A northerly, weak and variable flow prevails over the South and the East of the basin. Over the North-West, it is southwesterly, moderate and particularly variable.
For Saint-Brevin-Les-Pins :
No gale warning.
For the night from Wednesday to Thursday N force 3 in the early part of the night becoming NNE force 2. Gusts reaching 15 knots in the early part of the night.
Smooth to slight sea. Low, short swell from W. Excellent visibility becoming good in the middle of the night then poor. Daytime of Thursday 17 september : The largely blue sky won.t last.
Cloud and long sunny periods. No precipitation. In the evening, lots of good clear periods.
Chance of light rain. NNE force 2 in the morning turning NNW in the middle of the day. Gusts reaching 15 knots in the evening. Smooth to slight sea. Low, fairly long swell from W. Poor visibility becoming excellent in the middle of the day.