Mountain weather
Eryri / Snowdonia Mountain weather forecast table
Confidence
High confidence for mild and settled conditions to start the week. Turning windier by midweek with some colder conditions towards the end of the week. Strong winds continuing by the end of the week with significant windchill likely. Uncertainty in timings of any rain and showers.
This evening forecast
A cloudy evening especially for hills further east, but dry for all areas with light northeasterly winds.
Mountain weather forecast
Any early mist will lift to leave lovely Spring day with plenty of sunshine, winds turning from northeast to westerly in the morning.
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 800m) |
<05% | <05% | <05% | <05% | <05% | <05% | <05% | <05% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
NE
17
|
N
10
|
N
8
|
N
5
|
NW
6
|
W
10
|
W
14
|
W
15
|
| 600m |
N
8
|
N
6
|
N
6
|
N
4
|
NW
7
|
W
9
|
W
7
|
SW
9
|
| 300m |
N
5
|
N
4
|
NW
3
|
N
2
|
NW
6
|
W
7
|
W
3
|
SW
5
|
| Valley |
N
4
|
NW
3
|
NW
3
|
NW
3
|
NW
6
|
NW
7
|
W
3
|
SW
6
|
Wind gust (mph)
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m | 21 | 14 | 10 | 7 | 10 | 14 | 17 | 19 |
| 600m | 11 | 8 | 8 | 6 | 11 | 13 | 10 | 12 |
| 300m | 8 | 7 | 6 | 4 | 9 | 11 | 7 | 11 |
| Valley | 7 | 6 | 4 | 5 | 10 | 11 | 7 | 12 |
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
4°
|
3°
|
3°
|
4°
|
5°
|
6°
|
4°
|
3°
|
| 600m |
6°
|
5°
|
4°
|
6°
|
7°
|
8°
|
6°
|
5°
|
| 300m |
7°
|
6°
|
4°
|
6°
|
10°
|
10°
|
8°
|
6°
|
| Valley |
7°
|
6°
|
5°
|
7°
|
10°
|
10°
|
8°
|
7°
|
| Freezing Level |
1,600m
|
1,600m
|
1,600m
|
1,600m
|
1,600m
|
1,400m
|
1,200m
|
1,800m
|
Altitude above mean sea level
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
-1°
|
0°
|
0°
|
3°
|
2°
|
2°
|
0°
|
-2°
|
| 600m |
3°
|
3°
|
2°
|
4°
|
5°
|
5°
|
4°
|
2°
|
| 300m |
5°
|
5°
|
3°
|
6°
|
8°
|
9°
|
7°
|
4°
|
| Valley |
6°
|
6°
|
4°
|
6°
|
9°
|
9°
|
8°
|
6°
|
Additional weather information
Meteorologist's view
Nothing to add.
Weather
Dry overnight, perhaps some mist and the odd fog patch developing but generally clear and dry. Any mist will lift to leave a bright and sunny spring day. Winds turning westerly in the afternoon and freshening, cloud increasing from the north in the evening with some late evening showers possible.
Chance of cloud-free hill tops
95%, perhaps patchy cloud in the morning, cloud increasing in the evening.
Low cloud and visibility
Patches of cloud above 700m will lift and burn away in the morning but mainly clear summits for the whole day with very good visibility. Cloud thickening during the evening with scattered cloud above 600m by late evening as some outbreaks of rain move in, visibility likely to become moderate later in the evening too.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
A few showers in the early hours and a risk of some fog at the start of the day. Brightening up with a sunny day likely and mainly dry during daylight hours, fresh northwesterly winds will give quite a cool feel to the day.
Chance of cloud-free hill tops
90%, some early morning patchy cloud
Maximum wind speed expected
Northwesterly 10-15 mph with gust 20-25mph.
Temperature
- At 800m Plus 3 rising to 8 Celsius.
- Valley Plus 8 rising to 12 Celsius.
- Freezing level Above all summits.
Low cloud and visibility
Patchy cloud above 600m in the morning, mostly lifting and clearing by lunchtime. Visibility may be moderate or poor in the morning in mist or very poor in any fog patches, during the day visibility is likely to be very good with far reaching view.
Mountain weather information
Wed 26 Mar
Sunrise:
Sunset:
Strong southwesterly winds but a mainly dry morning, a cloudy day with the risk of a few afternoon showers. Freezing level above all summits.
Thu 27 Mar
Sunrise:
Sunset:
Cloudy with some outbreaks of rain in the afternoon, strong southwesterly winds, visibility may be poor at times around western mountains. Feeling cooler again with freezing level around 800m in the morning rising above summits in the afternoon, some showers may be wintery on the higher tops.
Fri 28 Mar
Sunrise:
Sunset:
Unsettled with outbreaks of rain, maybe turning wintery on higher mountains as freezing level falls below 1000m for a time, strong westerly winds may be a hazard and will add to the chill effect.
Updated at:
Summit specific forecast
Mountain summit forecast map
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Key
Mountain summits
Other points of interest
Cluster of multiple stations
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.