Mountain weather
Eryri / Snowdonia
Confidence
High for an unsettled period, and for a wet day on Monday, but lower with the timing and extent of the heaviest rainfall.
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This eveningSunrise:Sunset:
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Mon 1 JunSunrise:Sunset:
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Tue 2 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.
Poor Visibility
Heavy Persistent Rain
Severe Chill Effect
Thunderstorms
Mountain weather forecast
Heavy and persistent rain, thundery later.
|
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 |
60%
|
60%
|
60%
|
80%
|
80%
|
90%
|
90%
|
90%
|
Wind direction and speed
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | SW 28mph knots
SW
28mph |
S 32mph knots
S
32mph |
S 37mph knots
S
37mph |
SW 30mph knots
SW
30mph |
SW 30mph knots
SW
30mph |
S 33mph knots
S
33mph |
SW 29mph knots
SW
29mph |
SW 27mph knots
SW
27mph |
|
600m
|
600m | SW 20mph knots
SW
20mph |
S 23mph knots
S
23mph |
S 23mph knots
S
23mph |
S 21mph knots
S
21mph |
SW 21mph knots
SW
21mph |
S 23mph knots
S
23mph |
S 20mph knots
S
20mph |
SW 18mph knots
SW
18mph |
|
300m
|
300m | S 12mph knots
S
12mph |
S 16mph knots
S
16mph |
S 14mph knots
S
14mph |
S 14mph knots
S
14mph |
S 14mph knots
S
14mph |
S 16mph knots
S
16mph |
S 13mph knots
S
13mph |
S 12mph knots
S
12mph |
|
Valley
|
Valley | S 12mph knots
S
12mph |
S 16mph knots
S
16mph |
S 14mph knots
S
14mph |
S 13mph knots
S
13mph |
S 14mph knots
S
14mph |
S 15mph knots
S
15mph |
S 13mph knots
S
13mph |
S 11mph knots
S
11mph |
Wind gust
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 33mph | 38mph | 44mph | 37mph | 37mph | 40mph | 36mph | 34mph |
|
600m
|
600m | 25mph | 29mph | 30mph | 27mph | 27mph | 30mph | 27mph | 24mph |
|
300m
|
300m | 21mph | 27mph | 27mph | 24mph | 24mph | 28mph | 23mph | 21mph |
|
Valley
|
Valley | 21mph | 27mph | 26mph | 23mph | 23mph | 27mph | 23mph | 21mph |
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 8 degrees Celsius 8°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C |
|
600m
|
600m | 10 degrees Celsius 10°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C |
|
300m
|
300m | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 13 degrees Celsius 13°C |
|
Valley
|
Valley | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C | 14 degrees Celsius 14°C | 14 degrees Celsius 14°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 15 degrees Celsius 15°C | 14 degrees Celsius 14°C |
| Freezing Level | Freezing Level |
2700m
|
2900m
|
2900m
|
2900m
|
3000m
|
2900m
|
2800m
|
2500m
|
|
Time
|
Time |
00:00
|
03:00
|
06:00
|
09:00
|
12:00
|
15:00
|
18:00
|
21:00
|
|---|---|---|---|---|---|---|---|---|---|
|
900m
|
900m | 4 degrees Celsius 4°C | 3 degrees Celsius 3°C | 4 degrees Celsius 4°C | 5 degrees Celsius 5°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C | 6 degrees Celsius 6°C |
|
600m
|
600m | 7 degrees Celsius 7°C | 6 degrees Celsius 6°C | 7 degrees Celsius 7°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C | 9 degrees Celsius 9°C | 8 degrees Celsius 8°C |
|
300m
|
300m | 10 degrees Celsius 10°C | 9 degrees Celsius 9°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C | 11 degrees Celsius 11°C |
|
Valley
|
Valley | 11 degrees Celsius 11°C | 10 degrees Celsius 10°C | 11 degrees Celsius 11°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 12 degrees Celsius 12°C | 13 degrees Celsius 13°C | 13 degrees Celsius 13°C |
| Freezing Level | Freezing Level |
2700m
|
2900m
|
2900m
|
2900m
|
3000m
|
2900m
|
2800m
|
2500m
|
Additional weather information
Meteorologist's view
A very wet day with persistent poor visibilities.
Weather
Rain, heavy at times, will move in through the early morning, and then persist for much of Monday. By the afternoon, this has chance of turning thundery with heavy downpours leading to the risk of some drenching conditions.
Chance of cloud-free hill tops
10%
Low cloud and visibility
Extensive cloud will obscure tops above 400m in the west. However heavier bursts of rain will likely be accompanied by cloud lowering further to around 400m. Outside of cloud visibility will be very poor for much of the day due to the rain.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Heavy, thundery rain clearing through the early hours, followed by frequent heavy, thundery showers. Some drier and brighter interludes.
Chance of cloud-free hill tops
40% soon to 70%
Maximum wind speed expected
Southwesterly 20-30mph.
Temperature
- At 800m Plus 8 Celsius rising to plus 10 Celsius.
- Valley Plus 11 Celsius rising to plus 14 Celsius.
- Freezing level Above summits.
Low cloud and visibility
Patchy low cloud down to 500m, but lifting above summits by the afternoon. Cloud lowering in heavy downpours. Generally good visibilities outside showers, poor within cloud and rain.
Ground conditions
No recent ground conditions report available.
Mountain weather information
Wed 3 Jun
Showers briefly easing early Wednesday, before cloud and rain thickens from the southwest from around midday. Winds also strengthening, especially over highest summits.
Thu 4 Jun
Sunny spells and scattered showers, heavy at times. Strong southwesterly winds continuing, leading to summits feeling close to freezing.
Fri 5 Jun
A few showers but mostly dry. Feeling much cooler with brisk southwestlery winds.
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.