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.
Clear skies becoming somewhat cloudy. In the evening, good clear periods but lots of cloud, too.
No precipitation. W wind force 4 from the middle of the day. Gusts reaching 18 knots. Rippled sea. Low, fairly long swell from NW. Excellent visibility.