IRWIN 37-5
Specifications
Hull
| LOA | 37 ft |
| LWL | 30 ft |
| Beam | 11.5 ft |
| Draft | 4 ft |
| Displacement | 20,000 lb |
| Ballast | 7,800 lb |
| Hull speed1.34·√LWL | 7.3 kn |
Rig & Sails
| Iforetriangle height | 42 ft |
| Jforetriangle base | 17.5 ft |
| Pmainsail luff | 35.5 ft |
| Emainsail foot | 12.75 ft |
| PYmizzen luff | 22.16 ft |
| EYmizzen foot | 8.33 ft |
| FLforestay | 17.5 ft |
| Mainsail | 645.5 sq ft |
| Jib (100%) | 367.5 sq ft |
| Spinnaker | 624.8 sq ft |
Engine
| Commonly | Perkins, Yanmar, Westerbeke, Vetus, Ford |
About the IRWIN 37-5
The last iteration of the very popular IRWIN 37. Available with keel/cb. Cutter or staysail ketch. Rig dimensions for ketch: I: 42.0' J: 17.5' P: 35.5' E: 12.75' PY: 22.16' EY: 8.33'
The Irwin 37-5 is a 37.0 ft cutter designed by Ted Irwin and built by Irwin Yachts (USA) in 1982. With a displacement of 20000.0 lb and a comfort ratio of 37.23, this vessel is characterized as a heavy, stable cruiser, though the exact number of hulls built is unknown.
- Best for:
- This boat is best suited for coastal and offshore cruisers who prioritize stability and comfort over high-speed performance, particularly those comfortable with a cutter rig for versatile sail handling.
- Bluewater capability:
- With a displacement of 20000.0 lb, a capsize ratio of 1.7, and a fin keel, the Irwin 37-5 demonstrates strong offshore suitability and stability for bluewater cruising.
- Comparables:
- Comparable boats include the Irwin 37-3 and 37-4, which share the same hull form and designer but differ in rigging configurations and production years, as well as other heavy-displacement 30-35ft cutters from the early 1980s.
Direct variants of the IRWIN 37-5
Near-identical models — same hull, builder and designer, re-badged or lightly changed. Specs and owner-reported issues are typically shared across the group, so a sister model's page may carry detail this one doesn't.
Performance
Pricing
We don't have market pricing data for the IRWIN 37-5 yet. If you own one, help other buyers — what did you pay for it? Reports build a community price estimate over time.
Estimated Cost of Ownership
Based on 37ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
2 reported issues across 2 systems for the IRWIN 37-5, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a IRWIN 37-5? This is an in-depth report on the faults this model is known for — so you know exactly what to check when you walk the boat. For the price of a coffee.
- ✓ All 2 specific issues — severity, symptoms & fixes
- ✓ Model-specific pre-purchase inspection checklist
- ✓ Downloadable PDF to take to your surveyor — yours to keep
One-time $2.99 · secure checkout by Stripe · instant access · 30 days online, PDF yours to keep
Similar Sailboats
Which engine powers your IRWIN 37-5?
We haven't confirmed the engine for this model yet. If you own or know one, tell us — as owners report in, we build an accurate picture over time.
Brands sometimes mentioned for this model: Perkins, Yanmar, Westerbeke, Vetus — is it one of these?
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the IRWIN 37-5
Checking eBay for sails sized to this boat's rig…