Altiport (Les Arcs)
📍 Rhone-Alpes , Departement de la Savoie · Nearest city: Seez (5 km)
58 XC score / 100 · takeoff at 2081 m · 📍 View on map
Coordinates and external links
45.57660, 6.79940Forecast next days
Updated: 2026-04-21 01:21 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Flyable day, decent conditions, cloud base ~1361 m, wind 24 km/h.
base ~1361m · wind 24 km/hFlyable day, decent conditions, cloud base ~1461 m, strong wind (26 km/h).
base ~1461m · wind 26 km/hVery favorable day for XC, cloud base ~1748 m, wind 15 km/h.
base ~1748m · wind 15 km/hComposite flyability score (CAPE + LI + wind + precip + low clouds). Cross-check with local pilots before flying.
Detailed hourly weather
2026-04-21❌ Not recommended · peak 55 at 13h
- Very stable day (CAPE<50, LI>2) — no thermals
- High cloud suck (69/100) — base below freezing with CU
| 08 30 ☁️⚠️ | 09 30 ☁️⚠️ | 10 30 ☁️⚠️ | 11 30 ☁️⚠️ | 12 50 ☁️⚠️ | 13 55 ☁️⚠️ | 14 55 ☁️⚠️ | 15 55 ☁️⚠️ | 16 55 ☁️⚠️ | 17 45 ☁️⚠️ | 18 55 ☁️⚠️ | 19 55 ☁️⚠️ | 20 55 ☁️⚠️ |
Peak 13h: CAPE 10 J/kg · LI 3.8 · BL top 1435 m · w* 0.0 m/s · cloud base 3893 m · 0°C at 2600 m · sun 40° over slope
Hourly flyability (0–100). ⛈️ = storm risk · ☁️⚠️ = cloud suck · 🏔️ = active ridge lift. CAPE = convective energy, LI = stability, BL top = thermal ceiling, w* = estimated dry thermal velocity. Source: Open-Meteo (ECMWF/GFS/ICON blend model).
Estimated vertical profile (Sounding)
Reference time: 13:00 (peak of the day)
Surface T: 7.7°C · Td: -6.8°C
LCL (cloud base): 1812 m
BL top: 1435 m
0°C level: 2600 m
Approximate profile from surface variables + synoptic levels. Red lines = temperature, dashed blue = dew point. Orange bands = detected inversions.
🌬 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
Why this site has thermal potential
| Factor | Value | Interpretation |
|---|---|---|
| Hotspot density (5 km) | 7 | Medium |
| Avg thermal probability | 0.83 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.38 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Nearby sites
Arpette (Les Arcs) (54) · Aire de décollage Arc 1800 (5) · L'Aiguille Grive (5) · Poudreuse (Les Arcs) (57) · Bourg st maurice (47) · Vallandry (58)