Westerly 31 (Longbow & Berwick)

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Design No. 0603

Built for: Various owners
Builder:  Westerly marine Construction Ltd,. Waterlooville, England
Date designed: 1971

Class – Hull Number   Westerly 31 – No. 1

Principal Design Data

L.O.A: 31’  0” ( 9.54 m)
Datum: 24’ 0” ( 7.30 m)
Beam Max: 9’ 6″ ( 2.98 m)
Draft: 4′ 6” ( 1.46 m)
Displacement tons: 4.19
T.M.: 8.75 tons
Ballast ratio: 45.5%
Sail Area: 383 sq. ft    (400 sq. ft)
Rig: Bermudan sloop        (Bermudan ketch)

Following the initial success of Centaur and Pageant it was inevitable that Westerly Marine, under the Managing Directorship of David Sanders would request a larger model, and with greater variations: ketch or sloop rigs, twin or single keels and of course aft or centre cockpit arrangements, the latter offering a reasonably comfortable aft twin cabin. Hence the Westerly 31 range was born: Longbow and Berwick, and a year later Renown and Pentland (design number 0635).

Described in yachting World as ingenious design she continued the immensely successful Giles/Westerly theme of good solid spacious cruisers and the 31 was indeed big enough to provide good accommodation without becoming (by the then standards) too boxy looking. She had the weight and capacity to stay at sea for long extended passages and can be motor-sailed effectively. In the 1970’s and early 80’s there were few production yachts to equal the Westerly 31 in terms of accommodation and performance.

If you currently own a Westerly 31 please do contact us.


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Additional Information

Individual Drawing Copies

Please download and print the drawings list for the Westerly Longbow, Individual plan copies cost $85.00 which includes standard airmail. Please contact us using the link for information on how to order.

Download Drawing List

Study Notes

13 page A4 format colour booklet containing many small scale drawings and photographs as well as technical data and an abridged specifications of the Westerly 31 class and all of the options of rigs, keel arrangements and cockpit layouts.

Model Plans

Westerly 31 (Longbow & Berwick)

Full set of Stock Building Plans


A replica of the Westerly Longbow can be constructed from the original 1971 drawings, or if preferred using strip plank construction for which full lofting, construction, rigging and outfit drawings will be provided.

Poster & Art Prints