For Château d"Oléron :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Fair weather with mostly clear skies. In the evening, skies with few clouds.
SE force 2 turning WNW force 3 in the middle of the day then NW. Gusts reaching 15 knots in the evening. Rippled sea. Low, short swell from NW. Poor visibility becoming excellent in the middle of the day.