Unterwasser 7-Day Snow Forecast

Unterwasser Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 05 August 2026 12:47 UTC

Long-Range Snow Forecast for Unterwasser

Long-range (14 to 45 days) from 5 August.

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?
There is no snow currently in the forecast for Unterwasser.

Long-range Snow Outlook for Unterwasser

Snowfall

Snow Line

Max 27℃ 80°F
Min 13℃ 55°F

Snow unlikely

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
Wed 05	Clear sky.	Max 25℃ 78°F Min 17℃ 63°F
Thu 06	Light snow at altitude, thunderstorms below.	Max 22℃ 71°F Min 16℃ 61°F
Fri 07	Light snow at altitude, rain showers below.	Max 22℃ 72°F Min 14℃ 56°F
Sat 08	Clear sky.	Max 25℃ 78°F Min 13℃ 55°F
Sun 09	Clear sky at altitude, light drizzle below.	Max 27℃ 80°F Min 15℃ 59°F
Mon 10	Clear sky.	Max 26℃ 80°F Min 15℃ 59°F
Tue 11	Clear sky.	Max 25℃ 77°F Min 17℃ 63°F

No significant snowfall is forecast for this period.

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 12:47 UTC, next update expected imminently.

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 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.