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Sailboat Specifications

Irwin 37 1

Masthead Sloop · Fin With Rudder On Skeg

Designed by Ted Irwin · Built by Irwin Yachts · First built 1971

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LOA 37.00 ft  ·  Beam 11.50 ft  ·  Displacement 18,000.00 lb  ·  Sail Area 558.00 ft²  ·  Masthead Sloop  ·  Fin With Rudder On Skeg
About the Irwin 37 1 Sailboat

Launched as part of Irwin Yachts' popular production line during the 1970s, this center-cockpit cruiser represents the Florida builder's commitment to affordable family sailing. The design emphasizes interior volume and comfort over pure performance, making it an attractive option for coastal cruising and extended live-aboard adventures. Built with a moderate displacement hull and fin keel configuration, the boat strikes a reasonable balance between sailing ability and stability. The center cockpit layout provides excellent separation between the main salon and aft cabin, creating a sense of privacy that appeals to cruising couples. Irwin's construction methods focused on keeping costs manageable while delivering a seaworthy platform capable of handling typical coastal conditions. The yacht's spacious interior showcases the builder's understanding of what recreational sailors value most: comfortable accommodations, adequate storage, and easy maintenance access. While not designed for serious offshore passages or racing applications, this model earned a solid reputation among weekend sailors and casual cruisers seeking dependable performance without breaking the budget. The design remains popular in the used boat market, particularly among sailors looking for their first larger cruising yacht.

Dimensions & Specifications
LOA (Length Overall) 37.00 ft / 11.28 m
LWL (Waterline Length) 30.00 ft / 9.14 m
Beam 11.50 ft / 3.51 m
Max Draft 5.50 ft / 1.68 m
Displacement 18,000.00 lb / 8,165 kg
Ballast 6,700.00 lb / 3,039 kg
Sail Area (Reported) 558.00 ft² / 51.84 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Ted Irwin
Builder Irwin Yachts
First Built 1971
Last Built 1975
Related Sailboats Irwin 37 2 · Tartan 37 · Endeavour 37 · Gulfstar 37 · Esprit 37
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Engine & Accommodations
Horsepower 40
Fuel Capacity 80
Water Capacity 50
Frequently Asked Questions

What is the Irwin 37 1's sail area to displacement ratio?

The Irwin 37 1 has a Sail Area to Displacement ratio (SA/D) of 13.05. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Irwin 37 1's comfort ratio?

The Irwin 37 1 has a Ted Brewer Comfort Ratio of 33.51. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Irwin 37 1 safe for offshore sailing?

The Irwin 37 1 has a Capsize Screening Formula value of 1.76. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Irwin 37 1?

The theoretical hull speed of the Irwin 37 1 is 7.34 knots, calculated from its waterline length.

How much does a Irwin 37 1 weigh?

The Irwin 37 1 has a displacement of 18,000.00 lb and a length overall (LOA) of 37.00 ft.

Who designed the Irwin 37 1?

The Irwin 37 1 was designed by Ted Irwin, first built in 1971.