A southwesterly, moderate and very variable flow prevails over the whole area.
For Saint-Denis-D"Oleron :
No gale warning.
The reliability of the situation is assessed at 90%.
Fairly clear skies progressively clouding over in the morning, cloudy spells, sometimes dense, in the afternoon. No precipitation. In the evening, relatively clear skies becoming changeable.
NNW force 4 in the morning turning WNW in the middle of the day. Gusts reaching 21 knots all day. Slight sea. Low, fairly long swell from NNW. Excellent visibility.