A westerly, strong and mostly variable flow prevails over the whole area.
For Katwijk aan Zee :
Warning fresh gale offshore.
The reliability of the situation is good.
Cloudy spells, dense at times in the morning, very cloudy skies to overcast in the afternoon. Risk of showers in the morning, showers in the afternoon. In the evening, good clear periods but lots of cloud, too.
Possibility of showers WSW force 5 in the morning becoming W force 4 in the evening. Gusts reaching 40 knots in the morning. Rough sea becoming moderate in the evening. Low, fairly long swell from SSE. Excellent visibility.