An easterly, weak and particularly variable flow prevails over the North of the basin. Over the South, it is northwesterly, weak and particularly variable.
For La Tranche-sur-Mer :
No gale warning.
For the night from Saturday to Sunday N force 2 in the early part of the night turning NE. Gusts reaching 17 knots in the early part of the night.
Slight sea becoming smooth to slight at the end of the night. Low, short swell from W. Excellent visibility. Daytime of Sunday 23 august : Improving during the day:the sky will clear.
Skies changeable to very cloudy. Possibility of showers late in the morning, possibility of showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Chance of light rain. NE force 2 in the morning turning W force 3 in the middle of the day. Gusts reaching 14 knots in the morning. Smooth to slight sea. Low, fairly long swell from W. Excellent visibility becoming excellent in the evening.