A northwesterly, moderate and variable flow prevails over the whole area.
For La Tranche-sur-Mer :
No gale warning.
The reliability of the situation is poor.
For the night from Monday to Tuesday NE wind force 2 continuing all night. Gusts reaching 9 knots until the middle of the night.
Smooth to slight sea. Low, short swell from W. Excellent visibility. Daytime of Tuesday 15 september : The weather will be good.
Sunny despite some high cloud in the morning, sunny in the afternoon. No precipitation. In the evening, skies with few clouds.
E force 2 freshening WNW force 4 in the middle of the day then becoming NW. Gusts reaching 25 knots in the evening. Smooth to slight sea becoming slight in the middle of the day. Low, short swell from W. Excellent visibility.