Mountain weather
Eryri / Snowdonia
Confidence
High for mainly dry, increasingly hot and humid conditions.
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This eveningSunrise:Sunset:
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Tue 23 JunSunrise:Sunset:
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Wed 24 JunSunrise:Sunset:
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Further outlook
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Mountain weather forecast
Very hot and humid with strong sunshine.
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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 |
<5%
|
10%
|
10%
|
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 | S 19mph knots
S
19mph |
SE 19mph knots
SE
19mph |
SE 15mph knots
SE
15mph |
SW 11mph knots
SW
11mph |
SW 11mph knots
SW
11mph |
W 10mph knots
W
10mph |
NW 7mph knots
NW
7mph |
N 7mph knots
N
7mph |
|
600m
|
600m | S 13mph knots
S
13mph |
S 13mph knots
S
13mph |
S 11mph knots
S
11mph |
S 11mph knots
S
11mph |
SW 11mph knots
SW
11mph |
W 9mph knots
W
9mph |
NW 6mph knots
NW
6mph |
N 4mph knots
N
4mph |
|
300m
|
300m | SE 7mph knots
SE
7mph |
SE 6mph knots
SE
6mph |
SE 6mph knots
SE
6mph |
SW 6mph knots
SW
6mph |
SW 7mph knots
SW
7mph |
NW 7mph knots
NW
7mph |
NW 4mph knots
NW
4mph |
N 2mph knots
N
2mph |
|
Valley
|
Valley | SE 7mph knots
SE
7mph |
SE 7mph knots
SE
7mph |
S 6mph knots
S
6mph |
SW 6mph knots
SW
6mph |
SW 7mph knots
SW
7mph |
NW 7mph knots
NW
7mph |
NW 4mph knots
NW
4mph |
S 2mph knots
S
2mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 21mph | 22mph | 17mph | 14mph | 14mph | 14mph | 10mph | 8mph |
|
600m
|
600m | 16mph | 17mph | 14mph | 14mph | 14mph | 12mph | 9mph | 6mph |
|
300m
|
300m | 14mph | 13mph | 12mph | 10mph | 11mph | 10mph | 7mph | 3mph |
|
Valley
|
Valley | 14mph | 13mph | 12mph | 10mph | 11mph | 10mph | 7mph | 3mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 19 degrees Celsius 19°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 19 degrees Celsius 19°C |
|
600m
|
600m | 21 degrees Celsius 21°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 21 degrees Celsius 21°C | 20 degrees Celsius 20°C |
|
300m
|
300m | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 24 degrees Celsius 24°C | 25 degrees Celsius 25°C | 24 degrees Celsius 24°C | 23 degrees Celsius 23°C | 20 degrees Celsius 20°C |
|
Valley
|
Valley | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 25 degrees Celsius 25°C | 26 degrees Celsius 26°C | 24 degrees Celsius 24°C | 24 degrees Celsius 24°C | 21 degrees Celsius 21°C |
| Freezing Level | Freezing Level |
3600m
|
3600m
|
3600m
|
3600m
|
3600m
|
3700m
|
3700m
|
3600m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 18 degrees Celsius 18°C | 20 degrees Celsius 20°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 19 degrees Celsius 19°C |
|
600m
|
600m | 19 degrees Celsius 19°C | 18 degrees Celsius 18°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 20 degrees Celsius 20°C |
|
300m
|
300m | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 24 degrees Celsius 24°C | 26 degrees Celsius 26°C | 25 degrees Celsius 25°C | 24 degrees Celsius 24°C | 22 degrees Celsius 22°C |
|
Valley
|
Valley | 24 degrees Celsius 24°C | 23 degrees Celsius 23°C | 23 degrees Celsius 23°C | 26 degrees Celsius 26°C | 27 degrees Celsius 27°C | 25 degrees Celsius 25°C | 25 degrees Celsius 25°C | 22 degrees Celsius 22°C |
| Freezing Level | Freezing Level |
3600m
|
3600m
|
3600m
|
3600m
|
3600m
|
3700m
|
3700m
|
3600m
|
Additional weather information
Meteorologist's view
Very hot and humid. Pack light clothing, sun cream and plenty of hydration. UV levels very high.
Weather
Extreme heat warning issued. Some patchy cloud first thing then dry with prolonged sunny spells and light winds. Hot and humid.
Chance of cloud-free hill tops
Over 95%, almost certain.
Low cloud and visibility
Good visibility, although hazy at times.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Extreme heat warning issued. Patches of low cloud, this soon clearing then another very hot and humid day with strong sunshine. Hotter than Tuesday.
Chance of cloud-free hill tops
Over 90%
Maximum wind speed expected
Easterly 5-10 mph.
Temperature
- At 800m Plus 16 Celsius rising to plus 27 Celsius.
- Valley Plus 20 Celsius rising to plus 29 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Patches of cloud around 400m but quickly clearing. Good visibility, hazy at times.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Thu 25 Jun
Extreme heat warning issued. Very hot with sunny spells. Risk of thunderstorms later in the evening.
Fri 26 Jun
Cloudier with the chance of showers or thunderstorms. Less hot with moderate southerly winds.
Sat 27 Jun
Variable cloud and patchy rain. Temperatures closer to average. Moderate southwesterly 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.