Unterwasser 7-Day Snow Forecast

Unterwasser Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 21 March 2026 07:41 NZDT

Long-Range Snow Forecast for Unterwasser

Long-range (14 to 45 days) from 20 March.

For Forecast detail, see below.

Unterwasser Snow Forecast Highlights

When will there be fresh snow in Unterwasser?

Unterwasser Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (1,581m)
Next Snow Expected	23 March
Next Snow Amount	2cm
Next 48 Hours	1cm
Next 7 Days	34cm

Long-range Snow Outlook for Unterwasser

Snowfall

Snow Line

Max 10℃
Min -4℃

24cm New Snow

Snow Line from 1,869m to resort level (900m).

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Unterwasser Long-Range (2 weeks+) Snow Forecast Outlook

Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.

16 Day Weather and Snow Forecast for Unterwasser from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Fri 20	Clear spells at altitude, fair below.	Max 9℃ Min -2℃
Sat 21	1cm New Snow Cloudy. Snow Line from 1,054m to resort level (900m).	Max 8℃ Min -2℃
Sun 22	1cm New Snow Light snow showers. Snow Line from 1,500m to resort level (900m).	Max 7℃ Min -2℃
Mon 23	2cm to 3cm New Snow Light snow at altitude, light rain below. Snow Line from 1,285m to resort level (900m).	Max 5℃ Min -2℃
Tue 24	Clear spells.	Max 10℃ Min -4℃
Wed 25	3cm to 8cm New Snow Light snow showers at altitude, rain showers below. Snow Line from 1,869m to resort level (900m).	Max 9℃ Min -2℃
Thu 26	9cm to 12cm New Snow Heavy snow showers. Snow falling to resort level (900m).	Max 0℃ Min -3℃

This Snow Forecast for Unterwasser, Switzerland gives the predicted Snowfall and Freezing Levels for the next week.

The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Unterwasser, on any given piste or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.

Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.

Unterwasser Snow Forecast updated at 07:41 NZDT, next update expected 13:00 NZDT.

Ensemble forecast for Unterwasser, Switzerland at 900m

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

Snow Forecast near Unterwasser

Snow Forecasts for Ski Resorts near Unterwasser
Ski Area	48 Hr	7 Day
Flumserberg	3cm	43cm
Laterns	2cm	38cm
Dunserberg	2cm	36cm
Flims	3cm	34cm
Schwägalp	2cm	31cm
Wildhaus	3cm	29cm
Gommiswald	-	27cm

Snow Reliability

Unterwasser typically enjoys reliable snow conditions, with an average snow depth of 50-100 cm throughout the season. For the latest updates on snowfall and conditions, check J2Ski for accurate and timely information.

Off-Piste Safety in Unterwasser

Before skiing or snowboarding off-piste in Unterwasser, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.