Jachthaven Zuidwesthoek is a full-service marina situated on the southwestern shore of Paterswoldsemeer, just south of Groningen in the village of Haren.

With around 500 berths accommodating vessels up to 20 meters, it serves both permanent berth holders and visiting boaters, and offers views across the lake toward the Groningen skyline.

The marina functions as a comprehensive base for water recreation on the Paterswoldsemeer. Facilities include a visitor marina, boat lift, trailer ramp, fuel station (petrol, mixed fuel, and diesel), pump-out installation, showers, laundry, and winter storage.

A boatyard handles repairs and maintenance for sailing and motor vessels.

Boat rental covers sloops, motorboats, sailing dinghies, canoes, kayaks, and SUP boards, and the site includes a watersports shop stocking equipment, paint, life jackets, outboard motors, and boat trailers.