Island Spirit 37 Information, Review, Specs

Sailing Performance & Handling

Under sail, the Island Spirit 37 is described as feeling "light on the water" despite its 6,900 kg displacement. According to editorial assessments by Multihulls World, the boat prioritizes reliable simplicity, utilizing a fractional sloop rig that is manageable for short-handed crews. All primary control lines are led back to a raised helm station, which offers clear sightlines over the coachroof—a critical feature for coastal navigation and docking.

The boat's tracking is aided by fixed keels, which provide a shallow draft of approximately 1.1 meters (3.6 feet), making it ideal for tropical cruising in regions like the Bahamas. While it is not a high-performance racing catamaran, its South African heritage ensures a level of sea-kindliness; most Fortuna-built units were delivered from Cape Town on their own bottoms, crossing the Atlantic as a "sea trial" before reaching their first owners. Sailors often note that the boat maintains a respectable turn of speed as long as it is not overloaded with heavy cruising gear, which can dampen its agility in light air.

Interior Comfort & Variations

The interior of the Island Spirit 37 was considered revolutionary at its launch for its "galley-up" configuration, which places the kitchen on the same level as the salon and cockpit. This layout fosters a social atmosphere and provides the chef with 360-degree views and excellent ventilation. The boat is typically found in two primary configurations:

• Owner’s Version: Features a dedicated owner’s suite in the starboard hull with a private head and separate shower, while the port hull contains two guest cabins.
• Charter Version: A symmetrical four-cabin, two-head layout designed to maximize sleeping capacity for larger groups.

The salon is noted for its connectivity to the cockpit, creating a large, seamless living space when the sliding doors are open. A standout feature of the design is the inclusion of up to 17 opening hatches and portlights, providing superior cross-ventilation that often eliminates the need for air conditioning in tropical climates. The materials used in the South African builds generally lean toward functional durability, with molded fiberglass surfaces accented by wood trim.

The Island Spirit 37 served as the foundation for several sibling models. It was followed by the Island Spirit 400 in 2001 and the redesigned Island Spirit 401 in 2003, which featured a lengthened hull and integrated sugar scoop transoms for easier water access.

Known Issues & Buyer’s Checklist

Prospective buyers should focus their inspections on the following areas common to catamarans of this vintage and build:

• Gelcoat and Hull Finish: Early South African builds are occasionally prone to "crazing" or spider-cracking in the gelcoat, particularly around high-stress areas like the stanchion bases and the transition points of the knuckle hulls.
• Portlight and Hatch Leaks: With 17 opening apertures, the potential for seal failure is high. Buyers should check for water staining on the interior cabinetry and evidence of re-bedding on the deck.
• Rigging and Chainplates: Since many of these vessels have significant blue-water miles, the standing rigging should be meticulously inspected for fatigue. The chainplates are robust but require periodic re-sealing to prevent moisture from entering the core.
• Systems Accessibility: While the systems are "simple," the engine rooms in the aft of each hull can be tight. Check for corrosion on the exhaust elbows and the condition of the sail-drive seals if equipped.
• Winch and Hardware Wear: Heavy use in charter environments often leads to worn gears in the primary winches or sticky throttle cables, both of which are common "gotchas" found during sea trials.

Community & Resources

Owners of these vessels are supported by the Island Spirit Owners Group, an informal but active network that shares technical solutions for everything from hull osmosis to rig tuning. Additionally, technical data and historical context are frequently maintained by the Southwell Yacht Design archives, as Phil Southwell remains a prominent figure in the catamaran design community.

The Verdict

The Island Spirit 37 remains a highly sought-after used catamaran for cruisers who prioritize ventilation, a social layout, and proven offshore capability over modern "condo-cat" aesthetics.

Pros

• Exceptional natural ventilation with 17 opening hatches.
• "Galley-up" layout creates a spacious, social bridge deck.
• Shallow draft allows for extensive coastal and tropical exploration.
• Proven blue-water pedigree with many successful ocean crossings.

Cons

• Interior finishes may feel dated compared to newer European production cats.
• Performance is sensitive to weight; heavy loading significantly impacts speed.
• Older gelcoat often requires cosmetic restoration and compounding.