The Oday 30 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 25.4′, the Oday 30 tops out around 6.8 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √25.4′ 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
180s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
14.8
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
38.1%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
286
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
25.3
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.97
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
1,097lbs
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
25.3
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
1.97
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Oday 30 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Oday 30
180s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Catalina 30
180s/nm
Oday 32
198s/nm
Oday 25
239s/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° |
2.5 |
3.2 |
3.6 |
3.7 |
| Close Reach60° |
3.0 |
3.8 |
4.3 |
4.5 |
| Beam Reach90° |
3.7 |
4.7 |
5.3 |
5.5 |
| Broad Reach120–135° |
3.5 |
4.4 |
4.9 |
5.1 |
| Run150–180° |
2.8 |
3.5 |
3.9 |
4.1 |
These are simplified estimates based on hull speed (6.8 kts),
SA/D (14.8), 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 Oday 30 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–20 kts
20–28 kts
28+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–28 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
28+ 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 Oday 30.
|
Oday 30 |
Catalina 30 |
Oday 25 |
Oday 27 |
Oday 32 |
| Dimensions |
| LOA |
30.0 |
29.9 |
24.8 |
27.0 |
32.0 |
| LWL |
25.4 |
25.0 |
21.0 |
22.8 |
27.3 |
| Beam |
10.8 |
10.8 |
8.0 |
9.0 |
10.8 |
| Displacement |
10,500 |
10 |
4 |
6,700 |
11,000 |
| Ballast |
4,000 |
4 |
1 |
2,230 |
3 |
| Sail Area |
441 |
446 |
270 |
340 |
470 |
| Performance |
| PHRF |
180 |
180 |
239 |
— |
198 |
| SA/Disp |
14.8 |
15.2 |
17.2 |
15.3 |
15.3 |
| Bal/Disp |
38.1 |
41.2 |
— |
33.3 |
— |
| Comfort |
25.3 |
24.9 |
17.5 |
22.9 |
24.7 |
| Capsize |
1.97 |
2.00 |
2.02 |
1.91 |
1.94 |
| Hull Speed |
6.8 |
6.7 |
6.1 |
6.4 |
7.0 |