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Sailboat Specifications

Thompson 31

Masthead Sloop · Fin With Rudder On Skeg

Designed by Guy Thompson · Built by Uk · First built 1968

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LOA 31.00 ft  ·  Beam 9.25 ft  ·  Displacement 8,500.00 lb  ·  Masthead Sloop  ·  Fin With Rudder On Skeg
About the Thompson 31 Sailboat

A product of Thompson Brothers Boat Manufacturing, the Thompson 31 is a fiberglass sailboat that emerged during an era when American production builders were bringing affordable sailing to a broader audience. Designed with the weekend cruiser in mind, this boat suits sailors looking for comfortable coastal and inland water sailing rather than offshore passages or competitive racing. With limited specifications widely documented, the Thompson 31 occupies a somewhat obscure corner of vintage production sailboat history, making it a vessel that rewards patient research and hands-on inspection. Buyers drawn to this boat are often attracted by its affordability and the opportunity to get into a 31-foot cruiser without a significant financial commitment. Like many production boats of its era, build quality and condition can vary considerably from one example to the next, so a thorough survey is strongly recommended. The Thompson 31 appeals to sailors who enjoy tinkering and restoring, and it can serve well as a liveaboard or daysailer on protected waters. Finding parts and technical documentation may require some resourcefulness, but a dedicated community of vintage sailboat enthusiasts can often help fill the gaps.

Dimensions & Specifications
LOA (Length Overall) 31.00 ft / 9.45 m
LWL (Waterline Length) 22.00 ft / 6.71 m
Beam 9.25 ft / 2.82 m
Max Draft 5.00 ft / 1.52 m
Displacement 8,500.00 lb / 3,856 kg
Ballast 3,500.00 lb / 1,588 kg
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction FG
Designer Guy Thompson
Builder UK
First Built 1968
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Frequently Asked Questions

What is the Thompson 31's comfort ratio?

The Thompson 31 has a Ted Brewer Comfort Ratio of 27.47. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Thompson 31 safe for offshore sailing?

The Thompson 31 has a Capsize Screening Formula value of 1.82. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Thompson 31?

The theoretical hull speed of the Thompson 31 is 6.29 knots, calculated from its waterline length.

How much does a Thompson 31 weigh?

The Thompson 31 has a displacement of 8,500.00 lb and a length overall (LOA) of 31.00 ft.

Who designed the Thompson 31?

The Thompson 31 was designed by Guy Thompson, first built in 1968.