Seaway 25 Information, Review, Specs

Sailing Performance & Handling

The influence of Doug Peterson is immediately apparent in the Seaway 25’s handling characteristics. As a designer known for IOR (International Offshore Rule) winners, Peterson gave the Seaway 25 a hull shape that excels in upwind tracking and remains remarkably balanced even when pressed. The boat utilizes a vertically lifting "drop keel" rather than a swing keel, which provides a lower center of gravity and superior stiffness compared to many other trailer sailers in its class. This configuration allows the boat to point higher and maintain better stability in "choppy" conditions, a trait often noted in technical retrospectives by Australian sailing journals.

In terms of responsiveness, the boat is known for a sensitive helm that provides immediate feedback to the sailor. While it is stable enough for family outings, it rewards active trimming and tactical weight placement. The sail plan is generous but manageable, often featuring a large masthead rig that provides ample power in light airs—a common condition in many Australian bays. However, because of its relatively light displacement, the boat can become lively in heavy gusts, requiring timely reefing to maintain an upright posture and optimal speed.

Interior Comfort & Variations

The Seaway 25 was produced in two primary iterations: the Mark I and the Mark II. The Mark I, produced from the late 1970s into the early 1980s, featured a lower coachroof profile that favored aesthetics and aerodynamics but limited standing headroom. Recognizing the demand for more "live-aboard" comfort, the builder introduced the Mark II, which incorporated a raised "pop-top" or a higher fixed coachroof depending on the specific production year. This modification significantly increased the interior volume, allowing for roughly 5'10" of headroom when the top was elevated.

The interior layout is a masterclass in small-space optimization. It typically features a V-berth forward, a central dinette that converts into a double berth, and two generous quarter berths extending aft under the cockpit seats. The galley is generally compact, situated near the companionway for ventilation, and equipped with a two-burner stove and a small sink. The use of timber veneers and molded fiberglass liners gives the cabin a clean, durable finish that has aged well. Variations in the Mark II also included improved storage lockers and more refined cabinetry, making it the preferred choice for owners intending to spend long weekends at anchor.

Known Issues & Buyer’s Checklist

When inspecting a Seaway 25, the primary focus must be the keel assembly. Because it utilizes a vertical drop keel, the lifting mechanism—including the winch, wire, and pulleys—is a critical failure point if neglected. Buyers should check for smooth operation and inspect the keel trunk for signs of stress or water ingress.

Another common area of concern is the deck core. Like many boats of this era, the Seaway 25 uses a sandwich construction in the deck; if hardware fittings (such as stanchions or cleats) have not been re-bedded over the decades, water can seep into the core, leading to soft spots. The mast step should also be scrutinized for any compression or hairline fractures in the surrounding fiberglass. Finally, given that these are trailer sailers, the condition of the trailer is often as important as the boat itself; ensure the braking system and rollers are functional, as a seized trailer can lead to significant additional costs.

Community & Resources

The Seaway 25 enjoys a dedicated following, particularly within the Australian Trailer Sailer Association and various regional yacht clubs. While there is no longer a centralized manufacturer website, the Seaway 25 Owners Group and various technical archives preserved by Australian sailing enthusiasts remain the best sources for original sail plans and rigging specifications. Technical discussions and restoration logs are frequently hosted on national sailing forums, where long-term owners share advice on keel maintenance and rig tuning.

The Verdict

The Seaway 25 remains one of the most respected trailer sailers ever produced in the Southern Hemisphere, offering a rare blend of Doug Peterson’s racing DNA and genuine cruising utility.

Pros:

• Performance: Exceptional upwind capability and balance for a 25-foot trailerable boat.
• Versatility: The drop keel allows for shallow-water exploration and easy trailering without sacrificing deep-water stability.
• Market Value: Holds its value well due to a strong reputation for build quality and a dedicated enthusiast base.

Cons:

• Maintenance: The vertical keel trunk and lifting hardware require more frequent inspection than a fixed or swing keel.
• Age: Most units will require some level of deck hardware re-bedding or cosmetic refreshing.
• Headroom: The Mark I model may feel cramped for taller sailors compared to the improved Mark II variant.