About Northwater Marine Sales

Northwater Marine Sales — previously known as R&R Marine Supply — is a full-service boat dealership located at 550 E. Portage Ave. in Sault Ste. Marie, Michigan. We are a division of Northwater Marine, Inc., and we've built our reputation on honest advice, premium brands, and a genuine passion for life on the water.

We serve boaters throughout Michigan's Upper Peninsula, Northern Michigan, and the entire Great Lakes region. Whether you're chasing white fish on Lake Superior, cruising the St. Marys River, or exploring the inland lakes of the U.P., we'll help you find the right boat for the right water.

As an authorized dealer for Osprey, SeaSport, C-Dory, Extreme, RH, Starcraft Pontoons, and Fish Rite, we carry one of the most diverse lineups of aluminum, fiberglass, and pontoon boats in the region. Our online boat builder lets you explore models, choose your options, and request a personalized MSRP quote — all before you ever set foot in the showroom.

We believe buying a boat should be exciting, not overwhelming. That's why our team walks you through every option, every upgrade, and every tradeoff so you can make a confident decision. We're not just selling boats — we're helping you build memories on the water.