A northeasterly, moderate and mostly variable flow prevails over the whole area.
For Portonovo :
Warning moderate gale offshore.
The reliability of the situation is very good.
Warm sun all day. In the evening, clear skies.
NNE force 3 in the morning becoming force 4 in the middle of the day. Gusts reaching 30 knots in the evening. Smooth to slight sea. Low, fairly long swell from W. Excellent visibility.