The Catalina 309 is moderately powered for comfortable coastal cruising, with acceptable motion comfort for coastal passages, designed for cruising comfort rather than racing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 26.5′, the Catalina 309 tops out around 6.9 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √26.5′ LWL = 6.9 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
167s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
16.4
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
40.8%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
235
Moderate — a good balance of speed and load-carrying ability.
Comfort Ratio
20.5
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
2.15
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
SA/Disp (Calculated)
18.3
Computed from measured I/J/P/E rather than reported sail area.
Pounds/Inch Immersion
1,219lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
20.5
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
2.15
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Catalina 309 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Catalina 309
167s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Catalina 315
167s/nm
Catalina 310
177s/nm
Catalina 30
180s/nm
Hunter 31
183s/nm
Estimated Speed by Wind
Rough boat speed estimates at different true wind speeds and points of sail — derived from hull speed, SA/D, and displacement, not measured polars.
| Point of Sail |
6 kts TWS |
10 kts TWS |
15 kts TWS |
20 kts TWS |
| Close-hauled40–50° |
2.7 |
3.4 |
3.8 |
4.0 |
| Close Reach60° |
3.3 |
4.1 |
4.6 |
4.8 |
| Beam Reach90° |
4.0 |
5.1 |
5.7 |
5.9 |
| Broad Reach120–135° |
3.7 |
4.7 |
5.2 |
5.5 |
| Run150–180° |
3.0 |
3.7 |
4.2 |
4.4 |
These are simplified estimates based on hull speed (6.9 kts),
SA/D (16.4), and empirical efficiency curves — not instrument-measured
polars. Real-world speed varies with sea state, bottom condition, sail trim, and current.
Speeds in gold approach hull speed;
bold gold means near or at hull speed.
Wind Range & Comfort Envelope
Estimated wind ranges for comfortable sailing on the Catalina 309 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–22 kts
22–32 kts
32+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–32 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
32+ kts
Storm conditions. Storm jib or bare poles. Seek shelter if coastal.
How It Compares
Side-by-side with the boats most often cross-shopped against the Catalina 309.
|
Catalina 309 |
Catalina 30 |
Catalina 310 |
Catalina 315 |
Hunter 31 |
| Dimensions |
| LOA |
32.8 |
29.9 |
31.0 |
31.5 |
31.3 |
| LWL |
26.5 |
25.0 |
26.5 |
27.0 |
26.3 |
| Beam |
11.5 |
10.8 |
11.5 |
11.1 |
10.9 |
| Displacement |
9,800 |
10 |
10 |
10 |
9 |
| Ballast |
4,000 |
4 |
4 |
4 |
4 |
| Sail Area |
452 |
446 |
493 |
468 |
458 |
| Performance |
| PHRF |
167 |
180 |
177 |
167 |
183 |
| SA/Disp |
16.4 |
15.2 |
16.7 |
16.1 |
16.2 |
| Bal/Disp |
40.8 |
41.2 |
38.8 |
40.0 |
41.2 |
| Comfort |
20.5 |
24.9 |
22.1 |
22.0 |
22.4 |
| Capsize |
2.15 |
2.00 |
2.12 |
2.06 |
2.05 |
| Hull Speed |
6.9 |
6.7 |
6.9 |
7.0 |
6.9 |