Mountain weather
Eryri / Snowdonia
Confidence
High overall. Low to moderate for possible thunderstorms.
-
This eveningSunrise:Sunset:
-
Mon 13 JulSunrise:Sunset:
-
Tue 14 JulSunrise:Sunset:
-
Further outlook
This evening forecast
Plenty of evening sunshine and remaining warm, remaining dry and clear overnight with easterly winds increasing particularly over higher ground.
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 dry and bright day ahead with lengthy sunshine. Moderate to strong easterly winds.
|
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 |
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
<5%
|
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 | E 33mph knots
E
33mph |
E 27mph knots
E
27mph |
E 25mph knots
E
25mph |
E 25mph knots
E
25mph |
E 23mph knots
E
23mph |
E 22mph knots
E
22mph |
E 24mph knots
E
24mph |
E 32mph knots
E
32mph |
|
600m
|
600m | E 21mph knots
E
21mph |
E 18mph knots
E
18mph |
E 17mph knots
E
17mph |
E 16mph knots
E
16mph |
E 16mph knots
E
16mph |
E 16mph knots
E
16mph |
NE 14mph knots
NE
14mph |
E 17mph knots
E
17mph |
|
300m
|
300m | E 14mph knots
E
14mph |
E 11mph knots
E
11mph |
E 10mph knots
E
10mph |
E 10mph knots
E
10mph |
E 11mph knots
E
11mph |
E 10mph knots
E
10mph |
NE 9mph knots
NE
9mph |
E 11mph knots
E
11mph |
|
Valley
|
Valley | E 13mph knots
E
13mph |
E 11mph knots
E
11mph |
E 10mph knots
E
10mph |
E 10mph knots
E
10mph |
E 11mph knots
E
11mph |
NE 10mph knots
NE
10mph |
NE 9mph knots
NE
9mph |
E 10mph knots
E
10mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 44mph | 36mph | 32mph | 32mph | 31mph | 30mph | 30mph | 42mph |
|
600m
|
600m | 35mph | 30mph | 27mph | 23mph | 23mph | 23mph | 20mph | 28mph |
|
300m
|
300m | 29mph | 23mph | 20mph | 19mph | 19mph | 19mph | 17mph | 24mph |
|
Valley
|
Valley | 28mph | 22mph | 20mph | 19mph | 18mph | 18mph | 17mph | 23mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 14 degrees Celsius 14°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 14 degrees Celsius 14°C |
|
600m
|
600m | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 17 degrees Celsius 17°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 17 degrees Celsius 17°C |
|
300m
|
300m | 17 degrees Celsius 17°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 17 degrees Celsius 17°C | 20 degrees Celsius 20°C | 22 degrees Celsius 22°C | 22 degrees Celsius 22°C | 19 degrees Celsius 19°C |
|
Valley
|
Valley | 18 degrees Celsius 18°C | 17 degrees Celsius 17°C | 17 degrees Celsius 17°C | 18 degrees Celsius 18°C | 21 degrees Celsius 21°C | 23 degrees Celsius 23°C | 22 degrees Celsius 22°C | 20 degrees Celsius 20°C |
| Freezing Level | Freezing Level |
2700m
|
2500m
|
2500m
|
2400m
|
2400m
|
2300m
|
2300m
|
2300m
|
|
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 | 8 degrees Celsius 8°C | 7 degrees Celsius 7°C | 7 degrees Celsius 7°C | 10 degrees Celsius 10°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 8 degrees Celsius 8°C |
|
600m
|
600m | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 14 degrees Celsius 14°C | 16 degrees Celsius 16°C | 16 degrees Celsius 16°C | 13 degrees Celsius 13°C |
|
300m
|
300m | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 17 degrees Celsius 17°C | 20 degrees Celsius 20°C | 20 degrees Celsius 20°C | 16 degrees Celsius 16°C |
|
Valley
|
Valley | 16 degrees Celsius 16°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 16 degrees Celsius 16°C | 19 degrees Celsius 19°C | 21 degrees Celsius 21°C | 21 degrees Celsius 21°C | 18 degrees Celsius 18°C |
| Freezing Level | Freezing Level |
2700m
|
2500m
|
2500m
|
2400m
|
2400m
|
2300m
|
2300m
|
2300m
|
Additional weather information
Meteorologist's view
A brilliant day to be in the national park, however sun protection application and re-application is advised due to very high UV levels. Additionally, the high temperatures may exhaust individuals, especially in the afternoon. Frequent rehydration and taking regular breaks from strenuous activities is advisable. A hat and eye protection should also be considered.
Weather
A dry and bright day with lengthy spells of sunshine and a brisk easterly breeze. Through the evening cloud is likely to increase from the south.
Chance of cloud-free hill tops
>95%.
Low cloud and visibility
Patchy cloud bases around 500-600m, quickly lifting and dissipating to leave cloud free summits. Low cloud, mainly to the east of the park, may limit visibilities briefly around dawn on the highest peaks. This will quickly clear away to leave excellent visibilities with views of distant peaks possible.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Some patchy cloud initially, mainly to the east of the park, quickly clearing away to leave a dry and bright day with lengthy sunshine. Brisk easterly winds easing slightly.
Chance of cloud-free hill tops
70% rising to >95%
Maximum wind speed expected
Easterly 20-25 mph.
Temperature
- At 800m plus 10 Celsius rising to plus 18 Celsius.
- Valley plus 15 Celsius rising to plus 25 Celsius.
- Freezing level above summits.
Low cloud and visibility
Patchy cloud bases around 400-600m, quickly lifting and dissipating to leave cloud free summits. Low cloud, mainly to the east of the park, may limit visibilities briefly around dawn on the highest peaks. This will quickly clear away to leave excellent visibilities with views of distant peaks possible.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 15 Jul
Another dry and bright day ahead with patchy cloud around at times. Very low risk of the odd thundery shower during the afternoon. Brisk easterly winds continue. Freezing level above summits.
Thu 16 Jul
A similar day ahead with plenty of dry and bright weather around although more in the way of patchy cloud through the afternoon with an slight increased risk of heavy and potentially thundery showers. Freezing level above summits.
Fri 17 Jul
As with Thursday Friday is expected to bring a dry and bright start with cloud and the potential for thundery downpours. Freezing level above summits.
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.