A northeasterly, weak and particularly variable flow prevails over the South of the basin. Over the North, it is westerly, weak and particularly variable.
For Courseulles-sur-Mer :
No gale warning.
For the night from Thursday to Friday N force 2 in the early part of the night becoming force 1. Gusts reaching 14 knots in the early part of the night.
Smooth to slight sea. Low, short swell from NNE. Excellent visibility becoming good 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 late afternoon. In the evening, cloudy spells, sometimes dense.
Chance of light rain. NNW force 2 becoming N force 3 in the middle of the day then NNW. Gusts reaching 15 knots in the evening. Smooth to slight sea becoming slight in the evening. Low, short swell from NNE temporarily from N in the middle of the day. Good visibility becoming excellent in the middle of the day.