Eryri / Snowdonia Mountain weather forecast table
Confidence
High for showery conditions on Friday then confidence in the details decreasing through the weekend so please keep up to date with the forecast.
Mountain weather hazards
Hazards apply at or above 300m, reflecting the more severe conditions which can occur at altitude.
Thunderstorms
Gales
Severe Chill Effect
Poor Visibility
Mountain weather forecast
Showers, some heavy, wintry on the tops. Cold and windy at height.
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
Weather (at 800m) |
||||||
Chance of precipitation (at 800m) |
20% | 30% | 50% | 50% | 50% | 30% |
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
900m |
S
28
|
S
27
|
S
32
|
SW
34
|
SW
37
|
S
35
|
600m |
S
19
|
S
20
|
S
25
|
SW
26
|
SW
25
|
S
24
|
300m |
S
13
|
S
14
|
S
17
|
SW
18
|
S
17
|
S
16
|
Valley |
S
13
|
S
14
|
S
16
|
SW
17
|
S
16
|
S
16
|
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
900m | 33 | 35 | 42 | 45 | 47 | 45 |
600m | 24 | 28 | 35 | 37 | 35 | 34 |
300m | 23 | 24 | 31 | 32 | 31 | 30 |
Valley | 24 | 24 | 28 | 30 | 29 | 29 |
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
900m |
0°
|
1°
|
3°
|
2°
|
2°
|
1°
|
600m |
3°
|
3°
|
5°
|
4°
|
4°
|
3°
|
300m |
5°
|
6°
|
8°
|
7°
|
6°
|
6°
|
Valley |
6°
|
7°
|
9°
|
9°
|
8°
|
7°
|
Freezing Level |
1,000m
|
1,000m
|
1,000m
|
1,100m
|
1,000m
|
1,000m
|
06:00 | 09:00 | 12:00 | 15:00 | 18:00 | 21:00 | |
---|---|---|---|---|---|---|
900m |
-7°
|
-6°
|
-4°
|
-5°
|
-6°
|
-7°
|
600m |
-3°
|
-2°
|
-1°
|
-1°
|
-2°
|
-3°
|
300m |
1°
|
2°
|
4°
|
3°
|
2°
|
1°
|
Valley |
2°
|
4°
|
6°
|
5°
|
4°
|
3°
|
Additional weather information
Meteorologist's view
Strong winds on the tops with gusts of 40 to 50mph on exposed ridges and summits. Feeling cold as you gain height with a significant wind chill.
Weather
A mixture of bright intervals and showers, falling as sleet or snow above 700m. Some showers could be heavy with hail and a chance of lightning. A few showers will continue into the evening with lengthening clear spells.
Chance of cloud-free hill tops
20% becoming 40%. Cloud will come and go from the summits at times.
Low cloud and visibility
Patchy cloud and fog mainly above 700m but locally down to 400m in showers. Outside of low cloud, visibility mainly good, reducing to a few km or less in showers.
Ground conditions
Please see - https://yrwyddfa.live/
Mountain weather information
Weather
Clear spells and patchy mist overnight. This will clear during then morning then a few isolated showers developing, wintry above 800m. Becoming dry with lengthening spells of sunshine in the afternoon then a dry, clear evening.
Chance of cloud-free hill tops
30% at first then becoming 80%.
Maximum wind speed expected
Southerly 20mph gusts 30mph.
Temperature
- At 800m Plus 2C rising to 4C.
- Valley Plus 5C rising to 11C.
- Freezing level 900m, rising above summits in afternoon.
Low cloud and visibility
Areas of low cloud and fog above 500m at first, gradually lifting. Otherwise mostly good visibility with patchy summit fog in showers.
Mountain weather information
Sun 31 Mar
Dry with bright spells but still feeling rather chilly on the tops. Light south-easterly winds. Freezing level above summits.
Mon 1 Apr
Mainly dry but a few isolated showers developing, wintry above 600m. Light southerly winds. Feeling cold on the tops with freezing level 800 or 900m.
Tue 2 Apr
Mainly dry but showers may develop through the afternoon. Freezing level 800m, rising above summits. Light southerly winds.
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.