Mountain weather
Eryri / Snowdonia
Confidence
High for overall settled start then becoming more unsettled. Lower confidence for amount of rainfall and timings in the week.
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This eveningSunrise:Sunset:
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Mon 15 JunSunrise:Sunset:
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Tue 16 JunSunrise:Sunset:
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Further outlook
This evening forecast
Fine and dry with late sunshine.
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
A bright start, cloud increasing and turning murky by the evening.
|
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 |
10%
|
10%
|
20%
|
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 | E 21mph knots
E
21mph |
SE 17mph knots
SE
17mph |
SE 14mph knots
SE
14mph |
SE 16mph knots
SE
16mph |
SE 16mph knots
SE
16mph |
S 18mph knots
S
18mph |
SW 15mph knots
SW
15mph |
S 21mph knots
S
21mph |
|
600m
|
600m | SE 16mph knots
SE
16mph |
SE 15mph knots
SE
15mph |
SE 13mph knots
SE
13mph |
SE 14mph knots
SE
14mph |
SE 12mph knots
SE
12mph |
S 13mph knots
S
13mph |
SW 13mph knots
SW
13mph |
S 15mph knots
S
15mph |
|
300m
|
300m | SE 12mph knots
SE
12mph |
SE 12mph knots
SE
12mph |
SE 12mph knots
SE
12mph |
SE 12mph knots
SE
12mph |
SE 10mph knots
SE
10mph |
S 9mph knots
S
9mph |
SW 7mph knots
SW
7mph |
S 9mph knots
S
9mph |
|
Valley
|
Valley | SE 12mph knots
SE
12mph |
SE 13mph knots
SE
13mph |
SE 12mph knots
SE
12mph |
SE 12mph knots
SE
12mph |
SE 10mph knots
SE
10mph |
S 9mph knots
S
9mph |
SW 7mph knots
SW
7mph |
S 9mph knots
S
9mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 29mph | 24mph | 19mph | 20mph | 20mph | 23mph | 19mph | 25mph |
|
600m
|
600m | 25mph | 23mph | 19mph | 19mph | 17mph | 18mph | 17mph | 19mph |
|
300m
|
300m | 25mph | 23mph | 21mph | 18mph | 16mph | 16mph | 12mph | 17mph |
|
Valley
|
Valley | 24mph | 24mph | 21mph | 18mph | 16mph | 15mph | 11mph | 15mph |
|
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 | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C |
|
600m
|
600m | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 16 degrees Celsius 16°C | 13 degrees Celsius 13°C |
|
Valley
|
Valley | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 18 degrees Celsius 18°C | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 17 degrees Celsius 17°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2700m
|
3000m
|
3100m
|
3100m
|
3100m
|
2600m
|
2700m
|
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 | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 9 degrees Celsius 9°C | 6 degrees Celsius 6°C |
|
600m
|
600m | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 11 degrees Celsius 11°C | 9 degrees Celsius 9°C |
|
300m
|
300m | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 15 degrees Celsius 15°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 16 degrees Celsius 16°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 16 degrees Celsius 16°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
2700m
|
3000m
|
3100m
|
3100m
|
3100m
|
2600m
|
2700m
|
2900m
|
Additional weather information
Meteorologist's view
Best of the sunshine early on with UV protection required despite cloud building. Poor visibilities later in the day with good navigational skills needed.
Weather
A bright start with the odd spot of rain early on, this clearing by late morning. Low cloud increasing from the west with hill fog by the late evening. Patchy rain and drizzle by the evening.
Chance of cloud-free hill tops
70% lowering down to 40% by the evening in the west of the park.
Low cloud and visibility
Patches of cloud around 600m to the east of the park, lifting early in the morning, clearer skies in the west. Low cloud then building in from the west, becoming more widespread down to around 400m. Generally good visibilities then dropping to very poor in low cloud and hill fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A few bright spells to start, low cloud and hill fog soon developing from the southwest with outbreaks of rain arriving through the afternoon. Breeze picking up.
Chance of cloud-free hill tops
40% lowering to 20% by the evening.
Maximum wind speed expected
Southwesterly 30-55 mph gusting up to 40 mph.
Temperature
- At 800m Plus 9 Celsius rising plus 12 Celsius.
- Valley Plus 13 Celsius rising to plus 15 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Patchy cloud around 300m to start, breaking and lifting mostly above summits, best of the breaks to the northeast of the park. Widespread low cloud moving in with bases down to 200m. Generally moderate to very poor visibilities.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 17 Jun
A damp day with outbreaks of rain and drizzle and widespread low cloud. Moderate southwesterly winds.
Thu 18 Jun
Dull start with low cloud, breaking up to sunny spells. Mostly dry with light southerly winds.
Fri 19 Jun
Another cloudy day with outbreaks of rain, drier to the east of the park.
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.