A northeasterly and very variable flow prevails over the South and the East of the basin. Over the North-West, it is southerly, strong and variable.
For Grande plage de Sion :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Clear skies or light cloud. Sun hazing over from time to time. No precipitation. In the evening, clear skies.
ESE force 3 in the morning turning ENE in the evening. Gusts reaching 15 knots in the morning. Slight sea. Low, fairly long swell from WSW. Excellent visibility becoming good in the evening.