For La Tranche-sur-Mer :
No gale warning.
We are 75% sure of the situation, because the high pressure system could move in more quickly than forecast.
Clear skies. In the evening, skies with few clouds.
W force 3 in the middle of the day becoming WNW force 4 in the evening. Gusts reaching 16 knots in the evening. Smooth sea becoming smooth to slight in the evening. Low, short swell from WSW. Excellent visibility.