For La Tranche-sur-Mer :
No gale warning.
We are 80% sure of the situation, because the high pressure system could move in more quickly than forecast.
Very cloudy. Chance of light rain. In the evening, very cloudy.
Chance of light rain. SSE force 2 in the middle of the day becoming SE force 3 in the evening. Smooth to slight sea. Low, fairly long swell from WSW. Excellent visibility becoming excellent in the evening.