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Gulfstar 63
Designer: R. C. Lazzarra  ·  Builder: Gulfstar Yachts  ·  First built: 1986
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About the Gulfstar 63

Building on Gulfstar's reputation for producing solid, affordable cruising yachts, this 63-footer represents the larger end of the builder's range during their active production years. Gulfstar Marine established itself as a manufacturer focused on practical, seaworthy vessels designed for serious cruising sailors who valued substance over flash. This substantial yacht was engineered for extended offshore passages and comfortable liveaboard cruising. The design philosophy emphasized seaworthiness, interior volume, and construction quality rather than racing performance. Like other Gulfstar models, the 63 likely featured a traditional full keel configuration that provided directional stability and protected the propeller and rudder during groundings. The spacious interior accommodations would have been a standout feature, offering multiple staterooms and generous common areas suitable for extended voyaging or full-time living aboard. Gulfstar's approach to yacht building focused on creating boats that could handle serious ocean work while providing the comfort and storage capacity needed for long-distance cruising. While detailed specifications remain limited, this model would appeal to experienced sailors seeking a proven platform for world cruising, particularly those who prioritize seaworthiness and interior space over cutting-edge performance characteristics.

Core Dimensions
LOA (Length Overall) 63.00 ft / 19.20 m
LWL (Waterline Length) 51.50 ft / 15.70 m
Beam 16.18 ft / 4.93 m
Max Draft 6.83 ft / 2.08 m
Displacement 68,000.00 lb / 30,844 kg
Ballast 23,000.00 lb / 10,433 kg
Sail Area (Reported) 1,450.00 ft² / 134.71 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Ketch
Construction FG
Designer R. C. Lazzarra
Builder Gulfstar Yachts
First Built 1986
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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
13.99
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
46.96
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
1.59
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. 9.62
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. 2.0
How It Compares

vs. Little Harbor 62, Little Harbor 63, Mason 63

This boat Similar boats
Dimensions
LOA
Gulfstar 63 ★
63.0 ft
Little Harbor 62
62.0 ft
Little Harbor 63
63.8 ft
Mason 63
63.6 ft
LWL
Gulfstar 63 ★
51.5 ft
Little Harbor 62
49.5 ft
Little Harbor 63
48.7 ft
Mason 63
46.7 ft
Beam
Gulfstar 63 ★
16.2 ft
Little Harbor 62
16.3 ft
Little Harbor 63
17.3 ft
Mason 63
16.5 ft
Displacement
Gulfstar 63 ★
68 lbs
Little Harbor 62
91 lbs
Little Harbor 63
65 lbs
Mason 63
64 lbs
Ballast
Gulfstar 63 ★
23 lbs
Little Harbor 62
31 lbs
Little Harbor 63
27 lbs
Mason 63
15 lbs
Sail Area
Gulfstar 63 ★
1 sq ft
Little Harbor 62
1 sq ft
Little Harbor 63
1 sq ft
Mason 63
1 sq ft
Performance
PHRF Rating (lower = faster)
Gulfstar 63 ★
Little Harbor 62
42 s/nm
Little Harbor 63
Mason 63
168 s/nm
SA / Displacement (higher = more powerful)
Gulfstar 63 ★
14.0
Little Harbor 62
15.1
Little Harbor 63
19.3
Mason 63
15.9
Comfort Ratio (higher = more comfortable offshore)
Gulfstar 63 ★
47.0
Little Harbor 62
64.1
Little Harbor 63
42.6
Mason 63
46.0
Capsize Screening (lower = safer)
Gulfstar 63 ★
1.59
Little Harbor 62
1.46
Little Harbor 63
1.72
Mason 63
1.65
Hull Speed
Gulfstar 63 ★
9.6 kts
Little Harbor 62
9.4 kts
Little Harbor 63
9.4 kts
Mason 63
9.2 kts
Speed Number (higher = faster)
Gulfstar 63 ★
Little Harbor 62
1.4
Little Harbor 63
2.1
Mason 63
1.5
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