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Opus 34
Designer: Odd Rembert Andersen  ·  Builder: Opus Værft  ·  First built: 1970
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About the Opus 34

Designed as a capable and versatile sailing yacht, the Opus 34 occupies a comfortable place in the cruising market for sailors seeking a well-rounded coastal and offshore companion. Built with a focus on practical performance, this mid-sized sloop offers enough interior comfort for extended passages while remaining manageable for a short-handed crew or family sailing adventures. The Opus 34 carries a reputation as a solid, dependable cruiser that rewards sailors who value seakeeping ability over outright speed. Its hull form is designed to handle a range of conditions with confidence, making it a reasonable choice for those looking to venture beyond sheltered waters without the complexity of a purpose-built offshore racer. While detailed specifications are limited, the Opus 34 appears to be aimed at sailors who want a balanced blend of liveability and sailing performance. Whether navigating coastal passages or tackling more ambitious itineraries, this is a boat that suits the experienced cruiser looking for reliability and ease of handling. Prospective buyers are encouraged to inspect examples closely and consult owner communities for deeper insight into long-term performance and maintenance considerations.

Core Dimensions
LOA (Length Overall) 34.19 ft / 10.42 m
LWL (Waterline Length) 24.02 ft / 7.32 m
Beam 10.40 ft / 3.17 m
Max Draft 5.51 ft / 1.68 m
Displacement 10,582.00 lb / 4,800 kg
Ballast 4,233.00 lb / 1,920 kg
Sail Area (Reported) 409.00 ft² / 38.00 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Masthead Sloop
Construction FG
Designer Odd Rembert Andersen
Builder Opus værft
First Built 1970
Last Built 1982
Owner Reviews

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
 159
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 13.62
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 26.7
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 1.9
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.57
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 892.59
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