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Sailboat Specifications

Seidelmann 34

Masthead Sloop · Fin W/Spade Rudder

Designed by Bob Seidelmann · Built by Seidelmann Yachts · First built 1981

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LOA 34.00 ft  ·  Beam 11.82 ft  ·  Displacement 11,000.00 lb  ·  Sail Area 517.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the Seidelmann 34 Sailboat

A capable and well-regarded American production sailboat, the Seidelmann 34 earned a loyal following among coastal and bluewater cruisers during its production years. Designed by Bob Seidelmann, whose firm produced a range of fiberglass sailboats throughout the 1970s and 1980s, the 34 reflects the practical, performance-oriented sensibility that defined that era of American sailboat building. Known for solid construction and a comfortable below-decks layout, the Seidelmann 34 appeals to sailors looking for a versatile passage-maker that can handle coastal daysailing as comfortably as it can tackle longer offshore passages. The hull design balances stability with reasonable performance under sail, making it approachable for both experienced sailors and those stepping up to a larger cruising platform. Like many boats from this period, the Seidelmann 34 benefits from a devoted owner community, which helps sustain parts availability and collective knowledge — an important consideration for buyers evaluating older fiberglass production boats. For those researching an affordable, seaworthy cruiser with a proven track record, the Seidelmann 34 is well worth a closer look.

Dimensions & Specifications
LOA (Length Overall) 34.00 ft / 10.36 m
LWL (Waterline Length) 26.50 ft / 8.08 m
Beam 11.82 ft / 3.60 m
Max Draft 5.42 ft / 1.65 m
Displacement 11,000.00 lb / 4,990 kg
Ballast 5,000.00 lb / 2,268 kg
Sail Area (Reported) 517.00 ft² / 48.03 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Bob Seidelmann
Builder Seidelmann Yachts
First Built 1981
Related Sailboats Catalina 34 · Oday 34 · J34 · C&C 34 · Olson 34
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Frequently Asked Questions

What is the Seidelmann 34's sail area to displacement ratio?

The Seidelmann 34 has a Sail Area to Displacement ratio (SA/D) of 16.78. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Seidelmann 34's comfort ratio?

The Seidelmann 34 has a Ted Brewer Comfort Ratio of 22.04. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Seidelmann 34 safe for offshore sailing?

The Seidelmann 34 has a Capsize Screening Formula value of 2.13. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Seidelmann 34?

The theoretical hull speed of the Seidelmann 34 is 6.9 knots, calculated from its waterline length.

How much does a Seidelmann 34 weigh?

The Seidelmann 34 has a displacement of 11,000.00 lb and a length overall (LOA) of 34.00 ft.

Who designed the Seidelmann 34?

The Seidelmann 34 was designed by Bob Seidelmann, first built in 1981.