For Portonovo :
No gale warning.
The reliability of the situation is assessed at 80%.
Very cloudy skies with short clear spells. Risk of some spots of rain in the morning, possibility of showers in the afternoon. In the evening, very cloudy skies to overcast.
Chance of light rain. S force 3 in the morning turning W in the evening. Gusts reaching 18 knots in the middle of the day. Smooth sea. Low, short swell from ESE. Excellent visibility.