2026 Cobalt R31 Surf 

2026 Cobalt R31 Surf

The R31 Surf is the perfect fusion of luxury, innovation, and wave-making excellence.

Exterior

Designed to elevate every moment on the water, the R31 Surf combines versatile performance with sophisticated style to deliver a surf experience that’s pure Cobalt.

Arch with Hard Top

This premium top features a fixed tinted glass portal, auto-actuated anchor light, LED RGB interior accent lighting, and accommodates an optional electric awning, and the optional Sandbar speaker system.

Swim Step

Popular and envied, our patented Swim Step lowers below the water line for easy access in and out of the water, is great for lounging, pets, and stows flush within the swim platform surface.

Side Entry Step

Experience easy dock-side boarding with a structurally reinforced starboard side entry step. The stainless steel and rubber tread offers a positive no-slip feel around wet environments

Cobalt Surf System

Cobalt's Surf Series seamlessly integrates Surf Gate™ with a custom-designed surf hull, all powered by Volvo Penta. Nearly all boats in the series employ traditional hard ballast tanks for wave customization. The R31, R33 and  R35 Surf models adopt a streamlined design without ballast tanks. This tailored approach ensures agility and simplicity, redefining expectations for surfing enthusiasts across the entire Surf Series.

What Makes The Cobalt Surf System

Volvo Penta FWD

Cobalt’s Custom Wave Technology begins with the Volvo Penta FWD powertrain, uniquely engineered with forward-facing Duoprops positioned well under the boat for added safety. The counter-rotating props pull the boat through the water rather than pushing it, resulting in better bite, acceleration, and speed in a more efficient, smooth way, increasing fuel economy. Because the Forward Drive is under the boat, there’s less noise and exhaust, meaning more comfort. The adjustment of drive trim is also one of the single biggest factors to quickly adjusting a wave to your liking.

Surf Controls

Driving with the Cobalt Custom Wave Technology couldn’t be easier. Just turn on Speed control. This is the “ON and OFF” for your surf system. Select your rider profile and the system automatically configures the boat per the pre-saved profile setting—ballast, drive trim, speed, surf left or surf right. Cobalt is set up with two starter profiles: Mellow and Steep. These will give you a starting point for setting up your wave. Then when the surfer is ready, put the throttle down and the boat automatically adjusts to the profile surf settings and speed. With a touch of the surf button on the dual Garmin Glass Cockpit touchscreen, the driver can switch the surf wave from right to left, even while underway.

Surf Gate

Surf Gate™ is the dominant surf technology in the industry—and for good reason. Using high-speed hydraulic actuators, Surf Gate™ creates an endless surfable wave on either side of the boat. Just ask the pros—they’ll tell you Surf Gate™ creates the longest, highest, cleanest wave with the best push out there. Get back as far as you want or as close as you want. While several sterndrive brands have models outfitted with ballast and some form of surf mechanism, Cobalt is the only brand that has integrated the best-in-class Surf Gate™ technology with a specifically designed surf hull form and Volvo FWD powertrain to generate the world-class wave that will absolutely rival some of the best competition towboats on the market.

Surf Ballast

Your Cobalt surf boat has multiple hard ballast tanks and can have as much as 2,350 pounds of ballast. The hard ballast tanks allow you to better scale the wake and wave for all ages and ability levels. Remember that additional weight in the boat doesn’t always translate to a good surf wave. The general rule for surfing in a Cobalt is to fill all the ballast tanks in accordance with your boat loading—such as if you have two people in the boat you can fill the ballast all the way up. But if you have 10 people in the boat, perhaps you only need the ballast tanks a quarter full.

Interior

The R31 Surf's sleek lines and contemporary design reveal a deep cockpit and greater freeboard for a more spacious interior and larger bow and cockpit areas.

Prep Galley

This convenient small size galley is ideal for preparing an afternoon snack.  It features an inset walnut charcuterie board, tilting storage compartment, and refrigerator drawer as options.

Programable LED Lighting

LED accent lighting just received an upgrade. This RGB system is full addressable via the Garmin touch-screen controls and can be programed in a wide range of colors and moving patterns.

Watersports Closet

In place of the head, the optional Watersports Closet provides secure, out of sight storage for boards, vests, and other gear.  Board racks fold flat when not in use. Access from both the cockpit or the bow.

Features May Include:

• Cobalt + Garmin
  • Harness the dependability, durability, and capability of Garmin at your helm with our feature rich, high-resolution glass cockpit. Here you'll find advanced navigation, networking and instrumentation technology combine with an intuitive interface to meet the needs of any captain. Get wider viewing angles and superior clarity on the touchscreen with full HD in-plane switching. Experience unparalleled coverage and detail with built-in Garmin Navionics+™ integrated coastal and inland mapping. With SmartMode™ everything is designed to give you quick, one-touch access to the information you need.
  • Saltwater or fresh — no matter where you take to the water, you can trust Garmin marine technology to give you an unsurpassed level of confidence at the helm.
• Harman Kardon Audio System
  • Cobalt has partnered with Harman Kardon to bring their signature sound to the water. Guests can comfortably sit next to any speaker on the boat, guaranteeing a pleasant experience from every seat.. Includes marine ruggedized components and speakers that are classic yet timeless and can handle the harshest conditions–creating a top-tier audio system like none other in the marine industry.
• Side Entry Step
  • Boarding has never been so effortless with Cobalt’s new side-entry step on the starboard side of the boat. The half-height step is a solid, reinforced hull-side opening without being structurally intrusive in anyway. And the heavy-duty hardware ensures years of trouble-free use.
• Splash & Stow™
  • Cobalt’s award-winning Splash & Stow™ eliminates the traditional way of transporting, deploying, and retrieving heavy-duty, yacht-style inflatables. At the quick touch of a button, the inflatable is deployed and connected to the built-in power inflator, leading to hours of fun and enjoyment on the water. Available with either the Splash & Stow™ Inflatable Round Island or Inflatable Long Rectangle Mat.
• Fender Clip Package
  • Cobalt stainless-steel fender clips are a quick mount system installed in the deck at the perfect fender position, so the lines are always set to optimum length. When docking, simply insert the pin into the fitting and you’re done.