A northwesterly, weak and particularly variable flow prevails over the whole area.
For Fécamp :
No gale warning.
For the night from Thursday to Friday WNW wind force 2 continuing all night. Gusts reaching 13 knots from the middle of the night.
Slight sea. Low, short swell from NNE. Good visibility. Daytime of Friday 21 august : The atmosphere will remain unstable.
Good clear periods alternating with cloudy spells, sometimes dense. Light showers all day. In the evening, good clear periods but cloud building.
Possibility of showers NW wind force 3 continuing all day. Gusts reaching 13 knots in the morning. Slight sea temporarily smooth to slight in the middle of the day. Low, short swell from NNE. Good visibility becoming excellent in the middle of the day.