Gem. Passantenhaven Nieuwegein is a dedicated transient marina situated at the junction of the Vaartse Rijn and the Merwedekanaal, a short distance south of WSV Plettenburg, in the Vreeswijk district of Nieuwegein.

Its convenient position relative to the Amsterdam-Rijnkanaal, Merwedekanaal, and the Lek makes it a popular overnight stop for recreational boaters passing through the region.

The harbor accommodates primarily motorboats up to fifteen meters and small sailboats with a draft of up to one and a half meters, with vessels of twelve meters or longer assigned to the north side.

It offers around twenty visitor berths in box moorings on pontoons. Facilities in the harbor building include showers, toilets, a washing machine, dryer, and a chemical toilet disposal point, along with shore power and Wi-Fi.

Beyond the marina itself, the historic old quarter of Vreeswijk, local museums, and easy access to Utrecht by bus make Nieuwegein a worthwhile destination for cruisers exploring the Dutch waterway network.