Oesterhaven is a marina on the Veerse Meer, positioned as the first port after the Zandkreeksluis — the lock connecting the Veerse Meer with the Oosterschelde.

Affiliated with HISWA, the marina has 153 berths and is open year-round to both permanent berth holders and visiting boats. Moorings offer open views across the water, and the site has a notably relaxed, welcoming atmosphere.

Within walking distance are a large watersports shop, a supermarket, and three restaurants. De Viking sailing school operates on-site, offering lessons and boat rentals.

The marina also cultivates its own Veerse Meer oysters and mussels, making it something of a culinary destination as well as a practical stopover.