O'DAY 37
Specifications
Hull
| LOA | 37 ft |
| LWL | 30.33 ft |
| Beam | 11.33 ft |
| Draft | 5 ft |
| Displacement | 14,000 lb |
| Ballast | 6,000.4 lb |
| Hull speed1.34·√LWL | 7.4 kn |
Rig & Sails
| Iforetriangle height | 42.5 ft |
| Jforetriangle base | 15.5 ft |
| Pmainsail luff | 36.5 ft |
| Emainsail foot | 14.5 ft |
| FLforestay | 15.5 ft |
| Mainsail | 615.2 sq ft |
| Jib (100%) | 329.4 sq ft |
| Spinnaker | 559.9 sq ft |
Engine
| Universal | M-4040 hpSee all 11 parts → |
About the O'DAY 37
Many were originally sold to charter fleets and sailing schools. Some boats have iron instead of lead ballast. Also built and sold in Brazil as TRINIDAD 37.
Designed by C. Raymond Hunt Associates and built by O'Day Corp. (USA) from 1977–1985, the O'Day 37 is a substantial cruising sloop with 219 hulls produced. Its heavy displacement of 14000.0 lb and fin keel configuration provide a stable, comfortable platform, though owners frequently report structural concerns in the deck core and keel sump areas.
- Best for:
- This boat suits coastal cruisers and weekend sailors who prioritize interior volume and comfort, as evidenced by the high frequency of bimini (80 mentions) and dodger installations (58 mentions). It is less ideal for those seeking a lightweight, performance-oriented racer due to its high D/L ratio of 224.01.
- Bluewater capability:
- With a capsize ratio of 1.88 and a robust displacement of 14000.0 lb, the O'Day 37 possesses the inherent stability for offshore passages, provided the critical structural issues in the deck core and keel sump are thoroughly inspected and repaired.
- Comparables:
- Comparable boats include the Cal 40 and Hunter 40, which share similar production eras and heavy-displacement cruising characteristics. Like the O'Day 37, these designs prioritize interior space and stability over pure speed, often featuring masthead sloop rigs and fin keels.
Performance
ORC Performance Data(1 certificate)
Measured performance data from ORC (Offshore Racing Congress) certificates.
Polar Diagram
Boat speed (kn) vs. true wind angle. Source: ORC
Racing Ratings
Triple Number
ORC Measured
Sail Areas (ORC)
Speed Table (kn)
| TWA \ TWS | 6 | 8 | 10 | 12 | 14 | 16 | 20 |
|---|---|---|---|---|---|---|---|
| 52° | 4.1 | 5.0 | 5.7 | 6.3 | 6.6 | 6.8 | 6.8 |
| 60° | 4.5 | 5.4 | 6.1 | 6.6 | 6.9 | 7.1 | 7.1 |
| 75° | 4.8 | 5.7 | 6.5 | 6.9 | 7.2 | 7.3 | 7.5 |
| 90° | 4.8 | 5.7 | 6.5 | 7.0 | 7.3 | 7.5 | 7.8 |
| 110° | 4.4 | 5.4 | 6.3 | 6.9 | 7.2 | 7.5 | 8.0 |
| 120° | 4.1 | 5.1 | 6.0 | 6.7 | 7.1 | 7.4 | 7.9 |
| 135° | 3.6 | 4.6 | 5.4 | 6.2 | 6.8 | 7.2 | 7.7 |
| 150° | 3.1 | 4.1 | 4.9 | 5.6 | 6.3 | 6.8 | 7.4 |
| Beat VMG | 2.6 | 3.2 | 3.6 | 4.0 | 4.3 | 4.4 | 4.5 |
| Run VMG | 2.7 | 3.5 | 4.3 | 5.0 | 5.7 | 6.3 | 7.1 |
Estimated Value
Low ConfidenceAsking price by model year
10 listings · boat years 1978–1983 · median $32,500
Each dot is one listing · hover for details · dashed red line marks the median · obvious data-entry outliers (top & bottom 2.5%) excluded.
Estimated Cost of Ownership
Based on 37ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
22 reported issues across 8 systems for the O'DAY 37, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a O'DAY 37? 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 22 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
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Engine Parts & Maintenance
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Used sails that fit the O'DAY 37
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