Mountain weather
Eryri / Snowdonia
Confidence
High overall but lower for extent of heavy showers on Saturday.
-
Sat 9 MaySunrise:Sunset:
-
Sun 10 MaySunrise:Sunset:
-
Further outlook
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Poor Visibility
Severe Chill Effect
Thunderstorms
Strong Sunlight
Mountain weather forecast
A dry and bright start but showers by the afternoon.
|
Time
|
Time |
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 |
20%
|
20%
|
50%
|
60%
|
50%
|
30%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | NE 7mph knots
NE
7mph |
N 11mph knots
N
11mph |
N 12mph knots
N
12mph |
N 16mph knots
N
16mph |
NE 22mph knots
NE
22mph |
NE 25mph knots
NE
25mph |
|
600m
|
600m | N 4mph knots
N
4mph |
N 8mph knots
N
8mph |
N 11mph knots
N
11mph |
N 14mph knots
N
14mph |
NE 14mph knots
NE
14mph |
E 12mph knots
E
12mph |
|
300m
|
300m | NW 3mph knots
NW
3mph |
N 9mph knots
N
9mph |
N 10mph knots
N
10mph |
N 12mph knots
N
12mph |
NE 12mph knots
NE
12mph |
E 9mph knots
E
9mph |
|
Valley
|
Valley | NW 3mph knots
NW
3mph |
N 8mph knots
N
8mph |
N 10mph knots
N
10mph |
N 12mph knots
N
12mph |
NE 12mph knots
NE
12mph |
E 9mph knots
E
9mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 10mph | 15mph | 16mph | 21mph | 28mph | 34mph |
|
600m
|
600m | 5mph | 12mph | 15mph | 19mph | 21mph | 22mph |
|
300m
|
300m | 4mph | 14mph | 16mph | 19mph | 22mph | 21mph |
|
Valley
|
Valley | 4mph | 13mph | 16mph | 19mph | 21mph | 20mph |
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C |
|
600m
|
600m | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C | 6 degrees Celsius 6°C |
|
300m
|
300m | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 8 degrees Celsius 8°C |
|
Valley
|
Valley | 9 degrees Celsius 9°C | 11 degrees Celsius 11°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
| Freezing Level | Freezing Level |
1700m
|
1700m
|
1700m
|
1700m
|
1700m
|
1600m
|
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 3 degrees Celsius 3°C | 3 degrees Celsius 3°C | 3 degrees Celsius 3°C | 2 degrees Celsius 2°C | 0 degrees Celsius 0°C | -3 degrees Celsius -3°C |
|
600m
|
600m | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C | 2 degrees Celsius 2°C |
|
300m
|
300m | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 6 degrees Celsius 6°C |
|
Valley
|
Valley | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
| Freezing Level | Freezing Level |
1700m
|
1700m
|
1700m
|
1700m
|
1700m
|
1600m
|
Additional weather information
Meteorologist's view
UV levels remain moderate to high, so sun protection is recommended.
Weather
Low cloud and hill fog lifting to leave a dry and bright start. Turning increasingly cloudy from midday with widespread showers across the park. These may turn heavy at times, before becoming more persistent spells of rain by the evening.
Chance of cloud-free hill tops
60%
Low cloud and visibility
Low cloud and hill fog down to 400-600m, only slowly lifting to mostly above summits by midday. Low cloud more extensive by the end of the day down to 700m. Good visibility but dropping to poor in low cloud and heavy showers.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A dry and bright day ahead with lots of sunshine. Feeling cooler than recent days.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
10-15 mph
Temperature
- At 800m Plus 5 Celsius rising to plus 13 Celsius.
- Valley Plus 5 Celsius rising to plus 15 Celsius.
- Freezing level Above freezing.
Low cloud and visibility
Some mist and fog possible in valleys to start. Quickly clearing after dawn to leave little to no low cloud and excellent visibility.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 11 May
A cold start and bright start. Turning more unsettled with showers or longer spells of rain. Chilly with moderate northerlywesterly winds.
Tue 12 May
Mostly dry with sunny intervals. Chance of the odd shower, especially in the north of the park. Light to moderate northwesterly winds.
Wed 13 May
Sunny spells and heavy showers. Moderate westerly winds.
Mountain weather information
Mon 11 May
A cold start and bright start. Turning more unsettled with showers or longer spells of rain. Chilly with moderate northerlywesterly winds.
Tue 12 May
Mostly dry with sunny intervals. Chance of the odd shower, especially in the north of the park. Light to moderate northwesterly winds.
Wed 13 May
Sunny spells and heavy showers. Moderate westerly 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.