A northerly, weak and particularly variable flow prevails over the whole area.
For Berck sternes :
No gale warning.
For the night from Saturday to Sunday ENE force 3 in the early part of the night temporarily force 2. Gusts reaching 21 knots in the early part of the night.
Smooth to slight sea becoming slight in the middle of the night. Low, short swell from W then from N in the middle of the night. 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, good clear periods but cloud building.
Possibility of showers ENE force 3 in the morning turning NNE force 2 in the middle of the day. Gusts reaching 17 knots in the morning. Slight sea. Low from N then from WSW in the evening. Excellent visibility.