Mountain weather
Eryri / Snowdonia
Confidence
High throughout, though low for rain ad shower details later in the week.
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This eveningSunrise:Sunset:
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Mon 24 AugSunrise:Sunset:
-
Tue 25 AugSunrise:Sunset:
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Further outlook
This evening forecast
Plenty of dry weather to come this evening with sunshine and light winds.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Strong Sunlight
Mountain weather forecast
Dry and fine day ahead with more settled weather.
|
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%
|
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 | E 13mph knots
E
13mph |
E 14mph knots
E
14mph |
E 14mph knots
E
14mph |
SE 14mph knots
SE
14mph |
E 16mph knots
E
16mph |
E 17mph knots
E
17mph |
E 19mph knots
E
19mph |
E 28mph knots
E
28mph |
|
600m
|
600m | E 10mph knots
E
10mph |
E 11mph knots
E
11mph |
E 10mph knots
E
10mph |
SE 10mph knots
SE
10mph |
E 12mph knots
E
12mph |
E 13mph knots
E
13mph |
E 11mph knots
E
11mph |
E 17mph knots
E
17mph |
|
300m
|
300m | E 7mph knots
E
7mph |
E 8mph knots
E
8mph |
E 8mph knots
E
8mph |
SE 8mph knots
SE
8mph |
SE 10mph knots
SE
10mph |
E 10mph knots
E
10mph |
E 8mph knots
E
8mph |
E 12mph knots
E
12mph |
|
Valley
|
Valley | SE 6mph knots
SE
6mph |
SE 7mph knots
SE
7mph |
SE 8mph knots
SE
8mph |
SE 8mph knots
SE
8mph |
SE 10mph knots
SE
10mph |
E 11mph knots
E
11mph |
E 8mph knots
E
8mph |
E 11mph knots
E
11mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 16mph | 18mph | 18mph | 19mph | 23mph | 25mph | 25mph | 37mph |
|
600m
|
600m | 14mph | 16mph | 14mph | 14mph | 19mph | 20mph | 18mph | 27mph |
|
300m
|
300m | 14mph | 15mph | 14mph | 13mph | 17mph | 19mph | 17mph | 24mph |
|
Valley
|
Valley | 13mph | 15mph | 14mph | 13mph | 17mph | 19mph | 17mph | 22mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | ||||||||
|
600m
|
600m | ||||||||
|
300m
|
300m | ||||||||
|
Valley
|
Valley | ||||||||
| Freezing Level | Freezing Level |
2100m
|
2100m
|
2000m
|
1900m
|
2000m
|
2100m
|
2200m
|
2200m
|
Additional weather information
Meteorologist's view
A fine day for any outdoor activities in the park, UV levels remaining high so sun protection advisable.
Weather
Dry and clear during the early hours, with a few mist or fog patches through the valleys. Plenty of sunshine through the day, with some fair weather cloud bubbling up during the afternoon, with high cloud turning sunshine hazy at times.
Chance of cloud-free hill tops
>95%.
Low cloud and visibility
Some mist and shallow fog in the valleys at first this should quickly clear. Beyond this no low level cloud or visibility issues are expected with excellent visibilities expected and views of distant peaks possible.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A cloudier start to the day but this is likely to lift and break through the morning to fine conditions with bright or sunny skies and some scattered showers, which may turn heavy later on in the day. A moderate easterly breeze.
Chance of cloud-free hill tops
40% rising to 90% through the morning.
Maximum wind speed expected
Easterly 25 mph.
Temperature
- At 800m plus 8 Celsius, rising to plus 14 Celsius.
- Valley plus 15 Celsius, rising to plus 21 Celsius.
- Freezing level above summits.
Low cloud and visibility
Widespread cloud bases above 700-800m initially with some patchy amount with bases above 500-600m. This is expected to lift and clear leaving all cloud bases above summits through the afternoon. Poor or very poor visibilities in cloud initially but very good or excellent visibilities away from this. Visibilities ay drop to moderate briefly during showers through the afternoon.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 26 Aug
Sunshine and heavy showers, perhaps thundery at first. A moderate southeasterly wind.
Thu 27 Aug
Showers or longer spells of heavy rain, once again potentially thundery at times. Potentially turning quite windy but confidence on the details are low at this stage.
Fri 28 Aug
Another unsettled day ahead with showers or heavy spells of rain likely with widely windy conditions. However low confidence in details around heaviest rain currently.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations