Mountain weather
Eryri / Snowdonia
Confidence
High for settled and dry weather until later on Saturday. Moderate for height of inversion on Thursday and cloud/fog amounts. Moderate for rain/shower details later in the weekend.
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Thu 23 JulSunrise:Sunset:
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Fri 24 JulSunrise: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
Poor Visibility
Mountain weather forecast
Low cloud at first, lingering for longest in the north, then warm sunny spells.
|
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%
|
<5%
|
<5%
|
<5%
|
Wind direction and speed
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | N 10mph knots
N
10mph |
N 11mph knots
N
11mph |
N 11mph knots
N
11mph |
N 12mph knots
N
12mph |
N 11mph knots
N
11mph |
N 11mph knots
N
11mph |
|
600m
|
600m | N 8mph knots
N
8mph |
N 9mph knots
N
9mph |
N 10mph knots
N
10mph |
N 12mph knots
N
12mph |
N 10mph knots
N
10mph |
N 4mph knots
N
4mph |
|
300m
|
300m | N 5mph knots
N
5mph |
N 7mph knots
N
7mph |
N 8mph knots
N
8mph |
N 9mph knots
N
9mph |
N 7mph knots
N
7mph |
NW 3mph knots
NW
3mph |
|
Valley
|
Valley | NW 5mph knots
NW
5mph |
N 7mph knots
N
7mph |
N 8mph knots
N
8mph |
N 10mph knots
N
10mph |
N 8mph knots
N
8mph |
NW 3mph knots
NW
3mph |
Wind gust
|
Time
|
Time |
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|
|
900m
|
900m | 12mph | 14mph | 14mph | 16mph | 14mph | 15mph |
|
600m
|
600m | 10mph | 13mph | 14mph | 16mph | 13mph | 9mph |
|
300m
|
300m | 7mph | 10mph | 11mph | 14mph | 11mph | 7mph |
|
Valley
|
Valley | 8mph | 10mph | 11mph | 14mph | 11mph | 7mph |
|
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 |
2900m
|
2800m
|
2800m
|
3000m
|
3000m
|
2800m
|
Additional weather information
Meteorologist's view
There is the potential for summits to poke through the cloud sheet, especially around dawn until mid-morning with ranges such as the Carneddau most likely to be clear, however there is uncertainty regarding the height of the cloud tops and how quickly they rise this morning. Foggy conditions will make for difficult navigation at times through the morning. Long periods of strong sunshine developing with high or very high UV levels so remember to protect your skin.
Weather
High cloud for many areas at first, plus areas of low cloud and hill fog mainly across the north of the park. Sunny spells develop across southern areas this morning. Then becoming warm this afternoon for all areas and mostly sunny, although the sunshine will be hazy at times. Dry and largely clear this evening.
Chance of cloud-free hill tops
40% for northern areas at first, although 70% above 900m with the highest summits probably poking above a temperature inversion and a layer of cloud. Initially 80% across southern areas. Becoming widely 90% later in the day.
Low cloud and visibility
Areas of cloud above 200-300m across the north of the park, though patchy across the south and locally cloud-free south of Beddgelert. Higher tops probably above cloud first thing but clouds lifting to cover some summits for a time this morning. Chance of patchy cloud above 950m this afternoon. Very good visibility in general but very poor in cloud/fog.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Cloudy with spots of drizzle possible until mid-morning, then dry with sunny intervals developing, these increasingly prolonged during the afternoon.
Chance of cloud-free hill tops
70% but 40% Yr Wyddfa range until midday.
Maximum wind speed expected
Westerly 15 mph
Temperature
- At 800m Plus 11 Celsius rising to plus 17 Celsius.
- Valley Plus 9 Celsius rising to plus 23 Celsius.
- Freezing level Above the summits.
Low cloud and visibility
Periods above 700-800m through the morning, with patches down to 500m in the west and north. Lifting to periods above 900m through the afternoon. Very good visibility in general but very poor in cloud/fog.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Sat 25 Jul
After a bright start turning increasingly cloudy with a chance of occasional light showers. More persistent spells of rain are likely to arrive by the end of the day. Periods of hill fog becoming more extensive as the day progresses. Westerly winds freshening later.
Sun 26 Jul
Generally cloudy with patchy hill fog possible, mainly in the west. Rain at first then scattered light showers, these dying away later in the day. Brightening up in the east with sunny intervals. Moderate westerly winds.
Mon 27 Jul
Probably increasing amounts of cloud, with a chance of patchy light rain and drizzle, and hill fog developing. Light to moderate westerly winds.
Mountain weather information
Sat 25 Jul
After a bright start turning increasingly cloudy with a chance of occasional light showers. More persistent spells of rain are likely to arrive by the end of the day. Periods of hill fog becoming more extensive as the day progresses. Westerly winds freshening later.
Sun 26 Jul
Generally cloudy with patchy hill fog possible, mainly in the west. Rain at first then scattered light showers, these dying away later in the day. Brightening up in the east with sunny intervals. Moderate westerly winds.
Mon 27 Jul
Probably increasing amounts of cloud, with a chance of patchy light rain and drizzle, and hill fog developing. Light to moderate westerly winds.
Summit specific forecast
Mountain summits
Other points of interest
Cluster of multiple stations