Grand Som

50⛔ Not flyable

France · Takeoff 1578 m

Forecast next days

2026-07-0430

No recomendable para volar, base de cúmulos ~1335 m, viento 15 km/h.

Wind max: 15 km/h

Base: 1335 m

CAPE: 0

LI: 4.1

2026-07-0555

Día volable, condiciones decentes, base de cúmulos ~1785 m, viento 22 km/h.

Wind max: 22 km/h

Base: 1785 m

CAPE: 10

LI: 2.4

2026-07-0675

Día muy favorable para XC, base de cúmulos ~1507 m, viento 16 km/h.

Wind max: 16 km/h

Base: 1507 m

CAPE: 430

LI: 1.3

2026-07-0765

Día volable, condiciones decentes, base de cúmulos ~2765 m, viento 15 km/h.

Wind max: 15 km/h

Base: 2765 m

CAPE: 20

LI: 2.4

Map and thermal hotspots

Accessible list of hotspots (12)

Latitude	Longitude	Altitude (m)	Probability
45.344	5.845	1615	0.99
45.363	5.813	1595	0.90
45.342	5.835	1376	0.89
45.344	5.871	1810	0.82
45.390	5.765	1040	0.75
45.354	5.797	1206	0.72
45.408	5.779	748	0.72
45.368	5.805	1576	0.71
45.382	5.763	1071	0.70
45.385	5.869	1513	0.69
45.414	5.785	722	0.65
45.401	5.774	989	0.60

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Takeoff description

alti:1989m From the landing go to 'Saint Pierre de Chartreuse' village and cross it. Take the D102b road to the north ('Saint Pierre d'Entremont' direction) and stop on the 'Cucheron' pass. Walk and follow the sign 'Grand Son' summit during 3h. grass slope just before the summit.

About this site

Grand Som is a paragliding launch site in France, near Saint-Laurent-du-Pont. Takeoff elevation is 1578 meters above sea level. It has a good thermal and XC score of 50/100. Best wind directions for takeoff: NE. Check the daily forecast above for current flyability conditions including CAPE, lifted index, cloud base height, and wind speed.