Mountain weather
Eryri / Snowdonia
Confidence
High for largely settled and warming trend during the next few days. Moderate for extent of low cloud.
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This eveningSunrise:Sunset:
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Mon 6 JulSunrise:Sunset:
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Tue 7 JulSunrise:Sunset:
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Further outlook
This evening forecast
Dry with variable cloud and bright or sunny spells this evening. Low cloud and hill fog reforming after dusk. Windy, locally gusty on the summit.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Poor Visibility
Mountain weather forecast
Early low cloud and hill fog gradually lifting, although may linger on the summit. Largely dry with warm sunny spells developing.
|
Time
|
Time |
00:00
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03:00
|
06:00
|
09:00
|
12:00
|
15:00
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18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
20%
|
30%
|
40%
|
30%
|
10%
|
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 24mph knots
SW
24mph |
SW 22mph knots
SW
22mph |
SW 20mph knots
SW
20mph |
SW 19mph knots
SW
19mph |
SW 20mph knots
SW
20mph |
SW 18mph knots
SW
18mph |
SW 19mph knots
SW
19mph |
SW 20mph knots
SW
20mph |
|
600m
|
600m | S 21mph knots
S
21mph |
SW 19mph knots
SW
19mph |
SW 18mph knots
SW
18mph |
SW 19mph knots
SW
19mph |
SW 19mph knots
SW
19mph |
SW 19mph knots
SW
19mph |
S 18mph knots
S
18mph |
S 17mph knots
S
17mph |
|
300m
|
300m | S 12mph knots
S
12mph |
S 9mph knots
S
9mph |
S 8mph knots
S
8mph |
SW 11mph knots
SW
11mph |
SW 12mph knots
SW
12mph |
SW 12mph knots
SW
12mph |
S 11mph knots
S
11mph |
S 10mph knots
S
10mph |
|
Valley
|
Valley | S 12mph knots
S
12mph |
SW 9mph knots
SW
9mph |
SW 8mph knots
SW
8mph |
SW 11mph knots
SW
11mph |
SW 11mph knots
SW
11mph |
SW 12mph knots
SW
12mph |
S 11mph knots
S
11mph |
S 10mph knots
S
10mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 29mph | 26mph | 24mph | 24mph | 27mph | 25mph | 25mph | 25mph |
|
600m
|
600m | 27mph | 24mph | 23mph | 25mph | 27mph | 26mph | 24mph | 22mph |
|
300m
|
300m | 21mph | 17mph | 15mph | 17mph | 19mph | 19mph | 18mph | 17mph |
|
Valley
|
Valley | 21mph | 17mph | 15mph | 17mph | 17mph | 18mph | 17mph | 17mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C |
|
600m
|
600m | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 17 degrees Celsius 17°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 16 degrees Celsius 16°C |
| Freezing Level | Freezing Level |
2800m
|
2800m
|
2700m
|
2700m
|
2700m
|
2700m
|
2900m
|
3100m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 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 | 8 degrees Celsius 8°C |
|
600m
|
600m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
|
300m
|
300m | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°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 |
2800m
|
2800m
|
2700m
|
2700m
|
2700m
|
2700m
|
2900m
|
3100m
|
Additional weather information
Meteorologist's view
UV levels will reach moderate to high levels by lunchtime, even where cloud remains, so sun protection is advised for those spending any length of time outdoors.
Weather
Early low cloud and hill fog clearing quicker than on Sunday leading to a largely bright or sunny day across the park. However, Yr Wyddfa/Snowdon Summit may continue to see some thicker cloud linger throughout the day, which may be thick enough to produce some patchy light rain and drizzle at times. In the strong July sunshine it will be feeling very warm, especially in the valleys and low-levels.
Chance of cloud-free hill tops
40% rising to 80% after dawn.
Low cloud and visibility
Early low cloud, bases down to 300-400m, and hill fog quickly clearing after dawn to leave only some fair weather cloud which will generally be above the peaks. Very poor in low cloud and fog at first, becoming very good or excellent by mid-morning.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Low cloud and hill fog is likely to reform overnight, before gradually lifting and clearing shortly after dawn on Tuesday. Otherwise, dry with lengthy spells of strong July sunshine. Feeling warm in the valleys and low-lying areas of the Park. Dry with clear skies after dusk.
Chance of cloud-free hill tops
40% rising to 90% after dawn.
Maximum wind speed expected
West north-westerly 15-20mph.
Temperature
- At 800m Plus 8 Celsius, becoming Plus 14 Celsius.
- Valley Plus 9 Celsius, becoming Plus 20 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Early low cloud, bases down to 300-400m, and hill fog quickly clearing after dawn to leave only some fair weather cloud which will generally be above the peaks. Very poor in low cloud and fog at first, becoming very good or excellent by mid-morning.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 8 Jul
Staying dry and sunny with very little cloud expected. High UV levels and feeling very warm.
Thu 9 Jul
Little change with the warm and settled spell continuing. Some fair weather cloud around but tending to be above the summits for the majority of the time. Feeling very warm.
Fri 10 Jul
Dry with little cloud and prolonged sunny spells. Feeling very warm.
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.