Grands Montets
📍 Rhone-Alpes , Departement de la Haute-Savoie · Nearest city: Chamonix-Mont-Blanc (8 km)
58 XC score / 100 · takeoff at 3234 m · 📍 View on map
Coordinates and external links
45.94780, 6.96000Forecast next days
Updated: 2026-05-02 16:09 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Not recommended for flying, cloud base ~68 m, strong wind (27 km/h), precipitation 8.9 mm.
base ~68m · wind 27 km/h · precip 8.9mmFlyable day, decent conditions, cloud base ~62 m, wind 13 km/h, precipitation 2.0 mm.
base ~62m · wind 13 km/h · precip 2.0mmComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
🌬 Daily wind (next days)
Daily summary (10m wind). Full hour × altitude chart is being added progressively.
Takeoff orientations
Green = good orientation · Yellow = possible · Gray = not suitable
🗓️ Best season to fly (2024 climatology)
Monthly climate score: historical avg of temp, wind, rain and cloud cover. Green = optimal month.
⭐ Best month: Jul (68/100, 8°C, 68mm lluvia) · Worst month: Sep (5/100, 186mm lluvia)
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 6 | Medium |
| Avg thermal probability | 0.82 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.35 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
high altitude take off (3250m), which can be reached with a cable car. The take off is on a glacier be carefull with the crevasses.... it's better to go there with a mountain guide. JULY/ AUGUST: actual TO lies OUTSIDE no-fly zone, but route of flight has to be selected carefully ( > see pix!)
Nearby sites
Flegere (65) · Plan Praz/ Brevent (Chamonix) (56) · Plan de l'Aiguille (Chamonix) (50) · Aiguille du Midi -S / N (61) · Loriaz (55) · Tete noire de Pormenaz (48)