Mountain weather
Eryri / Snowdonia
Confidence
Generally high.
-
This eveningSunrise:Sunset:
-
Fri 17 JulSunrise:Sunset:
-
Sat 18 JulSunrise:Sunset:
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Further outlook
This evening forecast
Late evening sunny spells to end the day then clear skies overnight.
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
A fine and dry day with plenty of sunshine.
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
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18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
Weather
(at 800m)
|
Weather symbols | ||||||||
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
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 | NE 7mph knots
NE
7mph |
NE 7mph knots
NE
7mph |
N 9mph knots
N
9mph |
NW 10mph knots
NW
10mph |
N 12mph knots
N
12mph |
N 13mph knots
N
13mph |
N 11mph knots
N
11mph |
N 13mph knots
N
13mph |
|
600m
|
600m | NE 5mph knots
NE
5mph |
SE 4mph knots
SE
4mph |
N 5mph knots
N
5mph |
NW 9mph knots
NW
9mph |
N 12mph knots
N
12mph |
N 12mph knots
N
12mph |
N 10mph knots
N
10mph |
N 7mph knots
N
7mph |
|
300m
|
300m | NW 3mph knots
NW
3mph |
E 2mph knots
E
2mph |
N 2mph knots
N
2mph |
NW 6mph knots
NW
6mph |
N 10mph knots
N
10mph |
N 10mph knots
N
10mph |
N 7mph knots
N
7mph |
N 4mph knots
N
4mph |
|
Valley
|
Valley | NW 2mph knots
NW
2mph |
SW 2mph knots
SW
2mph |
NW 2mph knots
NW
2mph |
NW 6mph knots
NW
6mph |
N 10mph knots
N
10mph |
N 9mph knots
N
9mph |
N 7mph knots
N
7mph |
NW 4mph knots
NW
4mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 9mph | 9mph | 11mph | 14mph | 17mph | 17mph | 15mph | 18mph |
|
600m
|
600m | 7mph | 5mph | 6mph | 12mph | 17mph | 17mph | 14mph | 11mph |
|
300m
|
300m | 4mph | 4mph | 3mph | 8mph | 14mph | 14mph | 11mph | 9mph |
|
Valley
|
Valley | 4mph | 3mph | 3mph | 9mph | 14mph | 14mph | 11mph | 8mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
600m
|
600m | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 16 degrees Celsius 16°C | 14 degrees Celsius 14°C |
|
300m
|
300m | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 19 degrees Celsius 19°C | 20 degrees Celsius 20°C | 19 degrees Celsius 19°C | 18 degrees Celsius 18°C | 15 degrees Celsius 15°C |
|
Valley
|
Valley | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 20 degrees Celsius 20°C | 21 degrees Celsius 21°C | 20 degrees Celsius 20°C | 19 degrees Celsius 19°C | 16 degrees Celsius 16°C |
| Freezing Level | Freezing Level |
2700m
|
2600m
|
2600m
|
2600m
|
2500m
|
2800m
|
2700m
|
2500m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 10 degrees Celsius 10°C |
|
600m
|
600m | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 12 degrees Celsius 12°C |
|
300m
|
300m | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 15 degrees Celsius 15°C |
|
Valley
|
Valley | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 19 degrees Celsius 19°C | 19 degrees Celsius 19°C | 19 degrees Celsius 19°C | 18 degrees Celsius 18°C | 16 degrees Celsius 16°C |
| Freezing Level | Freezing Level |
2700m
|
2600m
|
2600m
|
2600m
|
2500m
|
2800m
|
2700m
|
2500m
|
Additional weather information
Meteorologist's view
A brilliant day to be in the national park. However, applying sunscreen regularly is advised as well as wearing a hat and sunglasses because UV levels will be very high. High temperatures, especially during the afternoon, may lead to heat exhaustion. Keep hydrated by drinking plenty of water, and taking regular breaks from strenuous activity.
Weather
Dry with mostly clear skies overnight. Another dry and bright day with plenty of strong sunshine, this possibly turning a little hazy at times due to high-level cloud. Gentle to moderate easterly winds gradually becoming northerly.
Chance of cloud-free hill tops
>95%
Low cloud and visibility
Little to no low cloud or visibility issues expected. Visibilities expected to be excellent with very good views of distant peaks possible.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Another warm day ahead with lots of sunshine. Few amounts of low cloud possible to start. Any sunshine may also turn hazy at times due to high cloud.
Chance of cloud-free hill tops
90%
Maximum wind speed expected
20 mph
Temperature
- At 800m Plus 12 Celsius, reaching Plus 16 Celsius.
- Valley Plus 14 Celsius, reaching Plus 25 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Few isolated amounts of low cloud around 400-500m possible first thing. Clearing quickly leaving little to no low cloud, and excellent visibility across the national park.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 19 Jul
Similar conditions to Saturday; dry with sunny spells. Temperatures slightly lower than on Saturday, but still feeling warm, with light and variable winds.
Mon 20 Jul
Dry with variable cloud and bright or sunny spells. Temperatures near normal or still warm. Light and variable winds.
Tue 21 Jul
Similar to Monday.
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.