Mountain weather
Eryri / Snowdonia
Confidence
Overall high confidence but lower for thundery showers.
-
This eveningSunrise:Sunset:
-
Thu 25 JunSunrise:Sunset:
-
Fri 26 JunSunrise:Sunset:
-
Further outlook
This evening forecast
A clear evening with lots of sunshine to end the day. Very hot and humid.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Thunderstorms
Poor Visibility
Mountain weather forecast
A hot and humid day ahead with lots of sunshine. Risk of thunderstorms overnight.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
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21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
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 | E 18mph knots
E
18mph |
E 16mph knots
E
16mph |
SE 15mph knots
SE
15mph |
SE 18mph knots
SE
18mph |
SE 18mph knots
SE
18mph |
SE 20mph knots
SE
20mph |
SE 19mph knots
SE
19mph |
SE 28mph knots
SE
28mph |
|
600m
|
600m | E 13mph knots
E
13mph |
E 13mph knots
E
13mph |
SE 12mph knots
SE
12mph |
SE 13mph knots
SE
13mph |
SE 13mph knots
SE
13mph |
SE 15mph knots
SE
15mph |
SE 12mph knots
SE
12mph |
SE 17mph knots
SE
17mph |
|
300m
|
300m | E 8mph knots
E
8mph |
E 9mph knots
E
9mph |
SE 9mph knots
SE
9mph |
SE 10mph knots
SE
10mph |
SE 11mph knots
SE
11mph |
SE 11mph knots
SE
11mph |
SE 7mph knots
SE
7mph |
SE 11mph knots
SE
11mph |
|
Valley
|
Valley | SE 8mph knots
SE
8mph |
SE 9mph knots
SE
9mph |
SE 9mph knots
SE
9mph |
SE 11mph knots
SE
11mph |
SE 11mph knots
SE
11mph |
SE 11mph knots
SE
11mph |
SE 7mph knots
SE
7mph |
SE 11mph knots
SE
11mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 22mph | 22mph | 20mph | 24mph | 25mph | 27mph | 25mph | 35mph |
|
600m
|
600m | 20mph | 19mph | 18mph | 20mph | 21mph | 23mph | 18mph | 25mph |
|
300m
|
300m | 18mph | 19mph | 18mph | 18mph | 18mph | 20mph | 15mph | 22mph |
|
Valley
|
Valley | 17mph | 19mph | 19mph | 19mph | 19mph | 19mph | 15mph | 22mph |
|
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 | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 22 degrees Celsius 22°C | 23 degrees Celsius 23°C | 25 degrees Celsius 25°C | 25 degrees Celsius 25°C | 23 degrees Celsius 23°C |
|
600m
|
600m | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 23 degrees Celsius 23°C | 24 degrees Celsius 24°C | 26 degrees Celsius 26°C | 27 degrees Celsius 27°C | 28 degrees Celsius 28°C | 25 degrees Celsius 25°C |
|
300m
|
300m | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 23 degrees Celsius 23°C | 26 degrees Celsius 26°C | 29 degrees Celsius 29°C | 30 degrees Celsius 30°C | 30 degrees Celsius 30°C | 27 degrees Celsius 27°C |
|
Valley
|
Valley | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 24 degrees Celsius 24°C | 28 degrees Celsius 28°C | 30 degrees Celsius 30°C | 32 degrees Celsius 32°C | 31 degrees Celsius 31°C | 28 degrees Celsius 28°C |
| Freezing Level | Freezing Level |
3800m
|
3800m
|
3800m
|
3700m
|
3700m
|
3700m
|
3700m
|
3700m
|
|
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 | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 17 degrees Celsius 17°C |
|
600m
|
600m | 19 degrees Celsius 19°C | 19 degrees Celsius 19°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 24 degrees Celsius 24°C | 25 degrees Celsius 25°C | 27 degrees Celsius 27°C | 23 degrees Celsius 23°C |
|
300m
|
300m | 21 degrees Celsius 21°C | 21 degrees Celsius 21°C | 22 degrees Celsius 22°C | 26 degrees Celsius 26°C | 28 degrees Celsius 28°C | 30 degrees Celsius 30°C | 31 degrees Celsius 31°C | 26 degrees Celsius 26°C |
|
Valley
|
Valley | 21 degrees Celsius 21°C | 21 degrees Celsius 21°C | 23 degrees Celsius 23°C | 27 degrees Celsius 27°C | 30 degrees Celsius 30°C | 32 degrees Celsius 32°C | 33 degrees Celsius 33°C | 28 degrees Celsius 28°C |
| Freezing Level | Freezing Level |
3800m
|
3800m
|
3800m
|
3700m
|
3700m
|
3700m
|
3700m
|
3700m
|
Additional weather information
Meteorologist's view
Very hot and humid conditions are expected so carry plenty of water and use adequate sun protection. Stay up to date with Met Office warnings for extreme heat. There is a risk of thunderstorms developing later, bringing frequent lightning and strong, gusty winds, creating potentially dangerous conditions on exposed terrain.
Weather
A clear day with lots of sunshine. Overnight, increasing amounts of medium level cloud which brings the risk of showers and thundery downpours. It will be very hot and humid.
Chance of cloud-free hill tops
>90%
Low cloud and visibility
Little to no low cloud and excellent visibility across the park. A chance of reduced visibility in the evening due to thunderstorm risk.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Thundery showers clearing in the morning to a mix of fair weather cloud and sunny spells by the afternoon. Not feeling as quite as hot as Thursday, but still very warm and humid.
Chance of cloud-free hill tops
80% with a small risk of some low cloud in the west at times.
Maximum wind speed expected
25-30 mph
Temperature
- At 800m Plus 19 Celsius rising to plus 25 Celsius
- Valley Plus 20 Celsius rising to plus 32 Celsius
- Freezing level Above summits
Low cloud and visibility
Little to no low cloud though a chance of cloud bases dropping to around 400-500m in western areas of the park during the day, though this risk reduces by the evening with very good visibility expected.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sat 27 Jun
More cloud around on Saturday with an increasing risk of showers later. Light to moderate southerly winds.
Sun 28 Jun
A mix of cloud and sunny spells. A chance of showers. Feeling much fresher than of late. Light to moderate westerly winds.
Mon 29 Jun
Similar to Sunday.
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.