Mountain weather
Eryri / Snowdonia
Confidence
High for a settled weekend with winds gradually easing. Moderate to low in terms of rain and shower details next week.
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Sat 13 JunSunrise:Sunset:
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Sun 14 JunSunrise:Sunset:
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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
Dry but rather cloudy and breezy. Warm.
|
Time
|
Time |
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%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | W 32mph knots
W
32mph |
W 27mph knots
W
27mph |
W 25mph knots
W
25mph |
W 25mph knots
W
25mph |
W 20mph knots
W
20mph |
W 21mph knots
W
21mph |
|
600m
|
600m | W 23mph knots
W
23mph |
W 21mph knots
W
21mph |
W 20mph knots
W
20mph |
W 20mph knots
W
20mph |
W 16mph knots
W
16mph |
W 11mph knots
W
11mph |
|
300m
|
300m | W 16mph knots
W
16mph |
W 16mph knots
W
16mph |
W 16mph knots
W
16mph |
W 14mph knots
W
14mph |
W 10mph knots
W
10mph |
W 5mph knots
W
5mph |
|
Valley
|
Valley | W 16mph knots
W
16mph |
W 16mph knots
W
16mph |
W 16mph knots
W
16mph |
W 15mph knots
W
15mph |
W 10mph knots
W
10mph |
W 6mph knots
W
6mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 38mph | 33mph | 32mph | 32mph | 26mph | 25mph |
|
600m
|
600m | 28mph | 27mph | 27mph | 27mph | 21mph | 15mph |
|
300m
|
300m | 25mph | 25mph | 24mph | 23mph | 16mph | 11mph |
|
Valley
|
Valley | 25mph | 25mph | 24mph | 23mph | 16mph | 12mph |
|
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 |
1500m
|
1700m
|
1800m
|
1700m
|
1700m
|
1900m
|
Additional weather information
Meteorologist's view
Expect mean winds and gusts to be around 10 mph stronger than those in the table above on some ridges and over the highest summits. These winds will give considerable buffeting and making walking difficult at times. Despite it feeling quite chilly on the highest summits, very high UV levels are expected through the middle of the day, so sun protection should be considered.
Weather
A dry but rather cloudy start to the weekend. Cloud will become more extensive through the morning and persist for much of the day, though tending to lift into brighter layers. Breezy at lower levels, but windy over summits.
Chance of cloud-free hill tops
80% rapidly becoming 100%..
Low cloud and visibility
Periods of cloud above 750-800m first thing, mainly over and to the west of the Snowdon Range. This lifting and breaking to become patches above 950m from mid-morning with most summits clearing by midday. Generally very good visibility with excellent air clarity and distant views of far-away mountains and landmarks but occasionally very poor in cloud/hill fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Another generally fine day with bright skies and periods of hazy sunshine. The outside chance of a spot or two of rain from the thickest cloud but most likely remaining dry.
Chance of cloud-free hill tops
60% becoming 90%.
Maximum wind speed expected
Northerly 10-15 mph, becoming easterly 20 mph by the evening.
Temperature
- At 800m Plus 6 Celsius rising to plus 15 Celsius.
- Valley Plus 8 Celsius rising to plus 21 Celsius.
- Freezing level Well above the summits.
Low cloud and visibility
Patches of cloud above 700m until mid-morning, mainly over the Carneddau. Generally very good visibility with excellent air clarity and distant views of far-away mountains and landmarks but occasionally very poor in cloud/hill fog.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Mon 15 Jun
Most likely remaining dry and warm with a mixture of cloud and bright or sunny spells. A low chance of a shower or thunderstorm later in the day. Moderate to fresh easterly winds on the summits.
Tue 16 Jun
Uncertainty in the details but a cooler day is likely with a greater likelihood of hill fog and scattered showers. A small chance of more general rain, perhaps heavy, developing in places. Winds becoming moderate to fresh southerly or southwesterly.
Wed 17 Jun
Probably rather cloudy with occasional hill fog and rain. Strong southerly or southwesterly winds, with a chance of summit gales.
Mountain weather information
Mon 15 Jun
Most likely remaining dry and warm with a mixture of cloud and bright or sunny spells. A low chance of a shower or thunderstorm later in the day. Moderate to fresh easterly winds on the summits.
Tue 16 Jun
Uncertainty in the details but a cooler day is likely with a greater likelihood of hill fog and scattered showers. A small chance of more general rain, perhaps heavy, developing in places. Winds becoming moderate to fresh southerly or southwesterly.
Wed 17 Jun
Probably rather cloudy with occasional hill fog and rain. Strong southerly or southwesterly winds, with a chance of summit gales.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations