For Portonovo :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Sun in the morning, sunny despite some high cloud in the afternoon. No precipitation. In the evening, clear skies.
NNE force 3 in the morning turning NNW in the evening. Gusts reaching 18 knots in the morning. Slight sea becoming smooth to slight in the middle of the day then smooth. Low, short swell from NNE. Excellent visibility.