An easterly and very variable flow prevails over the North of the basin. Over the South, it is southerly, weak and very 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.
Lots of good clear periods. No precipitation. In the evening, very cloudy skies clearing completely.
No precipitation. SSW force 3 in the middle of the day becoming SW force 2 in the evening. Gusts reaching 14 knots in the middle of the day. Smooth to slight sea. Low, fairly long swell from SW. Excellent visibility becoming good in the evening.