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Sailboat Specifications

Westerly 25

Masthead Sloop · Triple Keel

Designed by Denys A. Rayner · Built by Westerly Marine Ltd. · First built 1964

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LOA 25.08 ft  ·  Beam 7.42 ft  ·  Displacement 4,000.00 lb  ·  Sail Area 275.00 ft²  ·  Masthead Sloop  ·  Triple Keel
About the Westerly 25 Sailboat

A stalwart of British coastal sailing, the Westerly 25 is part of the highly regarded Westerly Marine family, a brand that built its reputation throughout the 1960s and beyond by producing practical, seaworthy GRP cruisers aimed squarely at the weekend and coastal sailor. Designed with accessibility in mind, this compact cruiser offers a solid platform for those looking to explore inshore and coastal waters with confidence. Westerly boats were well known for their robust build quality and sensible, family-friendly layouts, and the 25 is no exception to that tradition. Its modest size makes it manageable for short-handed sailing while still providing enough accommodation for a small crew to spend a night or a weekend aboard in reasonable comfort. The brand's commitment to stability and seakeeping over outright performance means this is a boat that rewards cautious, practical seamanship rather than competitive racing. For a first-time buyer or someone returning to sailing after a break, the Westerly 25 represents an approachable entry point into keelboat ownership, with a strong club following and a history of straightforward maintenance making it an enduringly sensible choice.

Dimensions & Specifications
LOA (Length Overall) 25.08 ft / 7.64 m
LWL (Waterline Length) 21.00 ft / 6.40 m
Beam 7.42 ft / 2.26 m
Max Draft 2.50 ft / 0.76 m
Displacement 4,000.00 lb / 1,814 kg
Ballast 1,450.00 lb / 658 kg
Sail Area (Reported) 275.00 ft² / 25.55 m²
Design & Construction
Hull Type Triple Keel
Rigging Type Masthead Sloop
Construction FG
Designer Denys A. Rayner
Builder Westerly Marine Ltd.
First Built 1964
Last Built 1969
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Frequently Asked Questions

What is the Westerly 25's sail area to displacement ratio?

The Westerly 25 has a Sail Area to Displacement ratio (SA/D) of 17.51. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Westerly 25's comfort ratio?

The Westerly 25 has a Ted Brewer Comfort Ratio of 19.26. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Westerly 25 safe for offshore sailing?

The Westerly 25 has a Capsize Screening Formula value of 1.87. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Westerly 25?

The theoretical hull speed of the Westerly 25 is 6.14 knots, calculated from its waterline length.

How much does a Westerly 25 weigh?

The Westerly 25 has a displacement of 4,000.00 lb and a length overall (LOA) of 25.08 ft.

Who designed the Westerly 25?

The Westerly 25 was designed by Denys A. Rayner, first built in 1964.