For Mouillage de Saint-Cast :
No gale warning.
For the night from Friday to Saturday NNE force 2 becoming force 1 in the middle of the night then NE. Gusts reaching 13 knots in the early part of the night.
Smooth to slight sea. Low, short swell from WNW. Excellent visibility becoming good in the middle of the night then good. Daytime of Saturday 22 august : The atmosphere will remain unstable.
Skies changeable to very cloudy. Light showers all day. In the evening, clear periods developing.
Possibility of showers NE force 1 freshening N force 4 in the middle of the day then force 3. Gusts reaching 17 knots in the evening. Smooth to slight sea. Low, short swell from NW. Good visibility becoming excellent in the middle of the day.