A northeasterly, weak and very variable flow prevails over the South of the basin. Over the North, it is northwesterly, moderate and particularly variable.
For Saint-Brevin-Les-Pins :
No gale warning.
For the night from Wednesday to Thursday N force 3 in the early part of the night becoming NNE force 2. Gusts reaching 17 knots in the early part of the night.
Smooth to slight sea. Low, short swell from W. Excellent visibility becoming good in the middle of the night then poor. Daytime of Thursday 20 august : The sky will remain changeable.
Good clear periods alternating with cloudy spells, sometimes more dense in the afternoon. No precipitation. In the evening, cloudy spells, sometimes dense.
No precipitation. NNE force 2 turning WNW force 3 in the middle of the day then NW. Gusts reaching 18 knots in the evening. Smooth to slight sea becoming slight in the middle of the day. Low, short swell from W. Poor visibility becoming excellent in the middle of the day.