Mountain weather
Eryri / Snowdonia
Confidence
High for a generally unsettled period with rain at times. Moderate for exact timing of sunnier intervals.
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This eveningSunrise:Sunset:
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Wed 17 JunSunrise:Sunset:
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Thu 18 JunSunrise:Sunset:
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Further outlook
This evening forecast
Damp throughout Tuesday evening with outbreaks of rain and drizzle. Misty on the hills with cloud shrouding the peaks.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Strong Sunlight
Heavy Persistent Rain
Mountain weather forecast
Morning rain clearing to sunny spells later.
|
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%
|
80%
|
70%
|
60%
|
40%
|
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 | SW 29mph knots
SW
29mph |
SW 31mph knots
SW
31mph |
SW 27mph knots
SW
27mph |
SW 23mph knots
SW
23mph |
SW 21mph knots
SW
21mph |
SW 22mph knots
SW
22mph |
SW 25mph knots
SW
25mph |
SW 27mph knots
SW
27mph |
|
600m
|
600m | S 20mph knots
S
20mph |
SW 21mph knots
SW
21mph |
SW 19mph knots
SW
19mph |
SW 18mph knots
SW
18mph |
SW 18mph knots
SW
18mph |
SW 19mph knots
SW
19mph |
SW 19mph knots
SW
19mph |
S 18mph knots
S
18mph |
|
300m
|
300m | S 13mph knots
S
13mph |
SW 12mph knots
SW
12mph |
SW 11mph knots
SW
11mph |
SW 12mph knots
SW
12mph |
SW 13mph knots
SW
13mph |
SW 13mph knots
SW
13mph |
SW 13mph knots
SW
13mph |
S 12mph knots
S
12mph |
|
Valley
|
Valley | S 12mph knots
S
12mph |
SW 12mph knots
SW
12mph |
SW 11mph knots
SW
11mph |
SW 11mph knots
SW
11mph |
SW 12mph knots
SW
12mph |
SW 13mph knots
SW
13mph |
SW 13mph knots
SW
13mph |
S 12mph knots
S
12mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 36mph | 38mph | 34mph | 30mph | 28mph | 29mph | 33mph | 34mph |
|
600m
|
600m | 26mph | 27mph | 25mph | 25mph | 24mph | 26mph | 26mph | 25mph |
|
300m
|
300m | 22mph | 23mph | 20mph | 20mph | 20mph | 22mph | 22mph | 22mph |
|
Valley
|
Valley | 21mph | 22mph | 19mph | 19mph | 20mph | 21mph | 22mph | 22mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C |
|
600m
|
600m | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
3400m
|
3300m
|
3300m
|
3200m
|
2800m
|
2400m
|
2300m
|
2300m
|
|
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 | 6 degrees Celsius 6°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C |
|
600m
|
600m | 9 degrees Celsius 9°C | 8 degrees Celsius 8°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 |
|
300m
|
300m | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
| Freezing Level | Freezing Level |
3400m
|
3300m
|
3300m
|
3200m
|
2800m
|
2400m
|
2300m
|
2300m
|
Additional weather information
Meteorologist's view
The best views will be visible in the afternoon, but remember UV levels will be high when the sunshine emerges.
Weather
A wet start to the day with hill fog and spells of rain, turning heavy and persistent at times. Rain easing into the afternoon as cloud lifts and breaks, allowing sunny intervals to develop. Low cloud and mist returning to hills in the evening.
Chance of cloud-free hill tops
20% to begin, rising to 70% in the afternoon. Dropping to 40% during the evening.
Low cloud and visibility
Cloud widely at 200-300m to start the day, then lifting to 800-1000m for the afternoon. Patches of cloud at 400m developing on western-facing slopes in the evening. Very poor visibility in rain and hill fog, becoming moderate to good as cloud lifts.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Cloud largely becoming more persistent on Thursday with hill fog possible for much of the day. Spells of rain and drizzle developing at times, primarily in the afternoon.
Chance of cloud-free hill tops
Largely 30%.
Maximum wind speed expected
40mph, periodically gusting 50mph, southerly winds on the hills.
Temperature
- At 800m 7 Celsius, rising to plus 12 Celsius.
- Valley 12 Celsius, rising to plus 18 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Cloud sat at 300-400m for much of the day, shrouding many hills in fog. Visibility mostly poor on the hills, dropping to very poor in any rain.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Fri 19 Jun
Most likely another dull day with low cloud, hill fog and periods of rain, though some drier moments possible. Strong southwesterly winds on the hills.
Sat 20 Jun
A drier day is looking possible with sunny spells developing after early low cloud lifts and clears. A moderate westerly breeze.
Sun 21 Jun
Mostly dry, though any sunshine potentially being hazy due to variable amounts of high-based cloud. Calm and variable winds. Freezing levels remaining above the summits.
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.