The Seguin 46 is moderately powered for comfortable coastal cruising, with a steady, comfortable ride offshore.
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 33.5′, the Seguin 46 tops out around 7.8 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √33.5′ LWL = 7.8 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
15.8
Moderate sail power — a capable coastal cruiser, not overpowered.
Comfort Ratio
38.0
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.71
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
1lbs
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
38.0
Good offshore comfort — steady enough for multi-day passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.71
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 Seguin 46 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Cambria 44
90s/nm
Little Harbor 46
108s/nm
Oyster 46
135s/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° |
3.0 |
3.8 |
4.2 |
4.4 |
| Close Reach60° |
3.6 |
4.6 |
5.1 |
5.3 |
| Beam Reach90° |
4.4 |
5.6 |
6.2 |
6.5 |
| Broad Reach120–135° |
4.1 |
5.2 |
5.8 |
6.0 |
| Run150–180° |
3.3 |
4.1 |
4.6 |
4.8 |
These are simplified estimates based on hull speed (7.8 kts),
SA/D (15.8), 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 Seguin 46 — 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 Seguin 46.
|
Seguin 46 |
Cambria 44 |
Little Harbor 46 |
Morris 46 |
Oyster 46 |
X 452 |
| Dimensions |
| LOA |
45.8 |
45.9 |
45.7 |
45.9 |
46.0 |
45.7 |
| LWL |
33.5 |
36.3 |
36.5 |
34.5 |
39.6 |
35.3 |
| Beam |
12.8 |
13.5 |
13.8 |
13.0 |
14.0 |
13.9 |
| Displacement |
27 |
28 |
32 |
23 |
31 |
19 |
| Ballast |
— |
11 |
13 |
8 |
12 |
8 |
| Sail Area |
892 |
953 |
966 |
879 |
980 |
1 |
| Performance |
| PHRF |
— |
90 |
108 |
— |
135 |
— |
| SA/Disp |
15.8 |
16.4 |
15.2 |
17.2 |
15.6 |
22.2 |
| Bal/Disp |
— |
40.2 |
42.5 |
36.7 |
40.3 |
— |
| Comfort |
38.0 |
35.3 |
39.0 |
31.5 |
35.4 |
23.8 |
| Capsize |
1.71 |
1.77 |
1.73 |
1.82 |
1.77 |
2.07 |
| Hull Speed |
7.8 |
8.1 |
8.1 |
7.9 |
8.4 |
8.0 |