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Afbeelding - Unterwasser
© Toggenburg Tourismus: swiss-image.ch

What is the weather like in Unterwasser in Switzerland, and what is the forecast for the next few days? Check the current weather forecast for Unterwasser on this page. Here, you will find the weather forecast for the next 48 hours as well as the next 14 days, so you’ll know exactly what to expect and what the weather will be like in Unterwasser during your winter holiday.

The weather in Unterwasser

On this page, you will find the current weather forecast for Unterwasser, located in the ski resort of Toggenburg in Switzerland. Check the forecast and temperature for both the valley and the mountain. This will help you see what conditions will be like on the slopes and whether you need to add an extra layer for the day’s skiing. Will snow be in the forecast, or will the sun be shining? And what about the wind? How high is the frost line (0-degree limit), and what is the current snow depth in Unterwasser? Read on for all this information!

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48-hour weather forecast for Unterwasser

14 December 2025

Night

Expectation 0 mm

0-degree limit 2610 metres

Fairly cloudless

1°C

Zo 2
Morning

Expectation 0 mm

0-degree limit 2640 metres

Bright sunny weather

2°C

Zo 1
Midday

Expectation 0 mm

0-degree limit 2760 metres

Bright sunny weather

7°C

Zo 1
Evening

Expectation 0 mm

0-degree limit 2823 metres

Fairly cloudless

3°C

Z 2

15 December 2025

Night

Expectation 0 mm

0-degree limit 2863 metres

Fairly cloudless

2°C

Z 2
Morning

Expectation 0 mm

0-degree limit 2733 metres

Regular sunshine with some clouds

4°C

Zzo 2
Midday

Expectation 0 mm

0-degree limit 2773 metres

Regular sunshine with some clouds

8°C

Zzo 2
Evening

Expectation 0 mm

0-degree limit 2761 metres

Overcast

6°C

Zzo 4

14 December 2025

Night

Expectation 0 mm

0-degree limit 2605 metres

Fairly cloudless

-4°C

Zzw 5
Morning

Expectation 0 mm

0-degree limit 2657 metres

Bright sunny weather

-2°C

Zzw 4
Midday

Expectation 0 mm

0-degree limit 2761 metres

Bright sunny weather

0°C

Z 5
Evening

Expectation 0 mm

0-degree limit 2817 metres

Fairly cloudless

-2°C

Z 7

15 December 2025

Night

Expectation 0 mm

0-degree limit 2861 metres

Fairly cloudless

-2°C

Z 8
Morning

Expectation 0 mm

0-degree limit 2629 metres

Regular sunshine with some clouds

-1°C

Z 8
Midday

Expectation 0 mm

0-degree limit 2584 metres

Regular sunshine with some clouds

0°C

Z 7
Evening

Expectation 0 mm

0-degree limit 2607 metres

Overcast

-1°C

Zzo 7

14-day weather forecast for Unterwasser

Date

Weather and snow

Expectation

Wind

Frost line

Date

Weather and snow

Expectation

Wind

Frost line

14 December 2025
Bright sunny weather
0°C / 7°C
0 mm
Zzo 2

2550 metres

Date

Weather and snow

Expectation

Wind

Frost line

15 December 2025
Regular sunshine with some clouds
2°C / 8°C
0 mm
Zzo 3

2658 metres

Date

Weather and snow

Expectation

Wind

Frost line

16 December 2025
Extensive cloud cover, hardly any sun
5°C / 9°C
0 mm
Zzo 4

2459 metres

Date

Weather and snow

Expectation

Wind

Frost line

17 December 2025
Regular sunshine with some clouds
4°C / 8°C
0 mm
Z 2

2142 metres

Date

Weather and snow

Expectation

Wind

Frost line

18 December 2025
Bright sunny weather
3°C / 7°C
0 mm
Zzo 3

2159 metres

Date

Weather and snow

Expectation

Wind

Frost line

19 December 2025
Regular sunshine with some clouds
3°C / 8°C
1 mm
Zzo 3

2248 metres

Date

Weather and snow

Expectation

Wind

Frost line

20 December 2025
Showers with occasional sunshine
3°C / 6°C
1 mm
Z 2

1819 metres

Date

Weather and snow

Expectation

Wind

Frost line

21 December 2025
Regular sunshine with some clouds
2°C / 6°C
1 mm
Zzo 2

1618 metres

Date

Weather and snow

Expectation

Wind

Frost line

22 December 2025
Regular sunshine with some clouds
1°C / 5°C
1 mm
Nw 2

1277 metres

Date

Weather and snow

Expectation

Wind

Frost line

23 December 2025
Wet snow with some sunshine
1°C / 4°C
1 mm
Zo 2

1114 metres

Date

Weather and snow

Expectation

Wind

Frost line

24 December 2025
Wet snow with some sunshine
-1°C / 4°C
1 mm
Zzo 2

840 metres

Date

Weather and snow

Expectation

Wind

Frost line

25 December 2025
Snow showers with some sunshine
-1°C / 4°C
1 cm
Nnw 2

870 metres

Date

Weather and snow

Expectation

Wind

Frost line

26 December 2025
Wet snow with some sunshine
-1°C / 3°C
4 mm
Nnw 2

816 metres

Date

Weather and snow

Expectation

Wind

Frost line

27 December 2025
Wet snow with some sunshine
-2°C / 4°C
2 mm
Zzo 2

743 metres

Date

Weather and snow

Expectation

Wind

Frost line

14 December 2025
Bright sunny weather
-4°C /0°C
0 mm
Z 6

2564 metres

Date

Weather and snow

Expectation

Wind

Frost line

15 December 2025
Regular sunshine with some clouds
-2°C /0°C
0 mm
Z 8

2503 metres

Date

Weather and snow

Expectation

Wind

Frost line

16 December 2025
Extensive cloud cover, hardly any sun
-1°C /-1°C
0 mm
Zzo 7

2402 metres

Date

Weather and snow

Expectation

Wind

Frost line

17 December 2025
Regular sunshine with some clouds
-2°C /-1°C
0 mm
Zzo 5

2142 metres

Date

Weather and snow

Expectation

Wind

Frost line

18 December 2025
Bright sunny weather
-2°C /-1°C
0 mm
Z 5

2159 metres

Date

Weather and snow

Expectation

Wind

Frost line

19 December 2025
Regular sunshine with some clouds
-2°C /-1°C
1 mm
Z 6

2248 metres

Date

Weather and snow

Expectation

Wind

Frost line

20 December 2025
Snow showers with some sunshine
-3°C /-1°C
1 cm
Ozo 5

1819 metres

Date

Weather and snow

Expectation

Wind

Frost line

21 December 2025
Regular sunshine with some clouds
-3°C /-1°C
1 mm
Zo 5

1618 metres

Date

Weather and snow

Expectation

Wind

Frost line

22 December 2025
Regular sunshine with some clouds
-5°C /-2°C
1 mm
O 4

1277 metres

Date

Weather and snow

Expectation

Wind

Frost line

23 December 2025
Snow showers with some sunshine
-5°C /-3°C
1 cm
No 5

1114 metres

Date

Weather and snow

Expectation

Wind

Frost line

24 December 2025
Snow showers with some sunshine
-6°C /-4°C
1 cm
Nno 5

840 metres

Date

Weather and snow

Expectation

Wind

Frost line

25 December 2025
Snow showers with some sunshine
-6°C /-4°C
1 cm
Nno 6

870 metres

Date

Weather and snow

Expectation

Wind

Frost line

26 December 2025
Snow showers with some sunshine
-6°C /-4°C
4 cm
Nno 6

816 metres

Date

Weather and snow

Expectation

Wind

Frost line

27 December 2025
Snow showers with some sunshine
-6°C /-4°C
2 cm
Nno 6

743 metres

Snow depth in Unterwasser

Snow is what makes a ski holiday special. Ideally, we wake up every day to Kaiser weather: a layer of fresh snow, bright sunshine, and a clear blue sky. However, icy temperatures and heavy snowfalls are also part of the experience. Or those foggy days when you ski from hut to hut, warming up with a cup of coffee, tea, or hot chocolate. When it comes to winter sports, the weather can be unpredictable, and nothing changes more rapidly than mountain weather. In addition to the forecast for the coming days, the current snow depth is a key part of the weather report in Unterwasser. How much snow is there on the mountain and in the valley of the Toggenburg ski area? Check the table below to see the current snow depth in Unterwasser.

Snow depth on the mountain and in the valley

Mountain: 70 cm

Valley: 10 cm

  • Snow depth valley 10
  • Cross-country ski trails open (km) 0
  • Valley descent open Closed
  • Hiking trails open (km) 0

Pistes Chäserrugg – Unterwasser/​Alt St. Johann

Snow depth valley 10
Number of km 12
Snow depth mountain 70
Number of lifts open 8
Type of snow Kunstschnee
Funpark Closed
Latest snowfall 27 November 2025
Toboggan run Closed
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Set up SnowAlert for Unterwasser

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Explanation of the weather forecast in Unterwasser

The weather report for Unterwasser is updated daily and is carefully compiled by meteorologists working with Snowplaza. Curious about the forecast for the next two days? Check out the 48-hour weather forecast, which provides information for the morning, afternoon, evening, and night. The symbols indicate whether snow or rain is expected, whether it will be cloudy, or if the sun will be shining. Click on "village" to see the weather conditions in the valley, and on "mountain" for forecasts at higher altitudes. The zero-degree line indicates the frost line, which changes depending on the temperature. Don't confuse it with the snowline—snow can still fall several hundred meters below the zero-degree line. For a longer-term outlook, check the 14-day weather forecast for Unterwasser. Keep in mind that weather conditions can change dramatically over two weeks, so be sure to check back daily if you're planning a winter sports trip soon.