A southeasterly, strong and very variable flow prevails over the North of the basin. Over the South, it is westerly, very strong and very variable.
For Arcachon :
Warning moderate gale offshore.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
In the evening, cloud and long sunny periods.
Showers towards the end of the night. SW wind force 5. Gusts reaching 26 knots in the evening. Smooth sea. Low, fairly long swell from WNW. Excellent visibility.