Mountain weather
Eryri / Snowdonia
Confidence
High for largely settled conditions Friday and through much of Saturday and again for settled conditions next week, but lower through Saturday evening and Sunday due to uncertainties over the arrival and clearance of a slow moving, but weakening, front edging southeast across the area.
-
Fri 30 OctSunrise:Sunset:
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Sat 31 OctSunrise:Sunset:
-
Further outlook
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Mountain weather forecast
Dry with long sunny spells. Strong southerly winds through the morning.
|
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 |
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 | S 32mph knots
S
32mph |
S 30mph knots
S
30mph |
S 24mph knots
S
24mph |
S 18mph knots
S
18mph |
SE 16mph knots
SE
16mph |
SE 15mph knots
SE
15mph |
|
600m
|
600m | S 20mph knots
S
20mph |
S 19mph knots
S
19mph |
S 18mph knots
S
18mph |
S 11mph knots
S
11mph |
SE 9mph knots
SE
9mph |
SE 8mph knots
SE
8mph |
|
300m
|
300m | SE 12mph knots
SE
12mph |
SE 11mph knots
SE
11mph |
S 9mph knots
S
9mph |
SE 5mph knots
SE
5mph |
SE 5mph knots
SE
5mph |
SE 6mph knots
SE
6mph |
|
Valley
|
Valley | SE 12mph knots
SE
12mph |
SE 11mph knots
SE
11mph |
S 9mph knots
S
9mph |
SE 6mph knots
SE
6mph |
SE 6mph knots
SE
6mph |
SE 6mph knots
SE
6mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 39mph | 37mph | 29mph | 21mph | 19mph | 19mph |
|
600m
|
600m | 29mph | 28mph | 24mph | 15mph | 14mph | 15mph |
|
300m
|
300m | 25mph | 22mph | 18mph | 11mph | 11mph | 11mph |
|
Valley
|
Valley | 25mph | 23mph | 18mph | 11mph | 11mph | 11mph |
|
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
|
2200m
|
2200m
|
2100m
|
2000m
|
2000m
|
Additional weather information
Meteorologist's view
Rather cold on the summits, especially through the morning, with gusts around 45mph over ridges and summits at first.
Weather
A dry start with some patchy cloud in the east but clear elsewhere. A fine day follows with some long spells of sunshine. Remaining dry through the evening with long clear spells, and perhaps some low level mist and fog patches developing later.
Chance of cloud-free hill tops
40% in the east initially, improving through the day and close to 100% elsewhere
Low cloud and visibility
Scattered cloud around 500m in the east lifting and clearing through the morning, little or no cloud expected elsewhere below summit levels. Otherwise visibility good or very good, falling to poor in any evening low level mist and fog patches.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Weather
Clear spells overnight with some low level mist and fog patches likely to develop. Overnight low level mist and fog clearing through the morning, but generally a fine day on the mountains with some long sunny spells, although perhaps a little hazy at times due to high cloud, especially through the afternoon. Cloud, above the summits, thickens through the late evening.
Chance of cloud-free hill tops
Close to 100%.
Maximum wind speed expected
Southerly or southeasterly 10-15mph.
Temperature
- At 800m Around 6 or 7 Celsius
- Valley Around 4 or 5 Celsius at dawn rising to plus 13 or 14 by day
- Freezing level Above the summits
Low cloud and visibility
Risk of some thin cloud over foothills as low level mist and fog lifts, otherwise little or no cloud below the summits expected. Otherwise, visibility very good, but poor in any low level mist and fog patches.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 1 Nov
Cloudy with a little rain around, perhaps some late bright or sunny spells developing. Mainly light winds turning northeasterly. Freezing level above summits.
Mon 2 Nov
Lingering low level mist and fog patches, but largely sunny on the mountains. Freshening easterly or northeasterly winds. Freezing level above the summits.
Tue 3 Nov
Risk of low level mist and fog, but mountains remaining dry and with some long sunny spells. Occasionally fresh easterly or northeasterly winds. Freezing level above summits, perhaps a touch of low level frost.
Mountain weather information
Sun 1 Nov
Cloudy with a little rain around, perhaps some late bright or sunny spells developing. Mainly light winds turning northeasterly. Freezing level above summits.
Mon 2 Nov
Lingering low level mist and fog patches, but largely sunny on the mountains. Freshening easterly or northeasterly winds. Freezing level above the summits.
Tue 3 Nov
Risk of low level mist and fog, but mountains remaining dry and with some long sunny spells. Occasionally fresh easterly or northeasterly winds. Freezing level above summits, perhaps a touch of low level frost.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations