Col des Frêtes
📍 Rhone-Alpes , Departement de la Haute-Savoie · Nearest city: Talloires (3 km)
53 XC score / 100 · takeoff at 1640 m · 📍 View on map
Coordinates and external links
45.85640, 6.24672Forecast next days
Updated: 2026-04-21 01:29 UTC · Source: Open-Meteo · Thermal window 10:00–18:00 local time
Flyable day, decent conditions, cloud base ~1230 m, wind 15 km/h.
base ~1230m · wind 15 km/hFlyable day, decent conditions, cloud base ~1430 m, wind 12 km/h.
base ~1430m · wind 12 km/hVery favorable day for XC, cloud base ~1537 m, wind 10 km/h.
base ~1537m · wind 10 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 60 at 14h
- Very stable day (CAPE<50, LI>2) — no thermals
- High cloud suck (75/100) — base below freezing with CU
| 08 35 | 09 35 | 10 55 | 11 55 | 12 55 | 13 55 | 14 60 ☁️⚠️ | 15 40 ☁️⚠️ | 16 35 ☁️⚠️ | 17 35 ☁️⚠️ | 18 35 ☁️⚠️ | 19 30 ☁️⚠️ | 20 30 ☁️⚠️ |
Peak 14h: CAPE 10 J/kg · LI 3.7 · BL top 1115 m · w* 0.0 m/s · cloud base 2652 m · 0°C at 2550 m · Pro score 58/100 · sun 36° 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: 14:00 (peak of the day)
Surface T: 10.0°C · Td: 1.9°C
LCL (cloud base): 1012 m
BL top: 1115 m
0°C level: 2550 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) | 8 | High |
| Avg thermal probability | 0.85 | Based on thousands of aggregated IGC flights |
| Solar orientation | 0.20 | Slope faces south in northern hemisphere |
| Own flight history | 0.00 | Thermals detected in platform IGC tracks |
Nearby sites
Lancrenaz (45) · Annecy - Planfait (55) · Chalet de la Froulaz (49) · Montmin (Col de la Forclaz) (47) · Chalet de l'Aulp (48) · Col du Varo (44)