A northwesterly, weak and very variable flow prevails over the West and the North of the basin. Over the South-East, it is southerly, weak and particularly variable.
For Berck Plage :
No gale warning.
For the night from Thursday to Friday NNE wind force 2 continuing all night. Gusts reaching 15 knots in the early part of the night.
Smooth to slight sea. Low, short swell from W. Excellent visibility becoming excellent at the end of the night. Daytime of Friday 21 august : The unsettled weather will become more unpredictable in the second half of the day.
Skies changeable to very cloudy. Risk of showers in the morning, light showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Light showers progressively becoming less frequent. NE force 2 turning NW in the middle of the day then N force 3. Gusts reaching 18 knots in the evening. Smooth to slight sea becoming slight in the evening. Low, short swell from W. Excellent visibility becoming excellent in the middle of the day.