For Chapelle sur erdre :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Bright spells increasing during the morning, cloud and sun in the afternoon. No precipitation. In the evening, skies with few clouds.
S force 2 in the morning turning WSW force 3 in the middle of the day. Gusts reaching 18 knots in the middle of the day. Smooth sea. Low, fairly long swell from W. Poor visibility becoming excellent in the middle of the day then good.