A northerly and variable flow prevails over the North-West of the basin. Over the South-West, it is easterly, weak and variable. Over the East, it is westerly, moderate and very variable.
For Katwijk aan Zee :
No gale warning.
The reliability of the situation is assessed at 90%.
Fair weather with mostly clear skies. In the evening, skies with few clouds.
SSE force 2 turning NW in the middle of the day then N force 3. Gusts reaching 13 knots from the middle of the day. Rippled sea becoming smooth in the evening. Low, fairly long swell from NNW. Excellent visibility.