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.
Very cloudy in the morning, cloud and sun in the afternoon. No precipitation. In the evening, skies with few clouds.
ESE force 1 freshening W force 3 in the middle of the day then becoming WNW. Gusts reaching 15 knots in the evening. Rippled sea. Low, short swell from NW. Poor visibility becoming excellent in the middle of the day then good.