If you go to Noordwijk it should be for the beach. Because of this Summer time would be ideal. In the winter you may be stuck for things to do, The place is very nice and has a great atmosphere but there aren't really any sites or activities. You will need to visit the next city (Leiden) for this or further cities over.
There are clubs but it's very much a small town nightlife scene, with very average music. With a good group of friends though, you'll be sure to have a nice enough time.