For Saint-Valery-sur-Somme :
No gale warning.
For the night from Thursday to Friday WNW wind force 2 continuing all night. Gusts reaching 16 knots in the early part of the night.
Slight sea. Low, short swell from W. Excellent visibility becoming excellent in the middle of the night then good. Daytime of Friday 21 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.
Chance of light rain. W force 2 in the morning turning NW force 3 in the middle of the day. Gusts reaching 15 knots in the morning. Slight sea. Low, short swell from W. Good visibility becoming excellent in the middle of the day.