A northwesterly, moderate and variable flow prevails over the South and the East of the basin. Over the North-West, it is southwesterly, strong and very variable.
For Plage de Portrieux :
No gale warning.
The reliability of the situation is assessed at 80%.
Cloudy spells, sometimes dense. No precipitation. In the evening, very cloudy.
No precipitation. NNW force 4 in the middle of the day turning W force 3 in the evening. Gusts reaching 24 knots in the middle of the day. Slight sea becoming smooth to slight in the evening. Low, short swell from NNE. Excellent visibility.