COAST 34
Specifications
Hull
| LOA | 34.33 ft |
| LWL | 28.67 ft |
| Beam | 11.48 ft |
| Draft | 5.5 ft |
| Shoal Draft | 5.0 ft |
| Displacement | 15,750 lb |
| Ballast | 6,399.2 lb |
| Hull speed1.34·√LWL | 7.2 kn |
Rig & Sails
| Iforetriangle height | 45 ft |
| Jforetriangle base | 14.83 ft |
| Pmainsail luff | 41 ft |
| Emainsail foot | 14 ft |
About the COAST 34
Based on an earlier Bruce Roberts design for DIY builders. Sloop or cutter. Clearwater Marine was first builder?. Also known as PASSAGE 34, ROBERTS 341, and WESTCOAST 35. A Pilot House version was also available.
The Coast 34 is a robust cruising cutter designed by Bruce Roberts/Grahame Shannon and built by Cape Marine/Windward Marine Ltd. (CAN) starting in 1980. With a displacement of 15750.0 lb and a comfort ratio of 31.06, this vessel is engineered for stability and seakworthiness, though the exact total hulls built remains unconfirmed in available data.
- Best for:
- This boat is ideally suited for coastal cruisers and those seeking a comfortable, stable platform for extended offshore passages, particularly given its cutter rig configuration and heavy displacement.
- Bluewater capability:
- With a capsize ratio of 1.84 and a D/L ratio of 298.37, the Coast 34 demonstrates strong offshore suitability, backed by a proven fin keel design and a reputation for safe, stable passage-making.
- Comparables:
- Comparable vessels include the Cal 34 and O'Day 36, which share similar displacement ranges and cruising-oriented hull forms from the same era, offering alternative layouts with comparable seakeeping characteristics.
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° | 4.0 | 4.8 | 5.3 | 5.8 | 6.2 | 6.4 | 6.5 |
| 60° | 4.3 | 5.1 | 5.7 | 6.2 | 6.5 | 6.7 | 6.8 |
| 75° | 4.5 | 5.3 | 6.0 | 6.4 | 6.7 | 6.9 | 7.1 |
| 90° | 4.5 | 5.3 | 6.0 | 6.5 | 6.8 | 7.0 | 7.4 |
| 110° | 4.1 | 5.0 | 5.7 | 6.3 | 6.7 | 6.9 | 7.4 |
| 120° | 3.9 | 4.8 | 5.5 | 6.2 | 6.6 | 6.8 | 7.3 |
| 135° | 3.4 | 4.3 | 5.0 | 5.7 | 6.3 | 6.7 | 7.1 |
| 150° | 3.0 | 3.9 | 4.6 | 5.3 | 5.9 | 6.4 | 6.9 |
| Beat VMG | 2.5 | 3.0 | 3.4 | 3.7 | 4.0 | 4.2 | 4.3 |
| Run VMG | 2.6 | 3.4 | 4.2 | 4.8 | 5.4 | 6.0 | 6.7 |
Pricing
We don't have market pricing data for the COAST 34 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 34.33ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
9 reported issues across 7 systems for the COAST 34, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a COAST 34? 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 9 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 COAST 34?
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: Yanmar, Bukh, Universal, Perkins — is it one of these?
Already know your engine? Search all engines → to find its exact parts.
Used sails that fit the COAST 34
Checking eBay for sails sized to this boat's rig…