For De Saint-Nazaire à Nantes :
No gale warning.
The reliability of the situation is assessed at 90%.
Clear skies becoming somewhat cloudy. In the evening, light cloudy spells.
NNE force 2 in the middle of the day turning WNW in the evening. Gusts reaching 10 knots in the evening. Smooth sea. Low, fairly long swell from W. Good visibility becoming excellent in the evening.