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529data points analyzed by Sailpages.com to compile this SEAWIND (ALLIED) buyer’s report
SEAWIND (ALLIED)

SEAWIND (ALLIED)

Allied Boat Co.πŸ‡ΊπŸ‡ΈΒ· Design: Thomas Gillmer
$15,000 avg$15,000 – $15,000 (1 listings)1962–1982161 built
$1.7K – $4.6K est. annual maintenance
Bluewater CruisermonoMasthead KetchFull/Long

Specifications

Hull

LOA30.5 ft
LWL24 ft
Beam9.25 ft
Draft4.2 ft
Displacement12,000 lb
Ballast4,200 lb
Hull speed1.34·√LWL6.6 kn

Rig & Sails

Iforetriangle height35.58 ft
Jforetriangle base13.16 ft
Pmainsail luff31.83 ft
Emainsail foot14.25 ft

About the SEAWIND (ALLIED)

Originally designed for Kaiser Gale Force Yachts which sold the molds to Allied Boat Co. After changing the cabin top and port arrangement, the first boat appeared in 1962. Early builders under contract were Lunn Laminates of Port Washington, NY and F.L. Tripp & Sons, Westport, MA. (Allied eventually had it's own large plant in the Catskills, NY.) The SEAWIND was the first, as well as one of the last, boats built by Allied Boat Company. In 1978 it was brought back into production and actually built simultaneously with the newer SEAWIND II. Also offered with a sloop rig. (with mast stepped farther aft.) I: 35.58'/10.84m J: 13.16'/4.01m P: 31.83'/9.70m E: 14.25'/4.34m

Sailpages Buyer's Take

Designed by Thomas Gillmer and built by Allied Boat Co. (USA) from 1962–1982, the Seawind is a robust 30.5 ft masthead ketch with 161 hulls produced. Its full/long keel and 12000.0 lb displacement provide a stable, traditional cruising platform, though owners frequently report significant maintenance challenges regarding the deck core and keel structure.

Best for:
This boat suits traditional coastal cruisers and those seeking a stable, slow-paced bluewater experience, particularly owners willing to commit to extensive structural maintenance and modern engine/electronics upgrades.
Bluewater capability:
With a low capsize ratio of 1.62, high displacement of 12000.0 lb, and a full/long keel, the Seawind is inherently stable and suitable for offshore passages, provided the critical structural integrity of the deck core and keel is verified.
Comparables:
Comparable boats include the Cal 30 and O'Day 30, which share similar displacement, full-keel designs, and masthead rigging configurations from the same era, offering similar stability and interior volume profiles.

Performance

Comfort36.9
Capsize1.62
SA/Disp15.4
Disp/Len388
Bal/Disp35.0

Market Price

Low
$15,000
Average
$15,000
High
$15,000
Based on 1 listings across 1 marketplace

Estimated Cost of Ownership

Based on 30.5ft LOA. Actual costs vary by condition, usage, and local rates.

$/ft/mo
Annual Maintenance
$1.7K – $4.6K
Hull, rigging, sails, engine service
Annual Docking
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Annual Insurance
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Known Issues & Pre-Purchase Inspection

28 reported issues across 9 systems for the SEAWIND (ALLIED), compiled from owner reports in sailing forums and owner-association material.

8 critical13 major7 minor
Structural5Rigging5Engine5Rudder4Deck4Hull2Keel1Electrical1Plumbing1

Unlock the full inspection report

Thinking of buying a SEAWIND (ALLIED)? This is an in-depth report on the faults this model is known for β€” so you know exactly what to check when you walk the boat. For the price of a coffee.

  • βœ“ All 28 specific issues β€” severity, symptoms & fixes
  • βœ“ Model-specific pre-purchase inspection checklist
  • βœ“ Downloadable PDF to take to your surveyor β€” yours to keep

One-time $2.99 Β· secure checkout by Stripe Β· instant access Β· 30 days online, PDF yours to keep

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Which engine powers your SEAWIND (ALLIED)?

We haven't confirmed the engine for this model yet. If you own or know one, tell us β€” as owners report in, we build an accurate picture over time.

Brands sometimes mentioned for this model: Yanmar, Westerbeke, Bukh, Universal β€” is it one of these?

Already know your engine? Search all engines β†’ to find its exact parts.

Used sails that fit the SEAWIND (ALLIED)

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