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Ocean 33 Westerly
Designer: Ed Dubois  ·  Builder: Westerly Marine Ltd.  ·  First built: 1997
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About the Ocean 33 Westerly

Produced by the well-regarded British builder Westerly Marine, the Ocean 33 is a capable bluewater cruiser that reflects the company's longstanding reputation for building solid, reliable sailboats suited to serious offshore passages. Westerly developed a loyal following among British and European sailors throughout the latter decades of the twentieth century, and the Ocean 33 upholds that tradition with a design focused on seaworthiness and practical cruising comfort. Built for couples or small crews looking to venture beyond coastal waters, the Ocean 33 offers the kind of sturdy construction and sensible layout that inspires confidence on longer passages. Westerly boats are generally known for their robust hulls, well-considered interior arrangements, and a balanced sail plan that makes them manageable in challenging conditions without sacrificing performance on passage. For anyone considering the Ocean 33, its heritage as a purpose-built cruising yacht means it rewards practical seamanship over racing ambition. Prospective buyers would benefit from a thorough survey, as with any vintage bluewater boat, but a well-maintained example represents an accessible entry point into genuine offshore cruising capability.

Core Dimensions
LOA (Length Overall) 33.33 ft / 10.16 m
LWL (Waterline Length) 28.25 ft / 8.61 m
Beam 11.16 ft / 3.40 m
Max Draft 5.50 ft / 1.68 m
Displacement 11,023.00 lb / 5,000 kg
Ballast 4,453.00 lb / 2,020 kg
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Ed Dubois
Builder Westerly Marine Ltd.
First Built 1997
Last Built 2000
Owner Reviews

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Performance Ratios
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
23.02
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
2.01
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. 7.12
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
How It Compares

vs. Island Packet 320, Parker 335, Regatta 330 Westerly

This boat Similar boats
Dimensions
LOA
Ocean 33 Westerly ★
33.3 ft
Island Packet 320
33.3 ft
Parker 335
33.5 ft
Regatta 330 Westerly
33.2 ft
LWL
Ocean 33 Westerly ★
28.3 ft
Island Packet 320
27.0 ft
Parker 335
28.6 ft
Regatta 330 Westerly
30.0 ft
Beam
Ocean 33 Westerly ★
11.2 ft
Island Packet 320
11.8 ft
Parker 335
10.6 ft
Regatta 330 Westerly
11.2 ft
Displacement
Ocean 33 Westerly ★
11 lbs
Island Packet 320
13 lbs
Parker 335
9 lbs
Regatta 330 Westerly
11 lbs
Ballast
Ocean 33 Westerly ★
4 lbs
Island Packet 320
6 lbs
Parker 335
2 lbs
Regatta 330 Westerly
4 lbs
Sail Area
Ocean 33 Westerly ★
Island Packet 320
556 sq ft
Parker 335
570 sq ft
Regatta 330 Westerly
520 sq ft
Performance
SA / Displacement (higher = more powerful)
Ocean 33 Westerly ★
Island Packet 320
15.8
Parker 335
20.4
Regatta 330 Westerly
16.6
Comfort Ratio (higher = more comfortable offshore)
Ocean 33 Westerly ★
23.0
Island Packet 320
27.2
Parker 335
21.0
Regatta 330 Westerly
22.6
Capsize Screening (lower = safer)
Ocean 33 Westerly ★
2.01
Island Packet 320
1.98
Parker 335
2.01
Regatta 330 Westerly
2.00
Hull Speed
Ocean 33 Westerly ★
7.1 kts
Island Packet 320
7.0 kts
Parker 335
7.2 kts
Regatta 330 Westerly
7.3 kts
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