Grande Casse Weather
Summit forecast at 3855 m · Western Alps · FR · SAC WS
Summit window
Summit window today 08:00–17:00
Summit window tomorrow 08:00–16:00 — rain from 16:00
Mountain weather changes fast. This is a forecast, not a safety guarantee — check official mountain forecasts and turn back when in doubt.
Avalanche danger
- Today1 – Low
The highest level in this area, from the official bulletin · Official avalanche bulletins (EAWS)
7-day summit forecast
| Day | Low / High | Summit wind | Rain | Freezing level | Storm risk |
|---|---|---|---|---|---|
| ☀️ Today | -16° / -9° | 17 km/h | 2% | 1600–2470 m | low |
| ⛅ Wed, Nov 4 | -14° / -12° | 27 km/h | 38% | 1820–2260 m | low |
| 🌤 Thu, Nov 5 | -13° / -8° | 30 km/h | 35% | 1920–2590 m | low |
| ⛅ Fri, Nov 6 | -12° / -8° | 33 km/h | 60% | 1990–2570 m | low |
| ☀️ Sat, Nov 7 | -15° / -9° | 22 km/h | 35% | 1640–2420 m | low |
| 🌨 Sun, Nov 8 | -15° / -8° | 40 km/h | 34% | 1620–2670 m | low |
| 🌫 Mon, Nov 9 | -11° / -6° | 43 km/h | 35% | 2170–2960 m | low |
Temperatures at the summit (3855 m), blended from 9 weather models (ECMWF IFS, NOAA GFS, DWD ICON, UK Met Office, Canada GEM, JMA (Japan), Météo-France, KNMI HARMONIE, DMI HARMONIE).
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