A westerly, weak and particularly variable flow prevails over the whole area.
For Berck sternes :
No gale warning.
For the night from Monday to Tuesday WNW wind force 2 continuing all night. Gusts reaching 14 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. Excellent visibility becoming excellent in the middle of the night then good. Daytime of Tuesday 18 august : The sky will remain changeable.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of showers in the morning, possibility of showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Possibility of showers WNW force 2 becoming force 3 in the middle of the day then NW. Gusts reaching 17 knots in the evening. Slight sea. Low from N then from W in the middle of the day then from W. Good visibility becoming excellent in the middle of the day.