A southwesterly, strong and very variable flow prevails over the whole area.
For Katwijk aan Zee :
Warning moderate gale offshore.
The reliability of the situation is assessed at 90%.
Predominantly sunny in the morning, sunny, progressively clouding over in the afternoon. No precipitation. In the evening, overcast skies.
Drizzle intensifying and turning to rain. W force 3 freshening SW force 5 in the middle of the day then force 6. Gusts reaching 42 knots in the evening. Slight sea becoming moderate in the evening. Low, short swell from NW. Excellent visibility.