Mountain weather
Eryri / Snowdonia
Confidence
High confidence for the unsettled spell continuing, but lower for cloud and precipitation detail. Low for strength of winds on Friday night and Saturday.
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This eveningSunrise:Sunset:
-
Thu 4 JunSunrise:Sunset:
-
Fri 5 JunSunrise:Sunset:
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Further outlook
This evening forecast
Windy with heavy showers at times this evening.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Heavy Persistent Rain
Strong Sunlight
Gales
Severe Chill Effect
Poor Visibility
Thunderstorms
Mountain weather forecast
Cool and windy with heavy showers or longer spells of rain.
|
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 |
80%
|
≥95%
|
90%
|
80%
|
80%
|
80%
|
60%
|
50%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | SW 40mph knots
SW
40mph |
SW 37mph knots
SW
37mph |
W 31mph knots
W
31mph |
W 31mph knots
W
31mph |
W 32mph knots
W
32mph |
W 35mph knots
W
35mph |
W 36mph knots
W
36mph |
W 32mph knots
W
32mph |
|
600m
|
600m | SW 28mph knots
SW
28mph |
SW 25mph knots
SW
25mph |
W 21mph knots
W
21mph |
W 22mph knots
W
22mph |
W 23mph knots
W
23mph |
W 25mph knots
W
25mph |
W 24mph knots
W
24mph |
W 21mph knots
W
21mph |
|
300m
|
300m | SW 18mph knots
SW
18mph |
SW 16mph knots
SW
16mph |
W 15mph knots
W
15mph |
W 16mph knots
W
16mph |
W 17mph knots
W
17mph |
W 18mph knots
W
18mph |
W 17mph knots
W
17mph |
W 15mph knots
W
15mph |
|
Valley
|
Valley | SW 17mph knots
SW
17mph |
SW 16mph knots
SW
16mph |
W 15mph knots
W
15mph |
W 16mph knots
W
16mph |
W 17mph knots
W
17mph |
W 18mph knots
W
18mph |
W 17mph knots
W
17mph |
W 15mph knots
W
15mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 49mph | 46mph | 39mph | 40mph | 42mph | 45mph | 46mph | 41mph |
|
600m
|
600m | 37mph | 33mph | 28mph | 30mph | 32mph | 34mph | 33mph | 29mph |
|
300m
|
300m | 33mph | 30mph | 26mph | 28mph | 29mph | 31mph | 30mph | 27mph |
|
Valley
|
Valley | 31mph | 29mph | 26mph | 27mph | 28mph | 31mph | 30mph | 27mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C |
|
600m
|
600m | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 7 degrees Celsius 7°C |
|
300m
|
300m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
|
Valley
|
Valley | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 11 degrees Celsius 11°C |
| Freezing Level | Freezing Level |
2000m
|
2000m
|
1800m
|
1800m
|
1900m
|
1900m
|
1900m
|
1700m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 0 degrees Celsius 0°C | 0 degrees Celsius 0°C | 0 degrees Celsius 0°C | 0 degrees Celsius 0°C | 1 degrees Celsius 1°C | 1 degrees Celsius 1°C | 0 degrees Celsius 0°C | -1 degrees Celsius -1°C |
|
600m
|
600m | 4 degrees Celsius 4°C | 4 degrees Celsius 4°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 | 3 degrees Celsius 3°C |
|
300m
|
300m | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C |
|
Valley
|
Valley | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 8 degrees Celsius 8°C |
| Freezing Level | Freezing Level |
2000m
|
2000m
|
1800m
|
1800m
|
1900m
|
1900m
|
1900m
|
1700m
|
Additional weather information
Meteorologist's view
Feeling rather cold for June on the summits with the combination of strong winds and wet weather potentially creating a notably chilly feel without the appropriate clothing. Extra layers and waterproofs are highly recommended. Rock surfaces will be wet and slippery so extra care is advised on exposed ridges with water pooling and running across many paths. Winds will be locally 10-15 mph stronger than those in the table above on the highest summits during the heavy showers.
Weather
Heavy showers or longer spells of rain for much of the day with brief drier and brighter interludes and occasional bursts of sunshine. A small chance of an isolated rumble of thunder, most likely early afternoon. Showers easing a little by the evening. Feeling rather cold on the summits with strong to gale force winds.
Chance of cloud-free hill tops
30% becoming 60% through the afternoon.
Low cloud and visibility
Periods of cloud above 400-600m through the morning, lifting and breaking to give patches above 700m during the afternoon. Visibility moderate to very poor at first in low cloud and in heavy rain, but becoming occasionally very good in between the showers and outside of the hill fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A much drier day with occasional sunny spells, although a few showers remain likely, perhaps locally on the heavy side.
Chance of cloud-free hill tops
80%.
Maximum wind speed expected
Westerly 25-35 mph occasionally gusting 40-45 mph.
Temperature
- At 800m Plus 5 Celsius rising to plus 10 Celsius.
- Valley Plus 8 Celsius rising to plus 15 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Patchy cloud above 800m is possible in association with showers, but most summits will be cloud free for long durations. Very good visibility but locally poor in hill fog and moderate in showers.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sat 6 Jun
Considerable uncertainty in the details. Potentially very windy with gales for a time and rain at times.
Sun 7 Jun
Most likely staying unsettled with strong southwesterly winds and perhaps summit gales. Often cloudy with hill fog and periods of rain, perhaps heavy and persistent at times.
Mon 8 Jun
A drier day is probable with lighter winds and occasional bright or sunny spells.
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.