Mountain weather
Eryri / Snowdonia Mountain weather forecast table
Confidence
High confidence for remaining unsettled and turning colder but lower for details of any brighter or clearer spells Please note we are aware of an issue affecting forecast wind speeds and gusts for higher-elevation sites (typically above 500m) displayed on the Met Office website and app. The winds shown here in our Mountain Area Forecasts are not affected by this. Our teams are actively working to correct the issue and updates will be deployed as soon as possible.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Severe Chill Effect
Wind significantly lowers the ‘feels-like’ temperature relative to the actual temperature, with even moderate winds significantly adding to the chilling effect. Strong winds can result in a severe and debilitating wind chill many degrees below the actual temperature. This effect will be enhanced in rain or wet snow. Without protection, prolonged exposure could result in frost nip or frostbite on exposed parts of the body and/or hypothermia.
Poor Visibility
Poor visibility presents challenging route finding conditions. Visibility could be significantly less than 50 metres in all directions with few or no visual references, especially on featureless moors or plateaux. Distances become hard to judge and cliff or cornice edges can be difficult to recognise. These conditions require good navigational skills. There is a risk of white-out conditions when mist or fog is combined with extensive snow cover.
Gales
Gale force winds (gusts over 50mph) make walking difficult and strenuous with a potential to be blown over by gusts. There is often a marked increase in winds through cols or on exposed ridges and summits. Distances can take longer to cover and compass bearings become harder to follow accurately.
Mountain weather forecast
Rather cloudy with, especially in east, occasional rain. Strengthening winds
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
Chance of precipitation (at 800m) |
30% | 30% | 40% | 40% | 30% | 30% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
E
36
|
E
35
|
E
38
|
E
42
|
E
45
|
E
47
|
| 600m |
E
18
|
SE
20
|
SE
25
|
E
30
|
E
32
|
E
34
|
| 300m |
SE
14
|
SE
15
|
SE
16
|
SE
20
|
E
22
|
E
24
|
| Valley |
SE
14
|
SE
15
|
SE
15
|
SE
20
|
E
21
|
E
23
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m | 43 | 41 | 46 | 51 | 54 | 58 |
| 600m | 31 | 31 | 35 | 40 | 44 | 46 |
| 300m | 29 | 29 | 31 | 37 | 40 | 43 |
| Valley | 29 | 29 | 30 | 36 | 39 | 41 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
1°
|
1°
|
1°
|
1°
|
0°
|
0°
|
| 600m |
3°
|
3°
|
3°
|
3°
|
2°
|
2°
|
| 300m |
5°
|
5°
|
6°
|
6°
|
5°
|
4°
|
| Valley |
6°
|
6°
|
8°
|
8°
|
6°
|
6°
|
| Freezing Level |
1,100m
|
1,100m
|
1,000m
|
1,000m
|
1,000m
|
900m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
-7°
|
-7°
|
-8°
|
-8°
|
-9°
|
-10°
|
| 600m |
-2°
|
-3°
|
-3°
|
-4°
|
-5°
|
-6°
|
| 300m |
1°
|
1°
|
2°
|
1°
|
0°
|
-2°
|
| Valley |
2°
|
2°
|
4°
|
3°
|
2°
|
0°
|
Additional weather information
Meteorologist's view
Frozen surfaces to start the day. Significant chill effect increasing through the day as winds increase, gusts around 60mph over ridges and summits, and perhaps western downslopes.
Weather
Mostly cloudy with patchy rain or drizzle in east, falling as sleet or snow on highest summits. Frozen surfaces possible to low levels at first. Then a mostly cloudy day, although western hills may see some bright, or perhaps even sunny, spells with occasional light rain and drizzle, mainly over eastern hills falling increasingly as snow above about 750m. Cloudy through the evening with further light rain and drizzle, this turning increasingly to snow above about 600m.
Chance of cloud-free hill tops
Little chance in east, but around 25% in west
Low cloud and visibility
Periods or persistent cloud above 450-600m in east, with patches below, but in the west cloud more occasional above 600-750m at times. Away from cloud visibility good, falling in rain and drizzle, and perhaps poor in snow.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Cloudy with patchy rain and, above about 600m, snow becoming more persistent later. Feeling very cold in the strong easterly winds.
Chance of cloud-free hill tops
Little chance.
Maximum wind speed expected
Easterly 30-40mph, with gusts around 50mph over ridges and summits, easing in the afternoon and evening.
Temperature
- At 800m Around minus 1 Celsius, rising above zero in evening
- Valley Around plus 2 or 3 Celsius at dawn rising to 5 Celsius by day
- Freezing level Around 600m, rising above summits in evening
Low cloud and visibility
Periods or persistent cloud above 450-600m, with patches below, but in the west cloud more occasional above 600-750m at times in the afternoon. Away from cloud visibility good, falling in rain, drizzle and sleet, and perhaps poor in snow.
Mountain weather information
Wed 4 Feb
Sunrise:
Sunset:
Cloudy with, especially for eastern hills, occasional rain and summit snow, becoming drier and clearer in evening. Fresh easterly winds turning more southerly and easing. Freezing level just above summits.
Thu 5 Feb
Sunrise:
Sunset:
Bright morning, and perhaps afternoon in the west, becoming mostly cloudy again with, especially in east, patchy rain and snow. Winds becoming easterly and strengthening. Freezing level falling to 600m.
Fri 6 Feb
Sunrise:
Sunset:
Cold with some brightness in west but generally rather cloudy with, mainly in east, patchy sleet and snow, perhaps becoming more persistent later. Strong easterly winds easing. Freezing level 300-450m.
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.