A southwesterly, strong and mostly variable flow prevails over the whole area.
For Pornichet :
No gale warning.
We are 90% sure of the situation, because the atmosphere might not be as stable as forecast.
For the night from Monday to Tuesday W force 4 in the early part of the night becoming force 3. Gusts reaching 22 knots in the early part of the night.
Slight sea. Low, fairly long swell from WSW. Excellent visibility. Daytime of Tuesday 16 september : The weather will become more uncertain during the day.
Very cloudy skies with short clear spells. The risk of seeing rain will remain low. In the evening, clear periods developing.
No precipitation. W force 3 in the morning turning SW in the evening. Gusts reaching 17 knots in the morning. Slight sea. Low, fairly long swell from WSW. Excellent visibility.