Bisanne Sud
📍 Rhone-Alpes , Departement de la Savoie · Nearest city: Beaufort (6 km)
66 XC score / 100 · takeoff at 1929 m · 📍 View on map
Coordinates and external links
45.74690, 6.50704Forecast next days
Updated: 2026-04-19 16:02 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Día muy favorable para XC, base de cúmulos ~886 m, viento 14 km/h.
base ~886m · wind 14 km/hDía muy favorable para XC, base de cúmulos ~1101 m, viento 13 km/h.
base ~1101m · wind 13 km/hDía volable, condiciones decentes, base de cúmulos ~1720 m, viento 10 km/h.
base ~1720m · wind 10 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Wind chart — altitude × time
Color: green < 20 km/h · yellow 20-30 · red >40. Arrows point to where the wind is blowing. Each column = 1 hour. 4 altitudes: 10m surface, 80m first thermal, 1500m (850 hPa) thermal cruise, 3000m (700 hPa) top.
Wind next days (Open-Meteo model)
Wind rose 10m — 2026-04-20
| Date | Morning 08-12h | Midday 12-16h | Evening 16-20h | |||
|---|---|---|---|---|---|---|
| 2026-04-20 | 5 km/h SW | gust 18 | 14 km/h W | gust 30 | 10 km/h W | gust 28 |
| 2026-04-21 | 4 km/h NW | gust 14 | 10 km/h W | gust 24 | 9 km/h W | gust 25 |
Colors: green < 15 km/h (optimal) · orange 15-25 · red >25 (flying not recommended). ⚠️ = shear >25 km/h between 10m and 850 hPa (potentially broken thermals).
Takeoff orientations
Green = good orientation · Yellow = possible · Gray = not suitable
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 5 | Medium |
| Avg thermal probability | 0.80 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.78 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Takeoff description
alti: 1940m It is near the altitude restaurant. This takeoff is on the top, on the South-East side. Just next to the parking.
Pilot comments
It might happen that your arrive too late at this takeoff (like 12am or later) and the valley breeze is already blowing from the back (North) Then there is an alternate takeoff (check the map), that can also be used with North wind from which you can still takeoff and reach the south face (in the lee side). Discouraged with strong North wind ! A good idee to go to 'Aravis', in spring. Beaufortain is a good district for family holidays: a lots of differents activities. You can finish your day in 'Le Cormet de Roselend', a soaring site. You will fly until the night with the breeze!
Nearby sites
Bisanne Nord (47) · Le Méruz (76) · Fenetre 7 (46) · Le Grand Mont (63) · Praz sur arly (56) · Roche parstir (47)