A southwesterly, strong and very variable flow prevails over the whole area.
For Grève des Fosses :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Clear skies. In the evening, very cloudy.
No precipitation. WSW force 4 in the middle of the day becoming SW force 3 in the evening. Gusts reaching 21 knots in the middle of the day. Slight sea. Low, long swell from NW. Excellent visibility becoming poor in the evening.