Back to Search
Z 31
Designer: Cde-Danish Marine Design  ·  First built: 2002
+ Add to Compare
About the Z 31

A compact and capable sailboat, the Z 31 offers an accessible entry point for sailors looking to explore coastal and inshore waters with confidence. While detailed specifications remain limited, the Z 31's modest proportions suggest it is well suited to day sailing and weekend cruising, appealing to those seeking a manageable yet rewarding sailing experience. Designed with approachability in mind, the Z 31 is likely to attract newer sailors as well as experienced hands looking for a low-maintenance vessel that still delivers genuine sailing performance. Its size places it firmly in the category of boats that can be handled comfortably by a small crew or even a capable solo sailor, making it a practical choice for those who value independence on the water. Though it may not carry the widespread recognition of more established production sailboats, the Z 31 represents a solid platform for building skills and enjoying relaxed sailing close to shore. Prospective buyers are encouraged to inspect available examples carefully and consult with owners or surveyors to get a fuller picture of this boat's real-world performance and condition.

Core Dimensions
LOA (Length Overall) 30.97 ft / 9.44 m
LWL (Waterline Length) 27.46 ft / 8.37 m
Beam 10.76 ft / 3.28 m
Max Draft 6.89 ft / 2.10 m
Min Draft 3.28 ft / 1.00 m
Displacement 4,916.31 lb / 2,230 kg
Ballast 1,653.47 lb / 750 kg
Sail Area (Reported) 457.47 ft² / 42.50 m²
Design & Construction
Hull Type Swing keel w/dual rudders
Rigging Type Fractional Sloop
Designer CDE-Danish Marine Design
First Built 2002
Owner Reviews

No owner reviews yet — be the first to share your experience with this boat.

Known Issues & What to Watch For

No known issues documented for this model yet.

Own or have surveyed a Z 31? Submit a known issue

Performance Ratios
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
 25.39
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
 11.26
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
 2.53
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. 7.02
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 5.25
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. 1.0
Rig Dimensions
I (Foretriangle Height) 38.22
J (Foretriangle Base) 10.17
P (Mainsail Luff) 37.57
E (Mainsail Foot) 12.99
SA Fore 194.35
SA Main 244.02
Find a Z 31 For Sale
Y YachtWorld Brokerage listings S Sailboat Listings Sailboats only C Craigslist National search F Facebook Marketplace Local listings B boats.com Global marketplace