Cobalt R31 Boats For Sale

The Cobalt R31 is a 31-foot 5-inch yacht-certified boat built for big groups and full-day cruising, available as the R31 Surf with forward-facing stern drives and as an outboard-powered Coastal Edition. It carries a 9-foot 10-inch beam, weighs 9,500 pounds dry, and holds 160 gallons of fuel. Because it is yacht certified, there is no fixed passenger capacity — the only requirement is a PFD for everyone aboard, and the cockpit seats roughly a dozen people. Interior width runs about 7.5 feet, giving the cabin and cockpit unusual width for a boat this size. The outboard version draws 26 inches with the engines up and 44 inches with them down, shallow enough for sandbar-to-sandbar running.

Power comes two ways. The R31 Surf runs twin Volvo Penta 380-horsepower forward-facing stern drives for 760 horsepower total, with the props pulling from under the hull rather than pushing from behind, which makes towed watersports safer. The boat generates a surfable wave and a tow point at the transom, and it handles wakeboarding and combo skiing as well, though its strength is cruising rather than dedicated towing. The outboard Coastal Edition is rigged with twin Yamaha 350 V6 engines that push it into the mid-to-low 50s mph. At the 2026 Miami boat show the outboard R31 was priced right at $425,000 with show incentives applied.

The helm is one of the boat's strongest areas, with a two-person electric helm seat, flip-down footrest, bolster, and twin Garmin displays. Controls sit within arm's reach: throttles, an Optimus-style joystick, autopilot, and trim tab adjustment. The joystick spins the boat 360 degrees, crab-walks it sideways, and runs a dedicated docking mode; a single-lever setting consolidates both engines onto one throttle. An autopilot-style function lets you steer by tilting and adjust throttle from the screen without touching the wheel. This year the R31 introduces digital switching through the Garmins, controlling cockpit lights, navigation, docking lights, bilge pumps, water pump, blower, windlass, and the electric seat, backed by traditional push-button switches at the dash and a diagnostics page. Options include a Seakeeper gyro, FLIR vision, and Garmin radar for open-water running.

The deck and cockpit are built around storage and shade. Every cockpit and bow seat lifts to reveal deep molded tubs with cargo netting and hard bases that drain and ventilate wet gear, plus battery switches and the fire extinguisher behind the seatback netting. The hardtop is offered with an electric telescopic hatch, static hard or soft top, a three-position board rack, hidden sandbar speakers under the Platinum sound package, and an electric awning in black or white. The transom has a large platform with an optional hydraulic swim step, convertible rumble seats that face forward or rearward, splash-and-stow inflatable mat with optional air compressor, a transom walk-through gate, and a 10-inch side-entry step. Wireless chargers, USB ports, and cup holders run throughout — ten cup holders in the bow and fifteen in the main seating area — along with an anchor on a windlass operated from the bow or helm.

Below and to the sides, layout choices set the R31 apart. The port side can be ordered as a prep galley with a charcuterie board, refrigerator, phone charger, and a rotating passenger chair, while the starboard side holds a head with a porcelain toilet, sink with faucet, and trash can. Buyers who skip the head can take a watersports closet in its place, open to both the head door and the bow for board storage. The trash can went up to 13 gallons, and the bow features a U-shaped lounge with flip-up armrest seats and table base mounts for both the bow and cockpit. Cobalt's fit and finish is a recurring point of praise — diamond stitching, stainless hardware, and tightly sealed compartments — and the customization list covers gel coat, towers, upholstery, soft-track non-skid, and speaker and subwoofer configuration, making it a strong American-built option to weigh when shopping the R31 for sale.