A northeasterly and mostly variable flow prevails over the South of the basin. Over the North, it is westerly, moderate and variable.
For Saint-Brevin-Les-Pins :
No gale warning.
For the night from Thursday to Friday WNW force 3 in the early part of the night becoming NW force 2. Gusts reaching 14 knots in the early part of the night.
Slight sea. Low, short swell from W. Good visibility becoming poor in the middle of the night then poor. Daytime of Friday 18 september : The weather will become more uncertain during the day.
Skies changeable to very cloudy. The risk of seeing rain will remain low. In the evening, lots of good clear periods.
No precipitation. NW force 2 in the morning becoming WNW force 3 in the middle of the day. Gusts reaching 12 knots in the evening. Slight sea becoming smooth to slight in the middle of the day. Low, short swell from W. Poor visibility becoming excellent in the middle of the day then excellent.