Mountain weather
Eryri / Snowdonia
Confidence
High for overall theme. Lower for confidence on cloud amounts and clearance of rain during Thursday morning.
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This eveningSunrise:Sunset:
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Thu 2 JulSunrise:Sunset:
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Fri 3 JulSunrise:Sunset:
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Further outlook
This evening forecast
Turning cloudier with rain and stronger winds.
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
Wet during the early hours, then bright skies.
|
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 |
80%
|
70%
|
70%
|
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 | SW 40mph knots
SW
40mph |
W 34mph knots
W
34mph |
NW 28mph knots
NW
28mph |
NW 22mph knots
NW
22mph |
NW 22mph knots
NW
22mph |
NW 20mph knots
NW
20mph |
W 18mph knots
W
18mph |
W 17mph knots
W
17mph |
|
600m
|
600m | SW 25mph knots
SW
25mph |
W 23mph knots
W
23mph |
NW 19mph knots
NW
19mph |
NW 18mph knots
NW
18mph |
NW 18mph knots
NW
18mph |
NW 16mph knots
NW
16mph |
W 14mph knots
W
14mph |
W 10mph knots
W
10mph |
|
300m
|
300m | SW 16mph knots
SW
16mph |
W 16mph knots
W
16mph |
NW 14mph knots
NW
14mph |
NW 14mph knots
NW
14mph |
NW 14mph knots
NW
14mph |
W 13mph knots
W
13mph |
W 9mph knots
W
9mph |
W 5mph knots
W
5mph |
|
Valley
|
Valley | SW 16mph knots
SW
16mph |
W 16mph knots
W
16mph |
NW 14mph knots
NW
14mph |
NW 14mph knots
NW
14mph |
NW 14mph knots
NW
14mph |
W 13mph knots
W
13mph |
W 10mph knots
W
10mph |
W 6mph knots
W
6mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 49mph | 42mph | 35mph | 29mph | 29mph | 27mph | 24mph | 20mph |
|
600m
|
600m | 33mph | 30mph | 25mph | 24mph | 24mph | 22mph | 19mph | 13mph |
|
300m
|
300m | 30mph | 28mph | 23mph | 22mph | 22mph | 20mph | 15mph | 12mph |
|
Valley
|
Valley | 30mph | 28mph | 23mph | 23mph | 22mph | 21mph | 16mph | 13mph |
|
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 | 9 degrees Celsius 9°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 13 degrees Celsius 13°C | 11 degrees Celsius 11°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°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 | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
3400m
|
2400m
|
2100m
|
2100m
|
1900m
|
1800m
|
2000m
|
1900m
|
|
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 | 4 degrees Celsius 4°C | 2 degrees Celsius 2°C | 2 degrees Celsius 2°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C |
|
600m
|
600m | 9 degrees Celsius 9°C | 7 degrees Celsius 7°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C |
|
300m
|
300m | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
3400m
|
2400m
|
2100m
|
2100m
|
1900m
|
1800m
|
2000m
|
1900m
|
Additional weather information
Meteorologist's view
Poor visibilities with hill fog requiring good navigational skills as well as brisk winds. Improving later with UV protection required.
Weather
Widespread low cloud and outbreaks of rain through the early hours. Skies brightening by late morning with sunny spells. Brisk northwesterly winds, these easing during the day.
Chance of cloud-free hill tops
10% during the morning, then 80%.
Low cloud and visibility
Low cloud and hill fog first thing as a front clears southwards. Cloud then above summits. Very poor visibility initially, then excellent.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A fresh start with any early mist and fog quickly lifting then a fine day with sunshine. Lighter winds than Thursday.
Chance of cloud-free hill tops
Over 90%.
Maximum wind speed expected
Westerly 10-25 mph.
Temperature
- At 800m Plus 14 Celsius to Plus 13 Celsius.
- Valley Plus 12 Celsius to Plus 19 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Some early fog, otherwise nil. Excellent visibilities.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sat 4 Jul
Low cloud and fog, breaking up to sunny spells. Mostly dry. Moderate westerly winds.
Sun 5 Jul
Early mist and fog clearing then plenty of sunshine. Moderate westerly winds. High UV levels.
Mon 6 Jul
Early mist and fog clearing then plenty of warm sunshine. Moderate westerly winds. High UV levels.
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.