Eryri / Snowdonia Mountain weather forecast table
Confidence
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. High confidence for unsettled, cold and windy conditions throughout this period. Lower for daily rain and snow details, especially from Tuesday.
This evening forecast
Outbreaks of rain, heavy at times with snow above 700m. Very cold with gale force southeast winds, gusts 50-60mph on the tops with a chance of blizzard conditions. Freezing level 900m.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Severe Chill Effect
Poor Visibility
Blizzards
Gales
Mountain weather forecast
Cloudy with patchy rain or snow. Feeling very cold with strong easterly winds.
| 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) |
80% | 80% | 30% | 30% | 30% | 60% | 60% | 20% |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
SE
39
|
S
32
|
SE
32
|
E
33
|
SE
28
|
E
25
|
E
24
|
E
26
|
| 600m |
SE
28
|
S
22
|
SE
20
|
SE
21
|
SE
21
|
E
15
|
E
14
|
E
16
|
| 300m |
SE
20
|
SE
15
|
SE
13
|
SE
13
|
SE
15
|
E
9
|
E
8
|
E
12
|
| Valley |
SE
19
|
SE
15
|
SE
13
|
SE
13
|
SE
15
|
E
9
|
E
7
|
E
11
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m | 48 | 39 | 39 | 40 | 36 | 32 | 31 | 32 |
| 600m | 37 | 29 | 28 | 28 | 28 | 22 | 20 | 26 |
| 300m | 34 | 27 | 25 | 25 | 25 | 18 | 16 | 22 |
| Valley | 33 | 27 | 25 | 24 | 25 | 17 | 14 | 20 |
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
1°
|
1°
|
0°
|
0°
|
0°
|
1°
|
0°
|
0°
|
| 600m |
3°
|
3°
|
2°
|
2°
|
3°
|
3°
|
2°
|
2°
|
| 300m |
5°
|
5°
|
4°
|
4°
|
6°
|
6°
|
4°
|
4°
|
| Valley |
6°
|
7°
|
5°
|
5°
|
7°
|
7°
|
6°
|
5°
|
| Freezing Level |
1,100m
|
1,000m
|
800m
|
900m
|
900m
|
900m
|
1,000m
|
900m
|
| Time | 00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 |
|---|---|---|---|---|---|---|---|---|
| 900m |
-8°
|
-7°
|
-8°
|
-8°
|
-7°
|
-6°
|
-7°
|
-8°
|
| 600m |
-4°
|
-3°
|
-4°
|
-4°
|
-3°
|
-2°
|
-3°
|
-4°
|
| 300m |
0°
|
1°
|
0°
|
0°
|
2°
|
3°
|
2°
|
0°
|
| Valley |
2°
|
3°
|
2°
|
2°
|
4°
|
5°
|
3°
|
1°
|
Additional weather information
Meteorologist's view
A very cold day in the hills, even at modest elevations, with a severe wind chill.
Weather
Rain, with snow above 700m, clearing in the early hours. A largely cloudy and dry day with patchy rain, falling as snow above 700m, mainly during the afternoon and evening.
Chance of cloud-free hill tops
60% becoming 30%.
Low cloud and visibility
Patchy cloud above 600m, mainly during the afternoon, becoming more persistent above 500m in the evening. Away from low cloud, visibility mainly good during the day, occasionally a few kilometres or less in rain or snow. Chance of blizzards on the tops in the early hours.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Mostly dry and cloudy through the day, perhaps the odd spot of rain or snow. Winds will strengthen with rain, sleet and snow arriving in the afternoon or evening but low confidence in timings. Feeling bitterly cold with a severe wind chill.
Chance of cloud-free hill tops
20%.
Maximum wind speed expected
East or SE 20 to 25mph gusts 30mph, increasing 40mph gusts 60mph later on ridges and summits.
Temperature
- At 800m Minus 1 or 2C.
- Valley Plus 5 or 6C.
- Freezing level 600m.
Low cloud and visibility
Rather extensive cloud above 500 or 600m. Otherwise mainly good visibility for most of the day becoming widely poor late in the day with a chance of blizzards on the tops.
Mountain weather information
Tue 27 Jan
Heavy spells of sleet and snow. Severe conditions with southerly gales and blizzards. Becoming brighter with a few wintry showers in the afternoon. Freezing level 400m, rising to 800m later
Wed 28 Jan
Dry and bright start then rain, sleet or snow spreading east later. Strong southerly winds. Freezing level 800m.
Thu 29 Jan
Remaining unsettled and windy with periods of rain or hill snow.
Summit specific forecast
Mountain summit forecast map
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.