
Eryri / Snowdonia Mountain weather forecast table
Confidence
High for cold conditions on Wednesday and Thursday but some uncertainty in cloud amounts. Low confidence for Thursday evening, Friday and the weekend for the progress of fronts arriving from the southwest.
This evening forecast
Dry and cloudy. Extensive cloud and fog above 400m giving difficult conditions for navigation. Strong easterly winds at height and feeling bitterly cold with a severe wind chill.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Severe Chill Effect
Poor Visibility
Mountain weather forecast
Mainly dry but feeling bitterly cold with strong easterly winds on the tops.
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
Weather (at 800m) |
|
|
|
|
|
|
|
|
Chance of precipitation (at 800m) |
10% | 10% | 10% | 10% | 10% | 10% | 10% | 10% |
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
900m |
E
28
|
E
28
|
E
26
|
E
25
|
E
23
|
E
19
|
E
22
|
E
21
|
600m |
E
14
|
E
15
|
E
15
|
E
15
|
E
17
|
E
14
|
E
13
|
E
14
|
300m |
E
9
|
E
10
|
E
12
|
E
11
|
E
15
|
E
12
|
E
11
|
E
11
|
Valley |
E
9
|
E
10
|
E
12
|
E
11
|
E
15
|
E
12
|
E
11
|
E
12
|
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
900m | 34 | 34 | 33 | 32 | 30 | 25 | 28 | 28 |
600m | 22 | 23 | 25 | 23 | 25 | 21 | 22 | 23 |
300m | 18 | 19 | 22 | 21 | 24 | 20 | 21 | 21 |
Valley | 18 | 19 | 22 | 20 | 24 | 20 | 20 | 21 |
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
900m |
-2°
|
-2°
|
-2°
|
-2°
|
-2°
|
-2°
|
-2°
|
-2°
|
600m |
0°
|
0°
|
0°
|
0°
|
1°
|
1°
|
1°
|
0°
|
300m |
2°
|
2°
|
2°
|
2°
|
3°
|
4°
|
3°
|
2°
|
Valley |
4°
|
4°
|
3°
|
4°
|
5°
|
5°
|
4°
|
4°
|
Freezing Level |
600m
|
500m
|
500m
|
500m
|
500m
|
600m
|
600m
|
500m
|
00:00 | 03:00 | 06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|---|---|
900m |
-10°
|
-11°
|
-11°
|
-10°
|
-10°
|
-9°
|
-9°
|
-10°
|
600m |
-6°
|
-6°
|
-6°
|
-6°
|
-6°
|
-4°
|
-4°
|
-6°
|
300m |
-1°
|
-2°
|
-2°
|
-2°
|
-1°
|
0°
|
-1°
|
-2°
|
Valley |
0°
|
0°
|
-1°
|
0°
|
1°
|
2°
|
1°
|
0°
|
Additional weather information
Meteorologist's view
The easterly airstream affecting the UK maintains cold conditions in the hills but there should be a little more brightness on offer than on Tuesday. Be prepared for icy surfaces above the freezing level.
Weather
Mostly cloudy overnight with the odd light wintry shower. A largely dry day with bright or sunny intervals developing in the afternoon. An isolated wintry shower is possible.
Chance of cloud-free hill tops
10% becoming 60% by afternoon.
Low cloud and visibility
Areas of cloud and fog above 400 or 500m overnight and to start the morning. Cloud slowly lifting with just patches above 700m by the afternoon. Good visibility below the cloud base with brief reductions in any showers.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Mainly cloudy overnight with isolated wintry showers. A dry day with bright or sunny spells but a chance of some rain, sleet or snow arriving from the southwest late in the evening. Feeling very cold throughout.
Chance of cloud-free hill tops
Generally 80%, but 40% in early hours of morning and late evening.
Maximum wind speed expected
Easterly or southeasterly 20 to 25mph gusts 35mph, increasing to 30mph gusts 45mph later. Severe wind chill.
Temperature
- At 800m Minus 3C.
- Valley Plus 1C to 2C, rising to 4 or 5C.
- Freezing level 200 to 400m.
Low cloud and visibility
Mostly excellent visibility but patchy cloud above 500m in early hours of morning and late evening.
Mountain weather information
Fri 14 Feb
Cloudy with outbreaks of sleet or snow, turning to rain at most elevations. Bitterly cold conditions with strong southeasterly winds. Freezing level 200 to 400m, rising above summits.
Sat 15 Feb
Low confidence. Expected to be largely cloudy with patchy rain or summit snow. Very cold with strong to gale force southeast winds.
Sun 16 Feb
It is likely to remain cold and breezy. Any rain or snow is expected to move away west again to leave dry conditions.
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.