A westerly, weak and particularly variable flow prevails over the whole area.
For Calais :
No gale warning.
For the night from Monday to Tuesday NE force 4 in the early part of the night becoming force 3. Gusts reaching 18 knots in the early part of the night.
Slight sea. Low, short swell from NNE then from W in the middle of the night then from NNW. Excellent visibility. Daytime of Tuesday 18 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. NE wind force 4 continuing all day. Gusts reaching 17 knots in the evening. Slight sea. Low, short swell from NNW then from N in the middle of the day. Excellent visibility.