San Juan 28 Information, Review, Specs

Sailing Performance & Handling

The sailing characteristics of the San Juan 28 are defined by its high ballast-to-displacement ratio, which hovers around 45%. This makes the boat exceptionally stiff, allowing it to carry full sail longer than many of its lighter competitors when the breeze freshens. According to editorial assessments by Practical Sailor, the boat is known for being remarkably well-balanced, exhibiting very little weather helm even when pressed.

The hull's relatively flat sections and wide beam contribute to excellent initial stability, though this same width can create additional drag in light air if the boat is not kept upright. Owners often report that the boat "punches above its weight" in heavy weather, tracking predictably through a chop. The rigging is a standard masthead sloop, typically equipped with a large genoa to maximize power. While it may not be as nimble as its smaller sibling, the San Juan 24, the 28 offers a much more "big boat" feel, providing a sense of security during coastal passages that smaller quarter-tonners lack.

Interior Comfort & Variations

The interior of the San Juan 28 was revolutionary for the late 1970s, primarily due to the 10-foot beam which creates an expansive salon. The layout is traditional yet efficient, featuring a V-berth forward, a localized head with a hanging locker, and a main cabin with facing settees. The use of a fold-down table mounted to the bulkhead further opens the floor space, a design choice noted in original Clark Boat Company literature as a key selling point for families.

The San Juan 28 was eventually followed by the San Juan 29. While the two boats share the same hull mold, the 29 featured a modified deck with a "T-shaped" cockpit to better accommodate a large steering wheel and a slightly updated interior arrangement. Some later San Juan 28 models also moved away from the early "short" cabin trunk to a more streamlined profile. Materials inside are typical of the era, utilizing a mix of fiberglass liners and teak trim, which provides a warm aesthetic while remaining relatively easy to maintain.

Known Issues & Buyer’s Checklist

Prospective buyers should approach the San Juan 28 with a focus on its structural longevity, particularly concerning the fiberglass-over-wood core construction common in that era.

• Deck Delamination: Like many boats from the 1970s and 80s, the San Juan 28 uses a balsa-cored deck. Moisture ingress around stanchion bases, chainplates, and the mast step is common. Soft spots on the deck should be checked with a moisture meter and a sounding hammer.
• Mast Step Compression: The mast is deck-stepped, supported by a compression post that transfers the load to the keel. If the wood at the base of this post or within the deck sandwich has rotted, the deck can sag, leading to rig tension issues and door misalignment in the cabin.
• Chainplate Leaks: The chainplates pass through the deck and are bolted to bulkheads. Over time, the sealant fails, leading to water damage in the plywood bulkheads. Structural integrity here is paramount for rig safety.
• Keel Bolts and Rudder Post: Inspect the stainless steel keel bolts for "crevice corrosion," particularly if the boat has been kept in saltwater. Additionally, the spade rudder's internal armature can corrode if water enters the fiberglass shell, leading to potential failure under heavy load.

Community & Resources

The San Juan 28 benefits from an active and dedicated owner base, largely concentrated in the Pacific Northwest and the Mid-Atlantic. Technical support is often found through the San Juan 21 Class Association, which, while focused on the smaller model, maintains historical archives and technical data relevant to the entire San Juan line. Regional clubs often host "San Juan Rendezvous" events, where owners share maintenance tips and design modifications.

The Verdict

The San Juan 28 is a robust, "honest" sailboat that offers a significant amount of living space and performance for its price point on the used market. It is an ideal vessel for a couple or young family looking to transition from daysailing to coastal cruising without sacrificing the joy of a responsive helm.

Pros:

• Exceptional Stability: The high ballast ratio and wide beam make for a stiff, safe-feeling boat.
• Spacious Interior: One of the roomiest 28-footers of its generation, featuring a true "open-concept" salon.
• Performance Heritage: Capable of competitive PHRF racing and excellent upwind pointing.

Cons:

• Aging Core Materials: Susceptibility to deck and bulkhead rot requires careful pre-purchase inspection.
• Engine Access: Access to the inboard engine (commonly a Yanmar or Universal diesel) can be tight for major repairs.
• Light Air Drag: The wide hull carries more wetted surface area than narrower designs, which can hinder performance in very light winds.