A northeasterly, moderate and very variable flow prevails over the whole area.
For Pornichet :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Fair weather with mostly clear skies. In the evening, light cloudy spells.
E force 3 in the morning becoming ENE force 4 in the middle of the day. Gusts reaching 22 knots in the middle of the day. Smooth sea. Low, short swell from WSW. Excellent visibility becoming excellent in the middle of the day then excellent.