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.
Little cloud in the morning, hazy cloud thickening in the afternoon. No precipitation. In the evening, hazy skies.
No precipitation. WNW force 3 becoming W force 4 in the middle of the day then WNW. Gusts reaching 18 knots from the middle of the day. Smooth to slight sea. Low, short swell from WSW. Good visibility becoming excellent in the middle of the day.