Hiswa, one of the biggest dutch boat shows is coming up. The expo is not as big as BOOT Dusseldorf but you can still find a lot of boats and water sports related stands.
There is one major difference with BOOT, there are almost no windsurfing exhibitors. As a windsurfer I wouldn’t advice you to go there, only if you interested in boats, looking for tips on boat maintenance, rigging tips, navigational equipment or other related topics.
Here you can find out how to get there.