A northeasterly and variable flow prevails over the South and the East of the basin. Over the North-West, it is southerly, moderate and very variable.
For Portonovo :
Warning strong breeze offshore.
The reliability of the situation is assessed at 90%.
Fair weather with mostly clear skies. In the evening, skies with few clouds.
NE force 1 turning W force 2 in the middle of the day then WSW. Gusts reaching 12 knots in the middle of the day. Smooth sea becoming smooth to slight in the middle of the day. Low, fairly long swell from WNW. Excellent visibility.