For Portonovo :
No gale warning.
The reliability of the situation is assessed at 90%.
Little cloud in the morning, sunny despite some high cloud in the afternoon. No precipitation. In the evening, clear skies.
NNW force 2 in the morning temporarily N force 3 in the middle of the day. Gusts reaching 13 knots in the middle of the day. Smooth to slight sea becoming smooth in the middle of the day. Low, short swell from NNE. Excellent visibility.