A northwesterly and mostly variable flow prevails over the South and the East of the basin. Over the North-West, it is southwesterly, moderate and mostly variable.
For Pornichet :
No gale warning.
The reliability of the situation is assessed at 90%.
Hazy skies. No precipitation. In the evening, relatively clear skies becoming changeable.
W wind force 4 from the middle of the day. Gusts reaching 20 knots in the evening. Smooth to slight sea. Low, short swell from WSW. Excellent visibility.