Unterwasser 7-Day Snow Forecast

Unterwasser Long-Range Snow Forecast Updated today

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Updated 01 September 2026 19:47 NZST

Long-Range Snow Forecast for Unterwasser

Long-range (14 to 45 days) from 1 September.

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	14 September
Next Snow Amount	5cm
Next 48 Hours	-
Next 7 Days	-

Long-range Snow Outlook for Unterwasser

Snowfall

Snow Line

Max 29℃
Min 9℃

Snow unlikely

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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
Tue 01	Clear sky.	Max 21℃ Min 9℃
Wed 02	Fair.	Max 22℃ Min 10℃
Thu 03	Clear sky.	Max 23℃ Min 10℃
Fri 04	Clear sky.	Max 28℃ Min 11℃
Sat 05	Clear spells.	Max 26℃ Min 16℃
Sun 06	Clear sky.	Max 29℃ Min 16℃
Mon 07	Light snow at altitude, light rain below.	Max 25℃ Min 17℃

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 19:47 NZST, next update expected 01:00 NZST.

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.

Switzerland Accommodation (Apartments, Chalets, Hotels) Map

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.