A northeasterly and moderate flow prevails over the South of the basin. Over the North-West, it is southwesterly, moderate and mostly variable. Over the North-East, it is northwesterly, moderate and mostly variable.
For Pornichet :
No gale warning.
The reliability of the situation is assessed at 95%.
Light cloudy spells. In the evening, good clear periods but cloud building.
No precipitation. W wind force 4 from the middle of the day. Gusts reaching 21 knots in the middle of the day. Smooth sea becoming smooth to slight in the evening. Low, short swell from WSW. Excellent visibility.