For Deauville-Trouville :
No gale warning.
For the night from Thursday to Friday WNW force 2 in the early part of the night turning WSW. Gusts reaching 15 knots at the end of the night.
Smooth sea. Low from N then from NW at the end of the night. Excellent visibility becoming good in the middle of the night then good. Daytime of Friday 21 august : The unsettled weather will become more unpredictable in the second half of the day.
Good clear periods alternating with cloudy spells, sometimes dense. Risk of showers in the morning, light showers in the afternoon. In the evening, cloudy spells, sometimes dense.
Light showers. SW force 2 turning WNW in the middle of the day then N force 3. Gusts reaching 19 knots in the evening. Smooth sea. Low, short swell from NW then from N in the middle of the day. Good visibility becoming excellent in the middle of the day.