A southeasterly, weak and very variable flow prevails over the South-West of the basin. Over the North and the East, it is southwesterly, moderate and very variable.
For Katwijk aan Zee :
No gale warning.
The reliability of the situation is assessed at 90%.
Cloudy spells, sometimes dense. No precipitation. In the evening, cloud and long sunny periods.
No precipitation. W force 3 in the middle of the day turning NNE force 2 in the evening. Gusts reaching 20 knots in the middle of the day. Smooth to slight sea. Low, short swell from WNW. Excellent visibility.