MORGAN 31 (LAVRANOS)
Specifications
Hull
| LOA | 30.52 ft |
| LWL | 25 ft |
| Beam | 10.33 ft |
| Draft | 4.76 ft |
| Displacement | 11,984 lb |
| Ballast | 3,888.8 lb |
| Hull speed1.34·√LWL | 6.7 kn |
Rig & Sails
| Iforetriangle height | 40.19 ft |
| Jforetriangle base | 13.32 ft |
| Pmainsail luff | 35.1 ft |
| Emainsail foot | 12.53 ft |
| FLforestay | 13.3 ft |
| Mainsail | 505.2 sq ft |
| Jib (100%) | 267.7 sq ft |
| Spinnaker | 455 sq ft |
About the MORGAN 31 (LAVRANOS)
The Morgan 31 (Lavranos) is a heavy-displacement coastal cruiser designed by Angelo Lavranos and built by Morgan Mosenthal Marine (SA) in 1978. With a displacement of 11984.0 lb and a full/long keel, this vessel prioritizes stability and comfort over speed, reflecting the robust construction standards of its era.
- Best for:
- This boat is best suited for coastal cruisers and those seeking a stable, comfortable platform for family sailing, rather than high-performance racing or extreme bluewater expeditions. Its heavy displacement and full keel make it ideal for owners who value a smooth ride and secure handling in moderate conditions.
- Bluewater capability:
- While the high displacement of 11984.0 lb and low capsize ratio of 1.81 suggest inherent stability, the single production year of 1978 and limited build count indicate a niche market with less documented long-term offshore history compared to mass-produced bluewater cruisers.
- Comparables:
- Comparable boats from the same era include the Cal 30 and the O'Day 30, which share similar displacement characteristics and coastal cruising roles. These vessels offer similar accommodations and heavy-hulled performance, making them direct competitors for buyers seeking a reliable 30-foot cruiser.
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 | 4.8 | 5.4 | 5.9 | 6.1 | 6.3 | 6.3 |
| 60° | 4.4 | 5.1 | 5.8 | 6.1 | 6.3 | 6.5 | 6.5 |
| 75° | 4.6 | 5.4 | 6.0 | 6.3 | 6.5 | 6.6 | 6.8 |
| 90° | 4.5 | 5.3 | 6.0 | 6.3 | 6.6 | 6.8 | 7.1 |
| 110° | 4.3 | 5.1 | 5.8 | 6.3 | 6.5 | 6.7 | 7.2 |
| 120° | 4.0 | 4.8 | 5.6 | 6.1 | 6.4 | 6.7 | 7.1 |
| 135° | 3.5 | 4.4 | 5.1 | 5.8 | 6.2 | 6.5 | 6.9 |
| 150° | 3.0 | 4.0 | 4.7 | 5.3 | 5.9 | 6.3 | 6.7 |
| Beat VMG | 2.6 | 3.2 | 3.6 | 3.9 | 4.1 | 4.2 | 4.3 |
| Run VMG | 2.7 | 3.5 | 4.2 | 4.8 | 5.4 | 5.9 | 6.5 |
Pricing
We don't have market pricing data for the MORGAN 31 (LAVRANOS) 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 30.52ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
3 reported issues across 2 systems for the MORGAN 31 (LAVRANOS), compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a MORGAN 31 (LAVRANOS)? 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 3 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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Which engine powers your MORGAN 31 (LAVRANOS)?
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Used sails that fit the MORGAN 31 (LAVRANOS)
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