A southerly, very strong and variable flow prevails over the East of the basin. Over the West, it is westerly, very strong and variable.
For Saint-Brevin-Les-Pins :
Warning moderate gale offshore.
The reliability of the situation is poor.
For the night from Wednesday to Thursday S force 3 in the early part of the night becoming SSE force 4. Gusts reaching 21 knots at the end of the night.
Slight sea. Low, fairly long swell from W. Excellent visibility becoming good in the middle of the night then good. Daytime of Thursday 18 december : The sky will remain very cloudy.
Very cloudy skies with short clear spells. Risk of some spots of rain in the morning, drizzle in late afternoon. In the evening, very cloudy skies becoming totally overcast.
Light rain. SSE force 5 in the morning turning SSW in the evening. Gusts reaching 32 knots in the middle of the day. Moderate sea. Low, fairly long swell from W. Good visibility becoming excellent in the middle of the day.