For La Tranche-sur-Mer :
No gale warning.
The reliability of the situation is assessed at 90%.
Some fair-weather cumulus clouds. In the evening, skies with few clouds.
ENE force 3 in the middle of the day turning NNE force 4 in the evening. Gusts reaching 17 knots in the evening. Smooth sea. Low, fairly long swell from WSW. Excellent visibility.