Mountain weather
Eryri / Snowdonia
Confidence
High throughout.
-
This eveningSunrise:Sunset:
-
Sat 20 JunSunrise:Sunset:
-
Sun 21 JunSunrise:Sunset:
-
Further outlook
This evening forecast
Cloudy through the rest of the evening, with outbreaks of heavy rain and poor visibility at times.
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
Turning increasingly Sunny.
|
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 |
70%
|
50%
|
30%
|
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 28mph knots
SW
28mph |
SW 24mph knots
SW
24mph |
W 13mph knots
W
13mph |
W 13mph knots
W
13mph |
W 12mph knots
W
12mph |
W 10mph knots
W
10mph |
NW 6mph knots
NW
6mph |
NE 6mph knots
NE
6mph |
|
600m
|
600m | SW 17mph knots
SW
17mph |
SW 15mph knots
SW
15mph |
W 9mph knots
W
9mph |
W 11mph knots
W
11mph |
W 10mph knots
W
10mph |
W 8mph knots
W
8mph |
NW 5mph knots
NW
5mph |
NE 3mph knots
NE
3mph |
|
300m
|
300m | SW 10mph knots
SW
10mph |
SW 8mph knots
SW
8mph |
W 5mph knots
W
5mph |
W 7mph knots
W
7mph |
W 8mph knots
W
8mph |
W 7mph knots
W
7mph |
NW 4mph knots
NW
4mph |
E 1mph knots
E
1mph |
|
Valley
|
Valley | SW 10mph knots
SW
10mph |
SW 8mph knots
SW
8mph |
W 5mph knots
W
5mph |
W 8mph knots
W
8mph |
W 8mph knots
W
8mph |
NW 7mph knots
NW
7mph |
NW 4mph knots
NW
4mph |
SW 1mph knots
SW
1mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 34mph | 29mph | 16mph | 18mph | 17mph | 14mph | 9mph | 8mph |
|
600m
|
600m | 23mph | 19mph | 12mph | 15mph | 15mph | 12mph | 8mph | 5mph |
|
300m
|
300m | 20mph | 16mph | 8mph | 11mph | 12mph | 11mph | 7mph | 4mph |
|
Valley
|
Valley | 19mph | 15mph | 9mph | 11mph | 13mph | 11mph | 7mph | 4mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 11 degrees Celsius 11°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
|
600m
|
600m | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 13 degrees Celsius 13°C |
|
Valley
|
Valley | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2600m
|
2300m
|
2100m
|
1800m
|
1800m
|
1800m
|
1800m
|
1800m
|
|
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 | 5 degrees Celsius 5°C | 5 degrees Celsius 5°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 9 degrees Celsius 9°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C |
|
300m
|
300m | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 13 degrees Celsius 13°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2600m
|
2300m
|
2100m
|
1800m
|
1800m
|
1800m
|
1800m
|
1800m
|
Additional weather information
Meteorologist's view
Warm and humid conditions will persist over the coming days, increasing the risk of dehydration on the hills. Those heading out, especially on longer hikes, should carry extra water and pace accordingly.
Weather
Staying cloudy during the early hours, with outbreaks of rain and drizzle. Drier towards dawn as the clouds break up, leaving plenty of sunny spells through the rest of the day.
Chance of cloud-free hill tops
40% during the early hours but rising to 100% during the morning.
Low cloud and visibility
300m cloud bases during the early hours, clearing above the summits during the morning. Moderate to poor under cloud cover, but returning to excellent visibility as the morning progresses.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Prolonged clear skies during the early hours. Perhaps some shallow mist patches in the valleys for a short period around daw. A dry and sunny day ahead.
Chance of cloud-free hill tops
100% throughout.
Maximum wind speed expected
Easterly 15-20 mph, gusting 25-30 mph,
Temperature
- At 800m Plus 9 Celsius, rising to plus 17 Celsius.
- Valley Plus 10 Celsius, rising to plus 25 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
High cloud making the sunshine hazy at times, but otherwise excellent visibility is expected throughout.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 22 Jun
Plenty of sunny spells. Very warm and humid. The small risk of a late afternoon shower or thunderstorm. Light southerly winds.
Tue 23 Jun
Prolonged spells of sunshine and remaining very warm. Light easterly winds.
Wed 24 Jun
Morning low cloud lifting to leave a dry and sunny day. Moderate northerly breeze.
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.