EAST COAST 31
Specifications
Hull
| LOA | 31 ft |
| LWL | 24.75 ft |
| Beam | 10.55 ft |
| Draft | 5.5 ft |
| Displacement | 9,500 lb |
| Hull speed1.34·√LWL | 6.7 kn |
Rig & Sails
| Iforetriangle height | 38.5 ft |
| Jforetriangle base | 13.6 ft |
| Pmainsail luff | 34.3 ft |
| Emainsail foot | 11.2 ft |
| FLforestay | 13.6 ft |
| Mainsail | 469.2 sq ft |
| Jib (100%) | 261.8 sq ft |
| Spinnaker | 445.1 sq ft |
About the EAST COAST 31
Designed as IOR 1/2 ton.
Designed by Peter Cole and built by East Coast Yachts (AUS), the East Coast 31 is a rare Australian cruiser with only 1 hull built in 1974. Its unique status as a single-production vessel means owner reports are scarce, with data primarily reflecting general maintenance patterns for similar era Australian designs.
- Best for:
- This boat suits experienced coastal cruisers or single-handlers seeking a lightweight, responsive sloop with a 16.25 SA/D ratio, provided they are prepared for significant structural restoration.
- Bluewater capability:
- With a low capsize ratio of 2.0 and a comfort ratio of 23.91, the hull form suggests moderate offshore capability, but critical structural issues like keel smiles and deck core rot severely limit bluewater readiness without extensive repair.
- Comparables:
- Comparable to other 1970s Australian fin-keel sloops like the O'Day 30 or early Beneteau models due to similar displacement (9500.0 lb) and masthead sloop rigging, though the East Coast 31 is distinct in its Australian origin.
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° | 4.3 | 5.1 | 5.6 | 6.0 | 6.2 | 6.3 | 6.4 |
| 60° | 4.5 | 5.3 | 5.8 | 6.1 | 6.3 | 6.5 | 6.6 |
| 75° | 4.6 | 5.5 | 6.0 | 6.3 | 6.5 | 6.6 | 6.8 |
| 90° | 4.7 | 5.7 | 6.2 | 6.5 | 6.7 | 6.8 | 7.0 |
| 110° | 4.9 | 5.8 | 6.3 | 6.7 | 6.9 | 7.1 | 7.5 |
| 120° | 4.7 | 5.7 | 6.3 | 6.6 | 6.9 | 7.2 | 7.6 |
| 135° | 4.3 | 5.3 | 6.0 | 6.5 | 6.8 | 7.0 | 7.6 |
| 150° | 3.7 | 4.6 | 5.5 | 6.1 | 6.5 | 6.8 | 7.3 |
| Beat VMG | 2.8 | 3.4 | 3.8 | 4.1 | 4.3 | 4.4 | 4.5 |
| Run VMG | 3.2 | 4.0 | 4.8 | 5.4 | 6.0 | 6.3 | 6.9 |
Estimated Value
Limited DataEstimated Cost of Ownership
Based on 31ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
12 reported issues across 7 systems for the EAST COAST 31, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a EAST COAST 31? 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 12 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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