For Batz-sur-Mer :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Fairly clear skies progressively clouding over in the morning, very cloudy in the afternoon. No precipitation. In the evening, very cloudy.
No precipitation. NNW force 3 turning WNW force 4 in the middle of the day then NNW. Gusts reaching 18 knots in the evening. Slight sea. Low, long swell from WSW. Excellent visibility becoming excellent in the middle of the day.