Mountain weather
Eryri / Snowdonia
Confidence
High confidence in the overall weather but precise shower detail and timing remains lower confidence.
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This eveningSunrise:Sunset:
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Thu 14 MaySunrise:Sunset:
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Fri 15 MaySunrise:Sunset:
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Further outlook
This evening forecast
Blustery showers continuing with brisk northwesterly winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Thunderstorms
Gales
Severe Chill Effect
Heavy Persistent Rain
Strong Sunlight
Mountain weather forecast
Another day of blustery heavy showers.
|
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 |
70%
|
70%
|
70%
|
70%
|
70%
|
70%
|
60%
|
30%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | NW 31mph knots
NW
31mph |
NW 30mph knots
NW
30mph |
NW 28mph knots
NW
28mph |
NW 23mph knots
NW
23mph |
N 23mph knots
N
23mph |
N 25mph knots
N
25mph |
N 29mph knots
N
29mph |
N 22mph knots
N
22mph |
|
600m
|
600m | NW 20mph knots
NW
20mph |
NW 20mph knots
NW
20mph |
NW 19mph knots
NW
19mph |
NW 18mph knots
NW
18mph |
N 18mph knots
N
18mph |
N 19mph knots
N
19mph |
N 20mph knots
N
20mph |
N 13mph knots
N
13mph |
|
300m
|
300m | NW 13mph knots
NW
13mph |
NW 13mph knots
NW
13mph |
NW 12mph knots
NW
12mph |
NW 12mph knots
NW
12mph |
N 13mph knots
N
13mph |
N 14mph knots
N
14mph |
N 14mph knots
N
14mph |
N 8mph knots
N
8mph |
|
Valley
|
Valley | NW 13mph knots
NW
13mph |
NW 13mph knots
NW
13mph |
NW 12mph knots
NW
12mph |
NW 12mph knots
NW
12mph |
N 13mph knots
N
13mph |
N 14mph knots
N
14mph |
N 14mph knots
N
14mph |
N 7mph knots
N
7mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 38mph | 36mph | 34mph | 30mph | 30mph | 32mph | 36mph | 28mph |
|
600m
|
600m | 26mph | 27mph | 24mph | 24mph | 25mph | 26mph | 27mph | 18mph |
|
300m
|
300m | 25mph | 25mph | 22mph | 21mph | 23mph | 24mph | 25mph | 17mph |
|
Valley
|
Valley | 25mph | 25mph | 21mph | 21mph | 23mph | 23mph | 25mph | 16mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 2 degrees Celsius 2°C | 1 degrees Celsius 1°C | 1 degrees Celsius 1°C | 1 degrees Celsius 1°C | 2 degrees Celsius 2°C | 3 degrees Celsius 3°C | 2 degrees Celsius 2°C | 2 degrees Celsius 2°C |
|
600m
|
600m | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 3 degrees Celsius 3°C | 3 degrees Celsius 3°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C |
|
300m
|
300m | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 6 degrees Celsius 6°C |
|
Valley
|
Valley | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
| Freezing Level | Freezing Level |
1100m
|
1000m
|
1000m
|
900m
|
1000m
|
1000m
|
1100m
|
1000m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | -6 degrees Celsius -6°C | -7 degrees Celsius -7°C | -6 degrees Celsius -6°C | -6 degrees Celsius -6°C | -5 degrees Celsius -5°C | -4 degrees Celsius -4°C | -5 degrees Celsius -5°C | -5 degrees Celsius -5°C |
|
600m
|
600m | -2 degrees Celsius -2°C | -2 degrees Celsius -2°C | -2 degrees Celsius -2°C | -2 degrees Celsius -2°C | 0 degrees Celsius 0°C | 1 degrees Celsius 1°C | 0 degrees Celsius 0°C | 0 degrees Celsius 0°C |
|
300m
|
300m | 2 degrees Celsius 2°C | 2 degrees Celsius 2°C | 2 degrees Celsius 2°C | 2 degrees Celsius 2°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C |
|
Valley
|
Valley | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 4 degrees Celsius 4°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C |
| Freezing Level | Freezing Level |
1100m
|
1000m
|
1000m
|
900m
|
1000m
|
1000m
|
1100m
|
1000m
|
Additional weather information
Meteorologist's view
Frequent and locally heavy showers will bring a very changeable day. Care needed if heading into the hills with temperatures feeling cold at height, some gusty winds and a risk of thunder. UV levels also remaining high in any brighter spells.
Weather
Scattered showers continuing on Thursday with heavy downpours at times, and perhaps hail. A small chance of thunderstorms during the afternoon and a few brighter spells. Showers easing into the night. Feeling cold with brisk winds continuing.
Chance of cloud-free hill tops
70% dropping in heavy downpours.
Low cloud and visibility
Cloud down to 600-800 m at times, lowering in any intense or persistent showers. Visibility will generally be very good, although falling rapidly within any heavy showers to become moderate to poor.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A few showers pushing south across the park during the morning. Turning drier and brighter into the afternoon with winds easing.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
Northwesterly 20-25mph gusting 30-35 mph.
Temperature
- At 800m Plus 2 Celsius rising to plus 5 Celsius.
- Valley Plus 6 Celsius rising to plus 10 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Patchy cloud shrouding the summits first thing, lifting above by the afternoon. Generally very good visibility but dropping to moderate in any cloud and showers.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sat 16 May
A cold start then largely dry with sunny intervals. Rain arriving by the evening. Moderate westerly winds.
Sun 17 May
Rain clearing the early hours then dry with sunshine. Moderate westerly winds.
Mon 18 May
Dry to start, chance of rain later. Temperatures closer to average.
Summit specific forecast
The Eryri (Snowdonia) mountains are made up of 90 mountain peaks including the tallest mountain in Wales, Yr Wyddfa (Snowdon), standing at 1,085 metres.