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.
Very cloudy in the morning, sunny in the afternoon. No precipitation. In the evening, skies with few clouds.
NW force 3 becoming WNW force 4 in the middle of the day then force 5. Gusts reaching 24 knots in the evening. Slight sea. Low, fairly long swell from WSW. Excellent visibility.