
600m
|
600m | NW 14mph knots
NW
14mph |
NW 11mph knots
NW
11mph |
NW 12mph knots
NW
12mph |
W 10mph knots
W
10mph |
W 6mph knots
W
6mph |
S 8mph knots
S
8mph |
|
300m
|
300m | NW 9mph knots
NW
9mph |
NW 8mph knots
NW
8mph |
NW 9mph knots
NW
9mph |
W 8mph knots
W
8mph |
W 3mph knots
W
3mph |
S 4mph knots
S
4mph |
|
Valley
|
Valley | NW 9mph knots
NW
9mph |
NW 8mph knots
NW
8mph |
NW 9mph knots
NW
9mph |
W 8mph knots
W
8mph |
W 3mph knots
W
3mph |
S 4mph knots
S
4mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 26mph | 19mph | 19mph | 15mph | 10mph | 10mph |
|
600m
|
600m | 18mph | 14mph | 15mph | 13mph | 7mph | 11mph |
|
300m
|
300m | 17mph | 13mph | 14mph | 12mph | 7mph | 9mph |
|
Valley
|
Valley | 17mph | 13mph | 14mph | 12mph | 7mph | 9mph |
|
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 |
1800m
|
1700m
|
1700m
|
1700m
|
1400m
|
1600m
|
Additional weather information
Meteorologist's view
A good day to be in the national park with plenty of dry and bright weather around. Extra layers may be required at height as it will be feeling rather cold in the wind.
Weather
Apart from the odd light shower through the morning, it will be a largely dry and bright day. Still feeling on the cool side, but pleasant in any shelter and sunshine, especially later in the day.
Chance of cloud-free hill tops
70% rising to >95% through the morning.
Low cloud and visibility
Cloud may briefly lower to 800-900m during the passage of any showers during the first half of the day, otherwise generally above the summits. Visibilities generally very good, but falling to moderate in any showers and poor in any hill fog.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
A bright start but low cloud and outbreaks of rain will soon arrive from the west through the morning. This may turn heavy through the afternoon and into the evening. Moderate southwesterly winds.
Chance of cloud-free hill tops
90% dropping to 10% through the afternoon.
Maximum wind speed expected
Southwesterly 25-30 mph.
Temperature
- At 800m Plus 5 Celsius rising to plus 8 Celsius.
- Valley Plus 12 Celsius rising to plus 16 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Cloud bases initially above summits but dropping to bases between 500-600m through the afternoon with patchy areas of cloud with bases between 300-400m. Visibilities initially very good but becoming poor or very poor in hill fog later and may widely dip to moderate or poor in persistent rain through the afternoon.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Fri 11 Sep
A drier and brighter day with any early morning cloud quickly lifting and breaking, to leave lengthy sunny spells by afternoon.
Sat 12 Sep
Dry and bright initially with some low cloud and rain arriving from the northwest later.
Sun 13 Sep
Some low cloud and the odd shower possibly at first but this is expected to clear away leaving a dry and brighter afternoon with lengthy sunny spells.
Mountain weather information
Fri 11 Sep
A drier and brighter day with any early morning cloud quickly lifting and breaking, to leave lengthy sunny spells by afternoon.
Sat 12 Sep
Dry and bright initially with some low cloud and rain arriving from the northwest later.
Sun 13 Sep
Some low cloud and the odd shower possibly at first but this is expected to clear away leaving a dry and brighter afternoon with lengthy sunny spells.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations