Mountain weather
Eryri / Snowdonia
Confidence
High for largely settled and warming trend during the next few days. Moderate for cloud amounts especially during Sunday.
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This eveningSunrise:Sunset:
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Sun 5 JulSunrise:Sunset:
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Mon 6 JulSunrise:Sunset:
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Further outlook
This evening forecast
A rather cloudy evening with some spots of light rain and drizzle, although southeastern areas of the park may continue to see some spells of sunshine before dusk. Cloud tending to lower as the evening progresses giving an increasing risk of hill fog.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Strong Sunlight
Mountain weather forecast
A cloudy start to Sunday with extensive low cloud and hill fog, especially across the north and west of the park. The cloud will produce some light rain and drizzle at times, especially before dawn. The cloud will gradually lift and break throughout the morning giving a brighter afternoon before the low cloud possibly becomes more extensive again after dusk.
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Time
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Time |
00:00
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03:00
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06:00
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09:00
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12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
30%
|
40%
|
30%
|
10%
|
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 | W 22mph knots
W
22mph |
W 22mph knots
W
22mph |
W 16mph knots
W
16mph |
W 15mph knots
W
15mph |
W 18mph knots
W
18mph |
SW 19mph knots
SW
19mph |
SW 20mph knots
SW
20mph |
SW 18mph knots
SW
18mph |
|
600m
|
600m | W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
W 11mph knots
W
11mph |
W 11mph knots
W
11mph |
SW 16mph knots
SW
16mph |
SW 18mph knots
SW
18mph |
SW 20mph knots
SW
20mph |
SW 17mph knots
SW
17mph |
|
300m
|
300m | W 8mph knots
W
8mph |
W 9mph knots
W
9mph |
W 7mph knots
W
7mph |
W 8mph knots
W
8mph |
SW 10mph knots
SW
10mph |
SW 11mph knots
SW
11mph |
SW 12mph knots
SW
12mph |
S 10mph knots
S
10mph |
|
Valley
|
Valley | W 8mph knots
W
8mph |
W 9mph knots
W
9mph |
W 7mph knots
W
7mph |
SW 8mph knots
SW
8mph |
W 10mph knots
W
10mph |
SW 11mph knots
SW
11mph |
SW 12mph knots
SW
12mph |
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 | 27mph | 27mph | 20mph | 20mph | 24mph | 26mph | 26mph | 24mph |
|
600m
|
600m | 18mph | 18mph | 15mph | 16mph | 22mph | 25mph | 27mph | 23mph |
|
300m
|
300m | 16mph | 16mph | 12mph | 12mph | 16mph | 18mph | 20mph | 18mph |
|
Valley
|
Valley | 17mph | 16mph | 12mph | 13mph | 16mph | 18mph | 19mph | 17mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C |
|
600m
|
600m | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
|
300m
|
300m | 14 degrees Celsius 14°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 | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C |
|
Valley
|
Valley | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 15 degrees Celsius 15°C |
| Freezing Level | Freezing Level |
3100m
|
3300m
|
3200m
|
2800m
|
2900m
|
2900m
|
2900m
|
2900m
|
|
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 | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C |
|
300m
|
300m | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
3100m
|
3300m
|
3200m
|
2800m
|
2900m
|
2900m
|
2900m
|
2900m
|
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 time outdoors.
Weather
A cloudy start to Sunday with extensive low cloud and hill fog, especially across the north and west of the park. The cloud will produce some light rain and drizzle at times, especially before dawn. The cloud will gradually lift and break throughout the morning giving a brighter afternoon with the best of the sunshine towards the southeast of the park. During the evening low cloud possibly becomes more extensive again after dusk.
Chance of cloud-free hill tops
30% rising to 70% throughout the morning.
Low cloud and visibility
Extensive low cloud and hill fog throughout the early morning, with cloud bases falling to around 400-500m at times. Cloud expected to lift and break up through the morning, although cloud may continue to cover Yr Wyddfa/Snowdon Summit at times throughout the afternoon. Low cloud is then likely to gradually become more extensive again after dusk. Very good visibilities expected after dawn away from any lingering low cloud.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
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 hug the summit throughout the day. In the strong July sunshine it will be feeling warm, especially at lower levels.
Chance of cloud-free hill tops
40% rising to 80% after dawn.
Maximum wind speed expected
Southwesterly 20-25mph with gusts up to 30mph.
Temperature
- At 800m Plus 09 Celsius rising to Plus 15 Celsius.
- Valley Plus 13 Celsius rising to Plus 19 Celsius.
- Freezing level Way above the summits.
Low cloud and visibility
Early low cloud and hill fog quickly clearing after dawn to leave only some fair weather cloud which will generally be above the peaks. Excellent visibilities once the morning low cloud and hill fog clears.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Tue 7 Jul
Another similar day to Monday with any early low cloud which has formed overnight quickly clearing much of the park to leave a sunny and very warm day. Yr Wyddfa/Snowdon Summit may again continue to see some cloud throughout the day. UV levels high once again.
Wed 8 Jul
Staying dry and sunny with very little cloud expected. High UV levels and feeling very warm.
Thu 9 Jul
Little changes 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.
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.