Mountain weather
Eryri / Snowdonia
Confidence
High for the unsettled weather. Lower for details of cloud and rain or shower distribution throughout
-
Mon 31 AugSunrise:Sunset:
-
Tue 1 SepSunrise:Sunset:
-
Further outlook
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 and showery start to the day, improving into the afternoon. Feeling cool.
|
Time
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Time |
06:00
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09:00
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12:00
|
15:00
|
18:00
|
21:00
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|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
|
Weather symbols | ||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
70%
|
60%
|
40%
|
20%
|
20%
|
20%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | NW 27mph knots
NW
27mph |
NW 24mph knots
NW
24mph |
W 23mph knots
W
23mph |
W 22mph knots
W
22mph |
W 20mph knots
W
20mph |
W 18mph knots
W
18mph |
|
600m
|
600m | NW 20mph knots
NW
20mph |
NW 17mph knots
NW
17mph |
NW 16mph knots
NW
16mph |
W 17mph knots
W
17mph |
W 12mph knots
W
12mph |
SW 10mph knots
SW
10mph |
|
300m
|
300m | NW 14mph knots
NW
14mph |
NW 13mph knots
NW
13mph |
NW 13mph knots
NW
13mph |
W 13mph knots
W
13mph |
W 8mph knots
W
8mph |
SW 6mph knots
SW
6mph |
|
Valley
|
Valley | NW 14mph knots
NW
14mph |
NW 13mph knots
NW
13mph |
NW 13mph knots
NW
13mph |
W 13mph knots
W
13mph |
W 8mph knots
W
8mph |
SW 6mph knots
SW
6mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 32mph | 30mph | 29mph | 28mph | 25mph | 23mph |
|
600m
|
600m | 25mph | 23mph | 21mph | 22mph | 16mph | 15mph |
|
300m
|
300m | 23mph | 22mph | 21mph | 21mph | 15mph | 14mph |
|
Valley
|
Valley | 24mph | 22mph | 21mph | 21mph | 15mph | 14mph |
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 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 | 11 degrees Celsius 11°C |
|
300m
|
300m | 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 |
|
Valley
|
Valley | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2400m
|
2400m
|
2300m
|
1900m
|
1900m
|
2300m
|
|
Time
|
Time |
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 | 4 degrees Celsius 4°C | 4 degrees Celsius 4°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 |
|
300m
|
300m | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
2400m
|
2400m
|
2300m
|
1900m
|
1900m
|
2300m
|
Additional weather information
Meteorologist's view
The brisk westerly wind and frequent showers initially will made it feel rather chilly, so extra layers and adequate waterproofs will needed. The sun still remains strong at this time of year, so protection may be needed during the sunnier moments.
Weather
Extensive low cloud with moderate, occasionally heavy rain showers through the morning. Showers will ease through the late morning and cloud will lift and break at times to leave a drier and brighter afternoon, although a few showers remain possible.
Chance of cloud-free hill tops
20% rising to 80% during the afternoon.
Low cloud and visibility
Frequent cloud will obscure hills, with bases down to around 300m at times, particularly during any heavy showers. This largely during the morning, with cloud largely lifting above the summits during the afternoon. Visibility will be very good to excellent, but falling to moderate or poor in the passing of showers and very poor in any hill fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A bright day, with sunny spells and a scattering of showers. Cloud thickening late in the day, with rain likely overnight into Wednesday.
Chance of cloud-free hill tops
70% throughout.
Maximum wind speed expected
South-westerly 15-20 mph gusting 25-30 mph.
Temperature
- At 800m Plus 5 Celsius, rising to plus 8 Celsius.
- Valley Plus 9 Celsius rising to plus 20 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Occasional cloud bases down to around 500m at times during any showers. Visibility will be very good to excellent, but falling to moderate or poor in the passing of showers and very poor in any hill fog.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 2 Sep
Generally cloudy with rain, which could be heavy and persistent at times. Brisk south-westerly winds.
Thu 3 Sep
Occasional bright or sunny spells, although the risk of an isolated shower remains. Brisk south-westerly winds.
Fri 4 Sep
Most likely cloudy with the risk of some showery rain at times. Moderate south-westerly winds.
Mountain weather information
Wed 2 Sep
Generally cloudy with rain, which could be heavy and persistent at times. Brisk south-westerly winds.
Thu 3 Sep
Occasional bright or sunny spells, although the risk of an isolated shower remains. Brisk south-westerly winds.
Fri 4 Sep
Most likely cloudy with the risk of some showery rain at times. Moderate south-westerly winds.
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.