Mountain weather
Eryri / Snowdonia Mountain weather forecast table
Confidence
High for remaining unsettled, but lower for details, especially from Tuesday. 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.
Mountain weather forecast
Rather cloudy with outbreaks of rain, summit snow. Winds easing
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
Chance of precipitation (at 800m) |
20% | 10% | 80% | 30% | 50% | 10% |
Wind direction and speed (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
SW
14
|
SW
14
|
SW
14
|
NW
16
|
NW
15
|
N
9
|
| 600m |
S
10
|
S
10
|
SW
11
|
NW
11
|
NW
9
|
N
4
|
| 300m |
S
6
|
S
6
|
SW
7
|
NW
8
|
NW
5
|
SW
2
|
| Valley |
S
6
|
S
6
|
SW
7
|
NW
8
|
NW
5
|
SW
2
|
Wind gust (mph)
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m | 17 | 17 | 17 | 19 | 18 | 11 |
| 600m | 13 | 13 | 14 | 15 | 12 | 7 |
| 300m | 13 | 11 | 12 | 13 | 11 | 6 |
| Valley | 13 | 11 | 12 | 13 | 11 | 6 |
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
2°
|
2°
|
2°
|
0°
|
0°
|
0°
|
| 600m |
4°
|
4°
|
4°
|
2°
|
2°
|
2°
|
| 300m |
5°
|
6°
|
6°
|
4°
|
4°
|
4°
|
| Valley |
6°
|
7°
|
7°
|
6°
|
5°
|
5°
|
| Freezing Level |
1,100m
|
1,100m
|
1,100m
|
800m
|
900m
|
900m
|
Altitude above mean sea level
| Time | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|
| 900m |
-3°
|
-3°
|
-3°
|
-6°
|
-5°
|
-4°
|
| 600m |
0°
|
0°
|
0°
|
-2°
|
-2°
|
0°
|
| 300m |
3°
|
4°
|
4°
|
1°
|
2°
|
3°
|
| Valley |
4°
|
5°
|
5°
|
3°
|
3°
|
4°
|
Additional weather information
Meteorologist's view
Significant chill expected despite easing winds.
Weather
A rather cloudy morning with a few spots of rain but becoming brighter for a time before cloud increases again towards midday bringing outbreaks of occasionally heavy rain, with snow above about 800-900m, in the early afternoon. The rain and snow become patchier through the afternoon with clear spells developing in the evening.
Chance of cloud-free hill tops
40% through the middle of the morning and again this evening, little chance from early afternoon.
Low cloud and visibility
Occasional cloud above 450-650m for a time in the morning and again in the afternoon. Away from cloud visibility generally rather hazy in rain and perhaps poor in snow.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Mainly dry with clear spells through the early hours. Then a rather cloudy day, best of any brighter spells in the west, with patchy light rain and drizzle, with some snow above about 750m.
Chance of cloud-free hill tops
Near nil around dawn becoming 60% by afternoon increasing 30% by evening.
Maximum wind speed expected
Easterly 10mph or less increasing 30-40mph through the morning, with gusts around 45-50mph over ridges and summits.
Temperature
- At 800m Around plus 1 Celsius
- Valley Around Zero Celsius at dawn rising to plus 6 or 7 Celsius by day
- Freezing level 900m
Low cloud and visibility
Periods or persistent cloud above 450-600m, but more occasional at times above 600-750m for western hills. Away from cloud visibility rather hazy or good, falling to hazy in rain and perhaps poor in snow.
Mountain weather information
Tue 3 Feb
Sunrise:
Sunset:
Mostly cloudy with outbreaks of rain, sleet and snow, best of any brighter spells in west. Strong easterly winds, with summit gales, easing later. Freezing level falling to 600m for a time.
Wed 4 Feb
Sunrise:
Sunset:
Rather cloudy with outbreaks of rain and summit snow, some brighter, drier spells in west. Occasionally fresh easterly winds veering more southerly. Freezing level just above the summits.
Thu 5 Feb
Sunrise:
Sunset:
Cloudy and mostly dry. Strengthening easterly winds, summit gales possible. Freezing level just above summits.
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.