A northerly and mostly variable flow prevails over the South of the basin. Over the North, it is southwesterly, weak and particularly variable.
For Royan :
No gale warning.
For the night from Sunday to Monday NNW force 2 becoming force 1 in the middle of the night then NNE. Gusts reaching 14 knots in the early part of the night.
Smooth to slight sea. Low, short swell from WNW. Excellent visibility becoming excellent in the middle of the night then excellent. Daytime of Monday 17 august : The unsettled weather will become more unpredictable in the second half of the day.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of showers in the morning, light showers dying away progressively in the afternoon. In the evening, cloudy spells, sometimes dense.
Possibility of showers NE force 1 freshening W force 3 in the middle of the day then becoming NW. Gusts reaching 17 knots in the evening. Smooth to slight sea. Low, short swell from WNW. Excellent visibility becoming excellent in the middle of the day.