A northwesterly, weak and very variable flow prevails over the whole area.
For Hardelot-Plage :
No gale warning.
For the night from Wednesday to Thursday NW force 3 in the early part of the night temporarily force 2. Gusts reaching 15 knots in the early part of the night.
Slight sea. Low, short swell from WSW. Excellent visibility temporarily in the middle of the night. Daytime of Thursday 20 august : The atmosphere will remain unstable.
Good clear periods alternating with cloudy spells, sometimes dense. Light showers all day. In the evening, cloudy spells, sometimes dense.
Light showers progressively becoming less frequent. NNW wind force 3 continuing all day. Gusts reaching 15 knots in the evening. Slight sea becoming smooth to slight in the middle of the day. Low, short swell from E. Excellent visibility becoming excellent in the middle of the day.