Herreshoff 31 Information, Review, Specs

Herreshoff 31 Drawing
Make
Herreshoff
Model
31
Builder
Cat Ketch Corp.
Designer
Halsey Herreshoff
Number Built
100
Production Year(s)
1979 - 1986

The Herreshoff 31 stands as the quintessential expression of the Cat Ketch Corporation’s mission to simplify cruising without sacrificing the aesthetic pedigree of the Herreshoff name. Designed by Halsey Herreshoff and produced between 1979 and 1986, the model was the flagship of a movement that sought to modernize the traditional cat-ketch rig using contemporary materials. With approximately 100 units produced, it remains the most prolific model from the Honduras-based yard, offering a distinct alternative to the sloop-dominated coastal cruising market of the 1980s. The vessel is characterized by its unstayed masts, a sharp entry, and a surprisingly commodious interior for its length, aiming to provide a "stress-free" sailing experience for couples or small families.

Sailing Performance & Handling

The defining characteristic of the Herreshoff 31 is its cat-ketch rig, which features two unstayed masts—a larger mainmast forward and a slightly smaller mizzen mast stepped further aft. This configuration eliminates the need for standing rigging, spreaders, and chainplates, which significantly reduces windage and maintenance. Because the masts are free to flex, they act as a natural gust-absorption system, spilling wind at the tip during heavy puffs.

Under sail, the 31 is remarkably well-balanced. It is often noted for its ability to be steered with "two fingers" on the tiller or wheel, as the center of effort is distributed across two smaller sails rather than one large genoa and main. While it lacks the upwind "pointing" ability of a modern fin-keeled sloop, its off-the-wind performance is exemplary. The ability to sail "wing-and-wing" with the main and mizzen set on opposite sides makes for stable, easy downwind runs. Technical assessments from the era, such as those historically archived by the Herreshoff Marine Museum, suggest the boat was designed for coastal passages where ease of reefing and sail handling were prioritized over raw speed or racing metrics. The absence of a headsail means there are no heavy winches to grind during tacks, making it a favorite for solo sailors or those with limited physical strength.

Interior Comfort & Variations

The Herreshoff 31 utilizes its 31-foot length more effectively than many contemporary designs by adopting an "open-plan" philosophy. The interior is notably devoid of the claustrophobic bulkheads found on many 30-footers of the time. The layout typically features a large U-shaped settee forward that doubles as a dining area and a massive V-berth. The galley and a surprisingly spacious head are located aft, near the companionway, which is an ergonomic choice that keeps the "working" parts of the boat close to the cockpit.

Rich wood accents—a hallmark of John Newton’s influence—are prevalent throughout. While the 31 was the most popular, its siblings offered variations on this theme. The smaller Herreshoff 27 provided a more minimalist "pocket cruiser" experience, while the Herreshoff 35 and the rare 45-foot variant introduced dedicated private cabins and expanded tankage for serious blue-water voyaging. The Herreshoff 31 effectively sits in the "Goldilocks" zone of the lineup, offering enough displacement to feel secure in a seaway while remaining small enough for simple maintenance.

The Herreshoff 31 maintains a niche but loyal cultural presence, frequently appearing in lists of "best alternative cruisers" in publications like Practical Sailor and Good Old Boat. Its most significant institutional endorsement comes from the Herreshoff Marine Museum in Bristol, Rhode Island, which has historically accepted donations of these specific models for restoration and resale to support the museum's mission. This connection to the Herreshoff legacy ensures that the model is viewed as a "modern classic" rather than just a production fiberglass boat.

Known Issues & Buyer’s Checklist

Purchasing a Herreshoff 31 requires a specific focus on the unique stressors of an unstayed rig. Prospective buyers should prioritize the following areas during a survey:

  1. Mast Partners and Steps: Because the masts are unstayed, the entire load is concentrated at the deck partners and the mast steps at the keel. Structural crazing or compression in these areas is a common "gotcha" that indicates the need for reinforcement.
  2. Deck Core Integrity: Like many boats built in the 1980s, the Herreshoff 31 uses a cored deck. Areas around the mast partners and stanchion bases are prone to moisture ingress if the hardware has not been re-bedded regularly.
  3. Rudder Bearings: Owners on technical forums have frequently noted play in the rudder bearings. The 31’s rudder is under significant load due to the boat's hull shape, and wear in the bushings can lead to a "clunking" sensation at the helm.
  4. Early Spar Materials: While later models featured aluminum or carbon fiber, some very early units were equipped with laminated wooden spars. These require meticulous maintenance and should be inspected for delamination or rot.
  5. Nanni Diesel Parts: Early models often came with Nanni diesel engines. While reliable, sourcing specific marinized parts for older Nanni units in North America can be more challenging than for the Yanmar engines found in later hulls.

Community & Resources

The primary steward for technical history and legacy support for this model is the Herreshoff Marine Museum. While no longer in production, the museum’s involvement in refurbishing these vessels has created a de facto repository of knowledge for owners. Additionally, the broader cat-ketch community, often centered around the "Non-Such" and "Freedom" yacht associations, frequently shares cross-compatible technical advice regarding unstayed mast maintenance and sail trim.

The Verdict

The Herreshoff 31 Cat Ketch is a "sailor’s sailboat" for those who have moved past the desire for racing trophies and seek a tranquil, simplified relationship with the water.

Pros:

  • Ease of Handling: Single-handed sailing is a breeze with no headsails and simple reefing.
  • Aesthetic Appeal: Classic lines and high-quality interior woodwork.
  • Spacious Interior: The open-plan layout feels significantly larger than a traditional 31-foot sloop.
  • Reduced Maintenance: The lack of standing rigging eliminates the need for expensive wire replacements and stay tensioning.

Cons:

  • Upwind Performance: Will not point as high as stayed-rig competitors.
  • Prop Wash: The hull design and rudder placement can make backing under power somewhat unpredictable.
  • Niche Market: Resale can take longer as the cat-ketch rig requires a specific buyer profile.

Measurements

Construction & Hull

Construction Material
Fiberglass/Wood Composite
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Transom-Hung
Ballast
3350 lbs (Lead)
Displacement
7560 lbs
Water Capacity
60 gal
Fuel Capacity
18 gal

Dimensions

Length Overall (LOA)
30.83 ft
Waterline Length (LWL)
27.97 ft
Beam
10.33 ft
Draft
4 ft
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Cat Ketch
P (Main Luff)
34 ft
E (Main Foot)
14 ft
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
393 sqft

Calculations

Sail Area / Displacement (SA/D) Ratio
16.32
Ballast / Displacement Ratio
44.31
Displacement / Length Ratio (D/L) Ratio
154.24
Comfort Ratio
18.07
Capsize Screening Formula
2.11
Hull Speed
7.09 kn