For Portonovo :
No gale warning.
The reliability of the situation is assessed at 90%.
Cloud and sun in the morning, sunny in the afternoon. No precipitation. In the evening, clear skies.
SE force 3 turning E force 2 in the middle of the day then WNW. Gusts reaching 17 knots in the morning. Smooth sea becoming rippled in the evening. Low, short swell from E. Excellent visibility.