Catalina 16.5 vs Catalina 18
How do the Catalina 16.5 and Catalina 18 compare? Below, their dimensions, displacement, sail area and the standard design ratios side by side, followed by a data-driven summary.
Catalina 16.5 
Catalina 18 | Catalina 16.5 | Catalina 18 | |
|---|---|---|
| Length overall | 16.3 ft4.98 m | 18.0 ft5.49 m |
| Waterline length | 15.7 ft4.78 m | 16.3 ft4.98 m |
| Beam | 7.0 ft2.13 m | 7.6 ft2.31 m |
| Draft | 4.4 ft1.35 m | 2.3 ft0.71 m |
| Displacement | 430 lb195 kg | 1,500 lb680 kg |
| Ballast | —— | 425 lb193 kg |
| Sail area | 150 ft²13.9 m² | 151 ft²14.0 m² |
| SA / Displacement | 42.13 | 18.44 |
| Displacement / Length | 50 | 154 |
| Comfort ratio | 3.1 | 9.3 |
| Capsize screening | 3.71 | 2.65 |
| Hull speed (kn) | 5.3 | 5.4 |
Catalina 16.5 vs Catalina 18: the short version
- The Catalina 18 is the larger boat at 18.0 ft5.49 m LOA versus 16.3 ft4.98 m for the Catalina 16.5.
- The Catalina 18 is heavier, displacing about 249% more, which usually means a steadier but slower-to-accelerate hull.
- On sail area/displacement the Catalina 16.5 carries the more powerful rig (42.1 vs 18.4), favouring lighter-air performance.
- The Catalina 18 scores higher on the Brewer comfort ratio, suggesting an easier motion in a seaway.
- By the capsize screening formula the Catalina 18 rates better for offshore work (2.65 vs 3.71).
Ratios are guidelines computed from published specs; condition, layout and gear matter as much as the numbers.