A northeasterly, weak and very variable flow prevails over the East of the basin. Over the West, it is southerly, strong and very variable.
For Grande plage de Sion :
No gale warning.
The reliability of the situation is assessed at 80%.
Skies very cloudy to overcast in the morning, good clear periods with lots of cloud in the afternoon. Showers becoming less frequent in the morning, no precipitation in the afternoon. In the evening, clear periods developing.
No precipitation. NE force 2 in the morning temporarily SW in the middle of the day. Gusts reaching 11 knots until the middle of the day. Slight sea. Low, fairly long swell from W. Visibility reduced by mist becoming good in the middle of the day then poor.