A northwesterly and very variable flow prevails over the whole area.
For Royan :
No gale warning.
For the night from Wednesday to Thursday NW force 3 in the early part of the night turning N force 2. Gusts reaching 16 knots in the early part of the night.
Smooth to slight sea becoming rippled in the middle of the night then smooth. Low, short swell from WNW. Excellent visibility. Daytime of Thursday 20 august : The unstable weather will die away during the day.
Good clear periods alternating with cloudy spells, rather dense in the morning. Some light showers in the morning, possibility of a few spots in the afternoon. In the evening, cloud and long sunny periods.
Chance of light rain. N force 2 freshening WNW force 4 in the middle of the day then becoming NW. Gusts reaching 18 knots in the evening. Smooth sea. Low, fairly long swell from W then from N in the middle of the day. Excellent visibility.