A northerly, moderate and mostly variable flow prevails over the West of the basin. Over the East, it is southerly, moderate and mostly variable.
For Saint-Jean-de-Monts :
No gale warning.
We are 90% sure of the situation, because in this type of situation, it is difficult to define precisely when the precipitation will begin.
Fog developing into low cloud. No precipitation. In the evening, overcast skies.
Light rain in the early hours. E force 2 in the middle of the day turning NE force 3 in the evening. Gusts reaching 16 knots in the evening. Slight sea. Low, long swell from SW. Visibility reduced by fog becoming good in the evening.