For La Tranche-sur-Mer :
No gale warning.
The reliability of the situation is assessed at 75%.
Changeable skies becoming less cloudy. Chance of light rain. In the evening, very cloudy.
No precipitation. NW force 5 in the middle of the day becoming WNW force 4 in the evening. Gusts reaching 26 knots in the middle of the day. Moderate sea becoming slight in the evening. Moderate, fairly long swell from WSW then low in the evening. Excellent visibility.