A northeasterly, strong and variable flow prevails over the South-West of the basin. Over the North and the East, it is westerly, strong and very variable.
Für Les Sables-d"Olonne : No gale warning.
The reliability of the situation is poor. For the night from Wednesday to Thursday NW force 3 in the early part of the night turning N force 2. Gusts reaching 14 knots in the early part of the night.
Slight sea. Low, fairly long swell from WNW. Excellent visibility becoming excellent in the middle of the night then good. Daytime of Thursday 17 september : The weather will become more uncertain during the day.
Sun but cloud increasing in the morning, very cloudy skies to overcast in the afternoon.No precipitation in the morning, showers late in the day.In the evening, very cloudy skies to overcast. Drizzle followed by showers. NNW force 2 in the morning freshening W force 4 in the middle of the day. Gusts reaching 21 knots in the evening. Slight sea. Low, short swell from WNW. Good visibility becoming excellent in the middle of the day then good.