Mountain weather
Eryri / Snowdonia
Confidence
High for overall story, low for details of rain and cloud from Monday onwards.
-
This eveningSunrise:Sunset:
-
Fri 31 JulSunrise:Sunset:
-
Sat 1 AugSunrise:Sunset:
-
Further outlook
This evening forecast
Plenty of sunshine to end the evening cloud clearing to leave a dry and mostly clear night, although the patchy cloud increasing later. Light to moderate northwesterly winds.
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
A day of variable cloud and sunny spells with some isolated showers possible.
|
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 |
30%
|
10%
|
10%
|
10%
|
10%
|
20%
|
30%
|
30%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | W 12mph knots
W
12mph |
W 10mph knots
W
10mph |
W 13mph knots
W
13mph |
W 15mph knots
W
15mph |
W 17mph knots
W
17mph |
W 17mph knots
W
17mph |
SW 18mph knots
SW
18mph |
SW 17mph knots
SW
17mph |
|
600m
|
600m | SW 8mph knots
SW
8mph |
SW 7mph knots
SW
7mph |
W 7mph knots
W
7mph |
W 13mph knots
W
13mph |
W 14mph knots
W
14mph |
W 14mph knots
W
14mph |
SW 14mph knots
SW
14mph |
SW 10mph knots
SW
10mph |
|
300m
|
300m | S 3mph knots
S
3mph |
SW 3mph knots
SW
3mph |
W 4mph knots
W
4mph |
W 10mph knots
W
10mph |
W 11mph knots
W
11mph |
W 10mph knots
W
10mph |
SW 10mph knots
SW
10mph |
SW 7mph knots
SW
7mph |
|
Valley
|
Valley | S 4mph knots
S
4mph |
SW 3mph knots
SW
3mph |
W 4mph knots
W
4mph |
W 10mph knots
W
10mph |
W 11mph knots
W
11mph |
W 10mph knots
W
10mph |
SW 10mph knots
SW
10mph |
SW 7mph knots
SW
7mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 14mph | 12mph | 16mph | 20mph | 23mph | 23mph | 23mph | 21mph |
|
600m
|
600m | 10mph | 9mph | 9mph | 17mph | 20mph | 19mph | 19mph | 15mph |
|
300m
|
300m | 7mph | 6mph | 8mph | 15mph | 18mph | 17mph | 18mph | 14mph |
|
Valley
|
Valley | 7mph | 6mph | 8mph | 15mph | 18mph | 17mph | 18mph | 14mph |
|
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 | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 10 degrees Celsius 10°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 | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C |
|
300m
|
300m | 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 | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
1900m
|
1800m
|
1700m
|
1800m
|
1800m
|
1900m
|
2000m
|
2000m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 4 degrees Celsius 4°C | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°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 | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
|
300m
|
300m | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C |
|
Valley
|
Valley | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
1900m
|
1800m
|
1700m
|
1800m
|
1800m
|
1900m
|
2000m
|
2000m
|
Additional weather information
Meteorologist's view
A good day to be in the national park with plenty of dry and bright weather and light to moderate winds. Although it will be rather cloudy high UV levels are still expected throughout the day so sun protection is advised. With the risk of passing showers, waterproof are also advised.
Weather
A day of variable cloud and some bright or sunny spells at times. Although it will be generally dry an isolated shower cannot be ruled out, they will be mainly light but a few heavier bursts are possible. Light to moderate northwesterly winds.
Chance of cloud-free hill tops
90%
Low cloud and visibility
Some patchy cloud with bases above 700-900 m, may temporarily limit visibility, however cloud should move through quickly. Most cloud cover is expected to be above summits throughout the day with no impacts to visibilities expected. Very good or excellent visibilities throughout with views of distant peak possible. Visibilities may also drop to moderate in any passing showers.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Another dry and bright day ahead on Saturday with variable cloud and sunny spells. Light to moderate winds once again.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
Westerly 15-20 mph.
Temperature
- At 800m plus 8 Celsius rising to plus 12 Celsius.
- Valley plus 10 Celsius rising to plus 17 Celsius.
- Freezing level above summits.
Low cloud and visibility
Some patchy cloud with bases above 700-900 m, may temporarily limit visibility, however cloud should move through quickly. Most cloud cover is expected to be above summits throughout the day with no impacts to visibilities expected. Very good or excellent visibilities throughout with views of distant peak possible.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 2 Aug
Another dry day ahead with some hazy sunshine. Clouding over later with a small chance of some light rain from late afternoon onwards. A gentle to moderate easterly breeze.
Mon 3 Aug
A rather cloudy day ahead with outbreaks of light rain and drizzle through the morning. Rain turning more showery in nature through from late afternoon with some heavier bursts possible. Light to moderate easterly winds.
Tue 4 Aug
Cloudy with showery outbreaks through the day some of these maybe be heavy in nature with the potential for the odd rumble of thunder.
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.