A northerly and moderate flow prevails over the South-West of the basin. Over the North and the East, it is westerly, very strong and mostly variable.
For La Tranche-sur-Mer :
No gale warning.
We are 90% sure of the situation, because the atmosphere might not be as stable as forecast.
In the evening, hazy skies.
No precipitation. WNW wind force 3. Gusts reaching 15 knots in the evening. Slight sea. Low, fairly long swell from WSW. Excellent visibility.