For Saint-Denis-D"Oleron :
No gale warning.
For the night from Friday to Saturday NNW force 3 turning NNE in the middle of the night then NE. Gusts reaching 15 knots until the middle of the night.
Smooth to slight sea. Low from N. Excellent visibility. Daytime of Saturday 22 august : The weather will become more uncertain during the day.
Good clear periods alternating with cloudy spells, sometimes more dense in the afternoon. The risk of seeing rain will remain low. In the evening, cloudy spells, sometimes dense.
Light showers. ENE force 3 turning NNW in the middle of the day then becoming force 4. Gusts reaching 17 knots in the evening. Smooth to slight sea. Low from N. Excellent visibility.