Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
6.8 kts
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 25.8′, the Westerly 30 tops out around 6.8 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √25.8′ LWL = 6.8 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
231s/nm
Heavy or slow cruiser — all about the journey, not the elapsed time.
Ballast / Displacement
44.0%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
184
Moderate — a good balance of speed and load-carrying ability.
Hull Speed
6.8kts
Pounds/Inch Immersion
5lbs
Weight needed to sink the hull one inch — loading sensitivity.
PHRF Fleet Position
Where the Westerly 30 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Pearson 300
Alberg 30
Westerly 30
Heavy or slow cruiser — all about the journey, not the elapsed time.
How It Compares
Side-by-side with the boats most often cross-shopped against the Westerly 30.
| Westerly 30 | Alberg 30 | Cal 2 30 | Ericson 30 1 | Pearson 300 | Wanderer 30 Pearson | |
|---|---|---|---|---|---|---|
| Dimensions | ||||||
| LOA | 30.2 | 30.3 | 30.2 | 30.3 | 30.3 | 30.3 |
| LWL | 25.8 | 21.7 | 25.0 | 23.3 | 23.3 | 23.3 |
| Beam | 8.7 | 8.8 | 9.0 | 9.5 | 9.3 | 9.3 |
| Displacement | 7 | 9 | 10 | 7 | 10 | 9 |
| Ballast | 3 | 3 | 4 | 3 | 3 | 3 |
| Sail Area | — | 410 | 464 | 410 | 342 | — |
| Performance | ||||||
| PHRF | 231 | 228 | — | — | 223 | — |
| SA/Disp | — | 15.2 | 15.7 | 16.7 | 11.8 | — |
| Bal/Disp | 44.0 | 36.7 | 43.7 | 38.5 | 38.0 | 38.8 |
| Comfort | — | 31.9 | 32.1 | 23.7 | 31.4 | — |
| Capsize | — | 1.69 | 1.66 | 1.92 | 1.72 | — |
| Hull Speed | — | 6.2 | 6.7 | 6.5 | 6.5 | — |