SAN JUAN 21
Specifications
Hull
| LOA | 20.5 ft |
| LWL | 17 ft |
| Beam | 7 ft |
| Draft | 4 ft/ 1 ft min |
| Displacement | 1,250 lb |
| Ballast | 400 lb |
| Hull speed1.34·√LWL | 5.5 kn |
Rig & Sails
| Iforetriangle height | 22.5 ft |
| Jforetriangle base | 8.21 ft |
| Pmainsail luff | 23 ft |
| Emainsail foot | 8.75 ft |
| FLforestay | 8.2 ft |
| Mainsail | 201 sq ft |
| Jib (100%) | 92.4 sq ft |
| Spinnaker | 157 sq ft |
About the SAN JUAN 21
Clark Boat Co. had previously built a number of One-Design Dinghy's, but this was the first 'SAN JUAN' and a huge success. Designed displacement was 1250 lbs. but it was found that most ended up at 1400 lbs. Thanks to Samuel Tricky for providing corrected information for this and number of other boats in this category.
Direct variant of the SAN JUAN 21
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
Estimated Value
Low ConfidenceEstimated Cost of Ownership
Based on 20.5ft LOA. Actual costs vary by condition, usage, and local rates.
Known Issues & Pre-Purchase Inspection
7 reported issues across 5 systems for the SAN JUAN 21, compiled from owner reports in sailing forums and owner-association material.
Unlock the full inspection report
Thinking of buying a SAN JUAN 21? 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 7 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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Used sails that fit the SAN JUAN 21
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