A northerly, moderate and variable flow prevails over the South-West of the basin. Over the South-East, it is easterly, weak and variable. Over the North, it is southwesterly, moderate and very variable.
Für Les Sables-d"Olonne : No gale warning.
The reliability of the situation is poor. For the night from Thursday to Friday NW force 3 in the early part of the night becoming NNW force 2. Gusts reaching 16 knots in the early part of the night.
Slight sea. Low, short swell from WNW. Good visibility becoming poor in the middle of the night then poor. Daytime of Friday 18 september : The sky will remain changeable.
Skies changeable to very cloudy.No precipitation.In the evening, lots of good clear periods. No precipitation. N force 2 turning W force 3 in the middle of the day then WNW. Gusts reaching 12 knots from the middle of the day. Slight sea. Low, short swell from WNW. Poor visibility becoming excellent in the middle of the day then excellent.