High 1028 hPa centered on the North of France moving at 10 knots to the North-East to be centered on the Netherlands.
For Boulogne-sur-Mer :
No gale warning.
We are 90% sure of the situation, because the high pressure system could move in more quickly than forecast.
Sun in the morning, sunny despite some high cloud in the afternoon. No precipitation. In the evening, clear skies.
SE force 2 turning NW in the middle of the day then E force 3. Gusts reaching 11 knots in the evening. Smooth to slight sea becoming smooth in the evening. Low, fairly long swell from WNW. Excellent visibility.