Aletsch 7-Day Snow Forecast

Aletsch Long-Range Snow Forecast Updated today

ECMWF IFS

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Updated 11 August 2026 05:42 PDT

Long-Range Snow Forecast for Aletsch

Long-range (14 to 45 days) from 11 August.

For Forecast detail, see below.

Aletsch Snow Forecast Highlights

When will there be fresh snow in Aletsch?

Aletsch Snow Forecast Highlights - ECMWF IFS
Snowfall prediction at mid-mountain (6,480ft)
Next Snow?
There is no snow currently in the forecast for Aletsch.
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Long-range Snow Outlook for Aletsch

Snowfall

Snow Line

Max 87°F
Min 52°F

Snow unlikely

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Aletsch 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 Aletsch from OpenMeteo(ECMWF IFS)
	Snow and Weather	Temp Town
Tue 11	Clear sky.	Max 85°F Min 57°F
Wed 12	Clear sky at altitude, fair below.	Max 84°F Min 56°F
Thu 13	Clear sky.	Max 87°F Min 52°F
Fri 14	Clear sky.	Max 87°F Min 55°F
Sat 15	Clear sky.	Max 79°F Min 60°F
Sun 16	Fair at altitude, light drizzle below.	Max 74°F Min 56°F
Mon 17	Light snow at altitude, rain showers below.	Max 70°F Min 53°F

This Snow Forecast for Aletsch, 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 Aletsch, on any given trail 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.

Aletsch Snow Forecast updated at 05:42 PDT, next update expected 11:00 PDT.

Ensemble forecast for Aletsch, Switzerland at 3,445ft

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

Aletsch enjoys reliable snow conditions with average snow depths reaching up to 3 meters during peak season. Regular snowfall throughout the winter months helps maintain excellent skiing conditions, and for the latest updates, check J2Ski for real-time snow information.

Off-Piste Safety in Aletsch

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