For La Tranche-sur-Mer :
No gale warning.
The reliability of the situation is assessed at 90%.
Warm sun all day. In the evening, clear skies.
ENE force 4 in the morning becoming force 5 in the middle of the day. Gusts reaching 30 knots in the evening. Slight sea becoming moderate in the evening. Low, long swell from W. Good visibility becoming excellent in the middle of the day.