Design and Construction
The Sou'wester 42 is built of hand-laid fiberglass, often cored with Airex foam for added strength and insulation, and carries a fin keel with a skeg-mounted rudder — though documented variations exist beyond that baseline. Buyers could specify a standard deep fin at 7 feet 0 inches, a shoal draft version as shallow as 5 feet 0 inches, or a centreboard option reaching 9 feet 1 inches maximum. That range of underwater profiles, paired with the fact that boats were often built on a custom basis so interior details could vary significantly, tells you this was a semi-bespoke platform rather than a fixed mold repeat. The hull's 24,000 lb displacement and 8,500 lb lead ballast give a ballast-displacement ratio of 35.42 percent, a figure the design ratios translate into good initial stability and resistance to heeling for a cruiser of this type.
Rig and Handling
The primary rig was a masthead sloop or cutter, with a 54 foot 3 inch foretriangle height and 47 foot 3 inch mainsail luff defining a 817 square foot working sail area. A sail-area-to-displacement ratio of 15.77 places her in the mid-range of moderately performing cruisers — capable in varied winds without being a racer — while a displacement-length ratio of 351.09 puts the 42 in the heavy-displacement category, implying a robust build, offshore comfort, and useful carrying capacity. The comfort ratio of 36.99 and a capsize screening figure of 1.74, well under the 2.0 offshore threshold, support the reading of a very stable, seaworthy cruiser that is likely to reach her 7.49-knot hull speed efficiently.
Accommodations
A standard layout slept up to seven, but because the boats were often custom, the details shifted from hull to hull. Common threads included a V-berth forward, a head accessible from both the forward cabin and the main salon, and a main salon with pull-out settee berths, pilot berths, and a drop-leaf table. The galley was U-shaped, and owners could choose interior finishes such as varnished mahogany or ash. That combination of a shared spatial grammar with per-boat variation means a shopper must inspect the actual interior rather than assume a uniform plan.
Known Issues
The source material documents no structural defect, systemic failure, or safety-relevant known issue for the Sou'wester 42 beyond the acknowledged variations in keel and rudder configuration and the custom-build variance in interiors. There is no recorded drainage problem, flooding path, or quantified defect measurement in the available records, so any used-boat concern must come from normal survey practice rather than a documented class weakness.
Refits and Ownership
The MkII introduced in 1995 modified the keel, rudder, transom, and interior layout and stretched both waterline and overall length slightly versus the original. For an owner, the custom-build nature means refits often align to the specific hull's layout choices rather than a single factory standard. Tankage was generous for the era, with water at 150 or 160 gallons and fuel at 60 or 55 gallons, supporting extended cruising without immediate service upgrades.
The Verdict
The Sou'wester 42/43 is a limited-production, custom-leaning offshore cruiser with conservative but proven numbers: heavy displacement, a reassuring capsize screen, and a comfortable motion profile. The semi-bespoke interior and multiple keel options make hull-to-hull comparison essential, but the design ratios and construction summary describe a stable, capable cruiser rather than a compromised one.
Pros
- Very stable and seaworthy per design ratios, with capsize screen well below offshore threshold
- Multiple draft options including shoal and centreboard for cruising flexibility
- Custom interiors with generous tankage and recognizable Sou'wester layout grammar
Cons
- Only 46 built, so finding a specific layout or keel configuration takes patience
- Custom-build variance means no two interiors are guaranteed identical
- Heavy-displacement profile favors comfort over outright speed
