A northeasterly, strong and very variable flow prevails over the South of the basin. Over the North, it is westerly, moderate and very variable.
For La Tranche-sur-Mer :
No gale warning.
We are 75% sure of the situation, because the high pressure system could move in more quickly than forecast.
Changeable skies becoming fairly cloud-free in the morning, sunny in the afternoon. Risk of some spots of rain in the morning, no precipitation in the afternoon. In the evening, clear skies.
NNE force 3 turning W force 4 in the middle of the day then WNW. Gusts reaching 21 knots in the evening. Smooth to slight sea. Low, short swell from WSW. Excellent visibility.