The Westcoaster 20 is a rugged, trailerable vessel that traces its lineage to the demanding commercial fishing grounds of Western Australia. Originally produced by Westcoaster Yachts—a builder renowned for its "cray boats" and high-speed commercial hulls—the 20 was designed to provide recreational users with the same industrial-strength build quality found in professional fleets. Primarily encountered as a cuddy cabin powerboat or a heavy-duty trailer sailer, the model is characterized by a high-volume hull, a flared bow to deflect spray, and a layup schedule that favors durability over weight savings. While technical specifications from the manufacturer are no longer hosted on an active primary site, the vessel remains a staple in the secondary market for offshore enthusiasts who prioritize a "little big boat" feel.
Westcoaster 20 Information, Review, Specs

- Make
- Westcoaster
- Model
- 20
- Builder
- Beacon Boats Co. Ltd.
- Designer
- Denys Rayner
- Number Built
- 60
- Production Year(s)
- 1960 - ??
Sailing Performance & Handling
In its sailing configuration, the Westcoaster 20 behaves with the stability of a much larger craft, a direct result of its commercial DNA. Unlike modern, light-displacement trailer sailers that rely on crew weight for stability, the Westcoaster 20 utilizes a significant ballast-to-displacement ratio to maintain an upright posture in choppy coastal conditions. The hull’s generous beam provides ample initial stability, making it a forgiving platform for shorthanded sailors.
Handling is characterized by a deliberate, steady motion through the water rather than high-performance acceleration. In technical terms, its Displacement/Length (D/L) ratio is typically higher than its contemporaries, meaning it "ploughs" through waves rather than skipping over them. According to regional reports from Australian boating journals like Trade-a-Boat, the hull is particularly well-regarded for its "sea-kindliness," showing a lack of the jerky motion often found in lighter 20-footers. Under power, the boat tracks well due to a substantial skeg or shallow keel (depending on the specific sub-model), though its high freeboard can make it susceptible to windage when maneuvering in tight marina berths.
Interior Comfort & Variations
The interior of the Westcoaster 20 is focused on utility and protection from the elements. As a small vessel with an enclosed cabin, it provides a functional "V-berth" arrangement forward, which can typically accommodate two adults for overnight coastal hops. Headroom is modest but sufficient for a boat of this class, often maximized by a slightly raised cabin trunk.
The model saw several variations during its production run. The most common is the "Cuddy" or "Half-Cabin" version, which prioritizes a large, open cockpit for fishing or utility work while providing a dry stowage and sleeping area forward. A more dedicated "Sloop" variant includes a compact galley block and basic shelving, though the finish is generally Spartan, utilizing heavy-grade gelcoat and marine-grade plywood rather than the high-gloss teak found in European cruisers. These variations were often built on the same 20-foot hull platform used for the Westcoaster 18 and 24, allowing the builder to scale the "workboat" aesthetic across their recreational line.
Known Issues & Buyer’s Checklist
Prospective buyers should approach the Westcoaster 20 with a focus on structural integrity, as many of these boats have seen hard use in saltwater environments.
- Deck and Cabin Core: Like many fiberglass boats of its era, the Westcoaster 20 uses a cored deck. High-load areas around the cleats, pulpit, and mast step (on sailing models) should be inspected with a phenolic hammer for signs of delamination or moisture ingress, which is a common "gotcha" for boats stored outdoors.
- Fuel Tank Corrosion: In power-oriented variants, the under-floor fuel tanks—often made of aluminum or stainless steel—can suffer from "poultice corrosion" if salt water has sat against the metal for extended periods. Checking for fuel smells in the bilge is a critical first step.
- Rudder and Pivot Pins: For the trailer sailer version, the rudder gudgeons and the centerboard pivot pin are known wear points. Excessive "slop" or play in the steering or the keel trunk indicates a need for bushing replacement.
- Window Seals: The hardened rubber seals on the forward-facing cabin windows are prone to UV degradation. Leaking windows can lead to rot in the interior cushions and woodwork if not addressed.
Community & Resources
While there is no centralized international class association for the Westcoaster 20, there is a strong regional following in Australia. Technical discussions and restoration logs are frequently hosted by the Trailer Sailer Place and various Western Australian boating communities. Owners often trade tips regarding the specific commercial-grade resins used by the factory and how to best repower these hulls with modern four-stroke outboards.
The Verdict
The Westcoaster 20 is a "ship-shaped" 20-footer that trades agility for a sense of absolute security on the water. It is an ideal choice for the sailor or fisherman who frequently operates in exposed coastal waters where a lighter boat might feel compromised.
Pros
- Exceptionally robust construction with a "commercial" heritage.
- High stability and predictable handling in heavy weather.
- Versatile hull design capable of serving as a fisher, cruiser, or utility boat.
- Excellent spray deflection due to the flared bow and high freeboard.
Cons
- Heavier than most 20-footers, requiring a more substantial towing vehicle.
- Sailing performance is sedate and may lack excitement for racing-oriented owners.
- Spartan interior finish may require upgrades for long-term cruising comfort.
Similar Sailboats
Measurements
Construction & Hull
- Construction Material
- Fiberglass (Plywood Core)
- Hull Type
- Monohull Sailboat
- Keel Type
- Twin
- Rudder
- 1x —
- Ballast
- 600 lbs
- Displacement
- 2000 lbs
- Water Capacity
- -
- Fuel Capacity
- -
Dimensions
- Length Overall (LOA)
- 20 ft
- Waterline Length (LWL)
- 16.5 ft
- Beam
- 6.92 ft
- Draft
- 1.83 ft
- Max Headroom
- -
- Air Draft
- -
Rig & Sails
- Rig Type
- Gunter
- P (Main Luff)
- -
- E (Main Foot)
- -
- I (Foretriangle Height)
- -
- J (Foretriangle Base)
- -
- Forestay Length (est)
- -
- Sail Area
- 188 sqft
Calculations
- Sail Area / Displacement (SA/D) Ratio
- 18.95
- Ballast / Displacement Ratio
- 30
- Displacement / Length Ratio (D/L) Ratio
- 198.76
- Comfort Ratio
- 13.38
- Capsize Screening Formula
- 2.2
- Hull Speed
- 5.44 kn








