Mountain weather
Eryri / Snowdonia
Confidence
High confidence for showers to be more persistent during the afternoon on Friday, with a general drier and more settled feel to conditions into the weekend. High confidence for staying rather cool.
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This eveningSunrise:Sunset:
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Fri 21 AugSunrise:Sunset:
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Sat 22 AugSunrise:Sunset:
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Further outlook
This evening forecast
Heavy showers easing to clear spells.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Thunderstorms
Mountain weather forecast
Heavy showers to start, becoming
|
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 |
80%
|
80%
|
40%
|
40%
|
40%
|
60%
|
60%
|
60%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | NW 15mph knots
NW
15mph |
NW 10mph knots
NW
10mph |
NE 10mph knots
NE
10mph |
NE 11mph knots
NE
11mph |
N 11mph knots
N
11mph |
N 13mph knots
N
13mph |
N 15mph knots
N
15mph |
N 15mph knots
N
15mph |
|
600m
|
600m | NW 7mph knots
NW
7mph |
NW 7mph knots
NW
7mph |
N 5mph knots
N
5mph |
NE 7mph knots
NE
7mph |
N 10mph knots
N
10mph |
N 12mph knots
N
12mph |
N 11mph knots
N
11mph |
N 7mph knots
N
7mph |
|
300m
|
300m | NW 4mph knots
NW
4mph |
NW 4mph knots
NW
4mph |
N 3mph knots
N
3mph |
N 4mph knots
N
4mph |
N 8mph knots
N
8mph |
N 10mph knots
N
10mph |
N 9mph knots
N
9mph |
N 5mph knots
N
5mph |
|
Valley
|
Valley | NW 4mph knots
NW
4mph |
NW 4mph knots
NW
4mph |
N 2mph knots
N
2mph |
N 4mph knots
N
4mph |
N 8mph knots
N
8mph |
N 10mph knots
N
10mph |
N 8mph knots
N
8mph |
N 4mph knots
N
4mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 19mph | 13mph | 12mph | 14mph | 15mph | 17mph | 19mph | 19mph |
|
600m
|
600m | 11mph | 9mph | 6mph | 10mph | 14mph | 16mph | 15mph | 11mph |
|
300m
|
300m | 9mph | 7mph | 4mph | 7mph | 13mph | 15mph | 14mph | 10mph |
|
Valley
|
Valley | 9mph | 7mph | 4mph | 7mph | 13mph | 15mph | 14mph | 9mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C |
|
600m
|
600m | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C |
|
300m
|
300m | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
1900m
|
1900m
|
1900m
|
1900m
|
1900m
|
1900m
|
1800m
|
1900m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 3 degrees Celsius 3°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 5 degrees Celsius 5°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C |
|
600m
|
600m | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C |
|
300m
|
300m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C |
|
Valley
|
Valley | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
1900m
|
1900m
|
1900m
|
1900m
|
1900m
|
1900m
|
1800m
|
1900m
|
Additional weather information
Meteorologist's view
A day to be prepared for most eventualities, with adequate waterproofs, layers and sunscreen as required with thunderstorms a risk.
Weather
Heavy showers from the start, with the risk of thunder and hail. These becoming less frequent through the day but still a chance throughout. Turning chilly by the evening.
Chance of cloud-free hill tops
70%
Low cloud and visibility
Cloud likely to shroud the very highest peaks during heavy downpours during the morning. Outside of cloud and showers, good to very good views are to be found but spells of moderate to poor visibility are expected during any heavier bursts.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A fresh start with plenty of sunny spells with a very low chance of an isolated shower first thing. Turning chilly overnight.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
Northwesterly 10-15 mph gusting 20 mph.
Temperature
- At 800m Plus 8 Celsius rising to plus 15 Celsius.
- Valley Plus 8 Celsius rising to plus 21 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Any cloud shrouding summits quickly lifting above by late morning. Excellent visibilities.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 23 Aug
Mostly dry with sunny spells and a light northerly breeze. Feeling a bit warmer.
Mon 24 Aug
Another mostly dry day, with some warm sunny spells, although winds likely to be from the east. Perhaps some cloud building from the south later in the day.
Tue 25 Aug
Turning cloudier with showers, these possibly heavy and thundery.
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.