A westerly, weak and particularly variable flow prevails over the whole area.
For Berck sternes :
No gale warning.
For the night from Sunday to Monday NE force 2 in the early part of the night turning E force 1. Gusts reaching 17 knots in the middle of the night.
Smooth to slight sea. Low, short swell from WSW. Excellent visibility. Daytime of Monday 24 august : The atmosphere will remain unstable.
Skies changeable to very cloudy. Light showers all day. In the evening, clear periods developing.
Light showers. E force 1 turning WNW force 2 in the middle of the day then NW. Gusts reaching 15 knots in the morning. Smooth to slight sea. Low, short swell from W temporarily from N in the middle of the day. Excellent visibility becoming excellent in the middle of the day.