Mountain weather
Eryri / Snowdonia
Confidence
High overall.
-
This eveningSunrise:Sunset:
-
Thu 18 JunSunrise:Sunset:
-
Fri 19 JunSunrise:Sunset:
-
Further outlook
This evening forecast
Bright spells to finish off the day before low cloud, and some drizzle, returns tonight.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Thunderstorms
Mountain weather forecast
Often cloudy with hill fog, and some drizzle.
|
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 |
10%
|
10%
|
10%
|
30%
|
30%
|
40%
|
40%
|
40%
|
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 22mph knots
SW
22mph |
S 23mph knots
S
23mph |
S 33mph knots
S
33mph |
S 38mph knots
S
38mph |
S 33mph knots
S
33mph |
S 32mph knots
S
32mph |
SW 30mph knots
SW
30mph |
S 28mph knots
S
28mph |
|
600m
|
600m | S 16mph knots
S
16mph |
S 19mph knots
S
19mph |
S 22mph knots
S
22mph |
S 28mph knots
S
28mph |
S 25mph knots
S
25mph |
S 24mph knots
S
24mph |
S 20mph knots
S
20mph |
S 19mph knots
S
19mph |
|
300m
|
300m | S 11mph knots
S
11mph |
S 13mph knots
S
13mph |
S 15mph knots
S
15mph |
S 20mph knots
S
20mph |
S 18mph knots
S
18mph |
S 17mph knots
S
17mph |
S 13mph knots
S
13mph |
S 13mph knots
S
13mph |
|
Valley
|
Valley | S 11mph knots
S
11mph |
S 13mph knots
S
13mph |
S 15mph knots
S
15mph |
S 19mph knots
S
19mph |
S 18mph knots
S
18mph |
S 17mph knots
S
17mph |
S 13mph knots
S
13mph |
S 13mph knots
S
13mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 28mph | 29mph | 41mph | 47mph | 42mph | 41mph | 37mph | 36mph |
|
600m
|
600m | 22mph | 25mph | 29mph | 37mph | 33mph | 32mph | 27mph | 26mph |
|
300m
|
300m | 20mph | 24mph | 26mph | 34mph | 31mph | 29mph | 24mph | 24mph |
|
Valley
|
Valley | 20mph | 24mph | 25mph | 32mph | 31mph | 29mph | 24mph | 23mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C |
|
600m
|
600m | 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 | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C |
|
300m
|
300m | 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 | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C |
| Freezing Level | Freezing Level |
3200m
|
3400m
|
3400m
|
3300m
|
3400m
|
3300m
|
3100m
|
3100m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C |
|
600m
|
600m | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C |
|
300m
|
300m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C |
|
Valley
|
Valley | 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 | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
3200m
|
3400m
|
3400m
|
3300m
|
3400m
|
3300m
|
3100m
|
3100m
|
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
Persistent cloud on Thursday with hill fog possible for much of the day, especially in western areas of the park. A chance of cloud breaks or brighter spells in the east of the park at times, mainly later in the afternoon. Spells of rain and drizzle developing at times.
Chance of cloud-free hill tops
Largely 30%.
Low cloud and visibility
Cloud sat at 300-400m for much of the day, shrouding many hills in fog. Visibility mostly poor on the hills, dropping to very poor in any rain.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Similar to Thursday. Persistent cloud at times with hill fog possible for much of the day, especially in western areas of the park. Spots of rain and drizzle possible at times. Feeling warm and humid.
Chance of cloud-free hill tops
20%.
Maximum wind speed expected
15-20 mph in exposed areas
Temperature
- At 800m 15 Celsius, rising to plus 18 Celsius.
- Valley 16 Celsius, rising to plus 22 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Cloud sat at 300-400m for much of the day, shrouding many hills in fog. Visibility mostly poor on the hills, dropping to very poor in any rain.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sat 20 Jun
A dry day with sunny spells developing after early low cloud lifts and clears. Sunshine potentially being hazy due to variable amounts of high-based cloud. A light to moderate westerly breeze.
Sun 21 Jun
Mostly dry, with sunny spells and sunshine possibly hazy again at times. Calm and variable winds.
Mon 22 Jun
A dry day with lots of sunshine. Feeling warm and humid. Light 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.