A northerly and mostly variable flow prevails over the South-West of the basin. Over the North and the East, it is southwesterly, strong and very variable.
For Plage de Portrieux :
No gale warning.
The reliability of the situation is assessed at 80%.
Fairly cloudless skies becoming changeable during the morning, cloud largely disappearing in the afternoon. No precipitation. In the evening, skies gradually hazing over.
No precipitation. N force 3 turning NE in the middle of the day then ENE force 2. Gusts reaching 15 knots in the morning. Slight sea becoming smooth to slight in the middle of the day. Low, short swell from N. Poor visibility becoming excellent in the middle of the day.