A northerly and mostly variable flow prevails over the East of the basin. Over the West, it is southeasterly, moderate and mostly variable.
For Portonovo :
No gale warning.
The reliability of the situation is assessed at 95%.
In the evening, lots of good clear periods.
No precipitation. W wind force 2. Gusts reaching 6 knots in the evening. Rippled sea. Low, short swell from NNE. Excellent visibility.