For Kostersten :
No gale warning.
The reliability of the situation is good.
Little cloud in the morning, sunny despite some high cloud in the afternoon. No precipitation. In the evening, good clear periods but cloud building.
No precipitation. SSW force 3 in the morning temporarily force 4 in the middle of the day. Gusts reaching 23 knots in the middle of the day. Slight sea. Low from N then from WSW in the middle of the day then from SW. Excellent visibility.