A northerly and very variable flow prevails over the whole area.
For Les Sables-d"Olonne :
No gale warning.
The reliability of the situation is poor.
For the night from Thursday to Friday ENE force 3 in the early part of the night turning NNE. Gusts reaching 17 knots in the early part of the night.
Slight sea becoming smooth to slight at the end of the night. Low, short swell from WNW. Excellent visibility. Daytime of Friday 23 may : The weather will become more uncertain during the day.
Cloud and long sunny periods. No precipitation in the morning, possibility of showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Light showers. NNE force 3 in the morning turning NNW in the middle of the day. Gusts reaching 18 knots in the evening. Smooth to slight sea becoming slight in the middle of the day. Low, short swell from WNW. Excellent visibility.