For Château d"Oléron :
No gale warning.
We are 70% sure of the situation, because the high pressure system could move in more quickly than forecast.
Cloud and long sunny periods. The risk of seeing rain will remain low. In the evening, skies with few clouds.
W force 3 becoming force 4 in the middle of the day then WNW. Gusts reaching 21 knots in the evening. Smooth sea. Low, short swell from WNW. Poor visibility becoming excellent in the middle of the day then excellent.