Jachthaven Fjouwerhûs is a recreational marina situated directly on the Tsjûkemar (Tjeukemeer), in the small hamlet of Fjouwerhûs near Rohel in Friesland.

Set amid open natural surroundings, it offers around 50 permanent berths and a handful of visitor berths, with a reported average harbour depth of 1. 80 metres.

The marina caters to recreational boaters, nature lovers, and watersport enthusiasts, and boat rental is also available on site.

It serves as a well-equipped base for exploring the waterways of Friesland, with the Tsjûkemar — one of the larger lakes in the region — directly accessible from the harbour.