For Château d"Oléron :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Sun but cloud increasing in the morning, sunny in the afternoon. No precipitation. In the evening, clear skies.
NNE force 3 turning NNW in the middle of the day then NW force 4. Gusts reaching 19 knots in the evening. Smooth sea. Low, short swell from WNW. Poor visibility becoming excellent in the middle of the day.