SE to SO. Not flying with more than 20km/h wind.
from 9:00am to 17:00 in the summer
Best from 12:00 - 14:00
Flyable under the prevailing wind if it's not too strong.
Balise of 'The Dole' (DOL), 1670m):
http://www.meteosuisse.admin.ch/web/fr/meteo/temps_actuel.par0023.allStations.html