Seguin 48 Information, Review, Specs

Sailing Performance & Handling

The Seguin 48 is characterized by its versatility and power, particularly in light to moderate air. With a Sail Area to Displacement (SA/D) ratio often exceeding 21.0 in standard configurations, the boat is categorized as a "moderate racer" that manages to avoid the sluggishness common in many blue-water cruisers. The hull design features a relatively slim beam-to-length ratio of 3.54, which, combined with a high ballast ratio of approximately 40%, provides a stiff, predictable motion that resists excessive heeling.

Most hulls were equipped with a centerboard keel—a design choice that allows for a shallow draft of approximately 5.0 to 5.2 feet when retracted, facilitating access to the thin waters of the Bahamas or the Chesapeake. When the board is lowered, however, the tracking and upwind pointing ability are comparable to deep-draft offshore racers. With a Capsize Screening Formula of 1.85, the Seguin 48 is technically qualified for rigorous ocean racing, though most owners prioritize its "Motion Comfort Ratio" of 30.1, which indicates a hull shape designed to dampen the jerky movements of a confused sea, making for a less fatiguing experience for a small crew.

Interior Comfort & Variations

Because Lyman-Morse is fundamentally a custom yard, no two Seguin 48 interiors are identical, though they all share a baseline of exceptional Maine joinery. The typical layout focuses on offshore utility, often featuring the "enclosed" U-shaped galley that remains functional even when the boat is heeled at 20 degrees. High-quality materials such as mahogany or cherry are frequently used for the bulkheads, paired with traditional teak-and-holly soles.

Variations in the model line often focused on the cockpit and deckhouse configuration. While many were built as traditional aft-cockpit sloops, the 48-foot hull provided enough volume for a spacious master cabin aft and a second private stateroom forward, both typically equipped with en-suite heads. Headroom is generous throughout, and the integration of "pilot berths" in the main saloon—raised bunks near the center of the boat’s motion—remains a favorite feature for owners who cross oceans, as they provide the most secure sleeping quarters while underway.

Popular Mentions & Media

The Seguin lineage holds a storied place in American yachting history, largely due to the voyages of the builder himself. Cabot Lyman, founder of Lyman-Morse, famously circumnavigated the globe with his family aboard Chewink, a Seguin 49 (a close sibling to the 48). This voyage was extensively documented in SAIL Magazine, cementing the Seguin brand as a premier choice for self-reliant voyaging. The Seguin 44 Thistle also gained notoriety in the racing circuit, winning its class in the 2003 Marion-Bermuda Race, further validating the performance credentials of the series.

Known Issues & Buyer’s Checklist

Prospective buyers of a Seguin 48 should treat the acquisition as a "classic yacht" survey, focusing on the longevity of its high-end systems:

• Deck Core Integrity: Many Seguins utilized teak decks laid over fiberglass-encapsulated plywood or balsa cores. Over several decades, if the teak fasteners were not perfectly maintained, moisture can migrate into the core. A thorough moisture meter test of the side decks is essential.
• Centerboard Trunk: The pivoting centerboard mechanism requires inspection for pivot pin wear and the condition of the lifting cable. Barnacle growth or sediment within the trunk can also lead to jamming if the boat has been idle.
• Standing Rigging: Many of these yachts were originally rigged with Navtec rod rigging. While durable, rod rigging has a definitive fatigue life (typically 15-20 years for offshore use) and should be inspected for "cold-headed" terminal cracks.
• Tankage: The Seguin 48 features substantial fuel and water capacity (often over 200 gallons each). Given the age of the vessels, the aluminum or stainless steel tanks should be inspected for localized pitting, especially if they are foamed in place.

Community & Resources

Support for the Seguin 48 is primarily centered around the original builder, as Lyman-Morse maintains an active service department and extensive archives for their legacy models. Owners often coordinate through informal groups or rely on the technical expertise of the Sparkman & Stephens design office, which continues to provide historical data and performance plans for the S&S-designed siblings in the Seguin line.

The Verdict

The Seguin 48 is a "sailor's sailboat," built for those who value the aesthetics of the 1980s New England design era but demand modern offshore performance.

Pros:

• Exceptional build quality from one of America's premier custom yards.
• Centerboard configuration offers go-anywhere versatility.
• Predictable, sea-kindly motion for long-distance voyaging.

Cons:

• High maintenance requirements for exterior brightwork and teak decks.
• Complex systems (centerboards, rod rigging) require specialized service.
• Relatively scarce on the brokerage market due to limited production runs.