For La Tranche-sur-Mer :
No gale warning.
We are 90% sure of the situation, because the atmosphere might be less unstable and showers more frequent than forecast.
Fairly cloudless skies becoming changeable during the morning, increasing sunny spells in the afternoon. No precipitation. In the evening, clear periods developing.
No precipitation. S wind force 4 continuing all day. Gusts reaching 18 knots in the morning. Slight sea becoming moderate in the middle of the day. Low, fairly long swell from W then moderate in the middle of the day. Excellent visibility.