Mountain weather
Eryri / Snowdonia
Confidence
High confidence for overall settled and warm period to come. Moderate to low confidence on detail of mist or fog. Low confidence for showers.
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Fri 10 JulSunrise:Sunset:
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Sat 11 JulSunrise:Sunset:
-
Further outlook
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Mountain weather forecast
Generally a dry and bright day with hot temperatures. Sunshine may turn slightly hazy at times.
|
Time
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Time |
06:00
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09:00
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12:00
|
15:00
|
18:00
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21:00
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|---|---|---|---|---|---|---|---|
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Weather
(at 800m)
|
Weather symbols |  |
 |
|
 |
 |
 |
|
Chance of
precipitation (at 800m)
|
Chance of precipitation |
10%
|
10%
|
10%
|
10%
|
20%
|
10%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | SE 13mph knots
SE
13mph |
SE 8mph knots
SE
8mph |
W 7mph knots
W
7mph |
N 6mph knots
N
6mph |
N 5mph knots
N
5mph |
NE 10mph knots
NE
10mph |
|
600m
|
600m | SE 5mph knots
SE
5mph |
NE 4mph knots
NE
4mph |
NW 7mph knots
NW
7mph |
NW 8mph knots
NW
8mph |
N 5mph knots
N
5mph |
NE 5mph knots
NE
5mph |
|
300m
|
300m | NW 1mph knots
NW
1mph |
NW 4mph knots
NW
4mph |
NW 6mph knots
NW
6mph |
NW 6mph knots
NW
6mph |
NW 5mph knots
NW
5mph |
NE 3mph knots
NE
3mph |
|
Valley
|
Valley | N 1mph knots
N
1mph |
NW 4mph knots
NW
4mph |
NW 7mph knots
NW
7mph |
NW 6mph knots
NW
6mph |
NW 5mph knots
NW
5mph |
SW 2mph knots
SW
2mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 16mph | 10mph | 10mph | 9mph | 6mph | 12mph |
|
600m
|
600m | 8mph | 5mph | 10mph | 10mph | 7mph | 7mph |
|
300m
|
300m | 3mph | 5mph | 9mph | 8mph | 7mph | 5mph |
|
Valley
|
Valley | 3mph | 6mph | 10mph | 9mph | 7mph | 4mph |
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | ||||||
|
600m
|
600m | ||||||
|
300m
|
300m | ||||||
|
Valley
|
Valley | ||||||
| Freezing Level | Freezing Level |
3200m
|
3100m
|
2900m
|
3000m
|
3100m
|
3300m
|
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
Low risk of isolated mist or fog patches to begin but this quickly clearing to leave a dry and bright day with plenty of sunshine. Some fair weather cloud possibly developing through the afternoon with high cloud turning sunshine slightly hazy at times, low chance of isolated showers. Remaining dry with clear skies overnight.
Chance of cloud-free hill tops
90% quickly rising to 100%.
Low cloud and visibility
Any early morning mist which may reduce visibilities a touch in valleys should clear swiftly. Fair weather cloud during the rest of the day expected to be above the summits. Excellent visibilities, with views of distant summits, away from the early morning mist and fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Staying dry with prolonged spells of sunshine. Feeling very warm or locally hot. A brisk easterly wind developing, especially on the summits.
Chance of cloud-free hill tops
Greater than 90%.
Maximum wind speed expected
Northeasterly 15-20 mph.
Temperature
- At 800m plus 14 Celsius rising to plus 21 Celsius.
- Valley plus 20 Celsius rising to plus 29 Celsius.
- Freezing level above summits.
Low cloud and visibility
Generally clear/sunny skies with no low cloud issues. Visibility will be very good throughout, with distant hills and peaks clearly visible.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sun 12 Jul
Some patchy cloud around to begin the day but quickly clearing away after sunrise. Then follows a dry and bright day with lengthy sunshine. Warm or locally hot in places. A brisk east or north-easterly wind on the summits. Freezing level above summits.
Mon 13 Jul
Largely dry with sunny spells. Temperatures slightly lower than on Sunday, but still warm or very warm, sheltered from the brisk easterly wind. Freezing level above summits.
Tue 14 Jul
Some low cloud likely once again to start Tuesday, once again clearing away quickly to leave another fine and dry day with plenty of sunshine. Brisk easterly winds over summits allowing it to feel cooler at times, but still very warm or locally hot. Freezing level above summits.
Mountain weather information
Sun 12 Jul
Some patchy cloud around to begin the day but quickly clearing away after sunrise. Then follows a dry and bright day with lengthy sunshine. Warm or locally hot in places. A brisk east or north-easterly wind on the summits. Freezing level above summits.
Mon 13 Jul
Largely dry with sunny spells. Temperatures slightly lower than on Sunday, but still warm or very warm, sheltered from the brisk easterly wind. Freezing level above summits.
Tue 14 Jul
Some low cloud likely once again to start Tuesday, once again clearing away quickly to leave another fine and dry day with plenty of sunshine. Brisk easterly winds over summits allowing it to feel cooler at times, but still very warm or locally hot. Freezing level above summits.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations