Mountain weather
Eryri / Snowdonia
Confidence
High for a mostly dry and settled weekend. Moderate for details of rain or showers next week.
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This eveningSunrise:Sunset:
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Sat 15 AugSunrise:Sunset:
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Sun 16 AugSunrise:Sunset:
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Further outlook
This evening forecast
Mainly dry this evening but a small chance of a shower.
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
Cloud breaking to give sunny spells. Feeling fresher.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
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15:00
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18:00
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21:00
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|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
30%
|
30%
|
30%
|
20%
|
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 | N 17mph knots
N
17mph |
N 18mph knots
N
18mph |
N 17mph knots
N
17mph |
N 15mph knots
N
15mph |
N 12mph knots
N
12mph |
N 12mph knots
N
12mph |
N 11mph knots
N
11mph |
N 14mph knots
N
14mph |
|
600m
|
600m | N 9mph knots
N
9mph |
N 10mph knots
N
10mph |
N 11mph knots
N
11mph |
N 12mph knots
N
12mph |
N 11mph knots
N
11mph |
N 11mph knots
N
11mph |
N 10mph knots
N
10mph |
N 6mph knots
N
6mph |
|
300m
|
300m | N 5mph knots
N
5mph |
N 6mph knots
N
6mph |
N 7mph knots
N
7mph |
N 9mph knots
N
9mph |
N 9mph knots
N
9mph |
N 9mph knots
N
9mph |
N 8mph knots
N
8mph |
N 3mph knots
N
3mph |
|
Valley
|
Valley | N 6mph knots
N
6mph |
N 7mph knots
N
7mph |
N 8mph knots
N
8mph |
N 10mph knots
N
10mph |
N 9mph knots
N
9mph |
N 10mph knots
N
10mph |
N 8mph knots
N
8mph |
NW 3mph knots
NW
3mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 22mph | 21mph | 20mph | 19mph | 16mph | 17mph | 15mph | 20mph |
|
600m
|
600m | 12mph | 13mph | 14mph | 17mph | 15mph | 16mph | 13mph | 10mph |
|
300m
|
300m | 12mph | 12mph | 13mph | 15mph | 14mph | 14mph | 12mph | 9mph |
|
Valley
|
Valley | 12mph | 13mph | 14mph | 16mph | 14mph | 15mph | 12mph | 9mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2600m
|
2600m
|
2300m
|
2200m
|
2000m
|
2000m
|
2300m
|
2600m
|
|
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 | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 5 degrees Celsius 5°C |
|
600m
|
600m | 10 degrees Celsius 10°C | 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 | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C |
|
300m
|
300m | 13 degrees Celsius 13°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 | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2600m
|
2600m
|
2300m
|
2200m
|
2000m
|
2000m
|
2300m
|
2600m
|
Additional weather information
Meteorologist's view
Feeling considerably cooler than recent days, but still warm in the sunshine and out of the breeze.
Weather
Often cloudy through the morning but with occasional bright or sunny intervals. Increasing amounts of sunshine as the afternoon progresses and staying fine through the evening.
Chance of cloud-free hill tops
60% becoming 90%
Low cloud and visibility
Periods of cloud above 700-800m first thing, gradually lifting to 900m by mid-morning and clearing the summits by noon at the latest. Very poor visibility in hill fog first, but otherwise very good visibility with distant views of landmarks and mountains.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Another generally dry day with bright or sunny periods. Cloud may thicken at times and the odd light shower is possible during the afternoon and evening.
Chance of cloud-free hill tops
80%
Maximum wind speed expected
Westerly 10-15 mph.
Temperature
- At 800m Plus 8 Celsius rising to plus 14 Celsius.
- Valley Plus 8 Celsius rising to plus 21 Celsius.
- Freezing level Well above the summits.
Low cloud and visibility
Patches of cloud above 900-950m possible at times, but most summits cloud free. Generally very good visibility but locally very poor in cloud and hill fog.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 17 Aug
Largely cloudy with low cloud and hill fog. Periods of rain and drizzle, possibly turning more persistent later in the day. Moderate southwesterly winds.
Tue 18 Aug
Cloudy and damp at times with occasional rain possible. Light to moderate westerly winds.
Wed 19 Aug
A brighter day is expected with sunny spells. Light to 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.