The Swan 80 2 S is aggressively canvassed for its weight, 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 72.8′, the Swan 80 2 S tops out around 11.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √72.8′ LWL = 11.4 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
28.9
Performance-oriented — carries a lot of canvas for its weight.
Comfort Ratio
30.1
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.86
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
5lbs
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
30.1
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
1.86
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
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° |
5.4 |
6.8 |
7.6 |
7.9 |
| Close Reach60° |
6.5 |
8.2 |
9.2 |
9.6 |
| Beam Reach90° |
8.0 |
10.1 |
11.3 |
11.4 |
| Broad Reach120–135° |
7.4 |
9.3 |
10.4 |
10.9 |
| Run150–180° |
5.9 |
7.5 |
8.3 |
8.7 |
These are simplified estimates based on hull speed (11.4 kts),
SA/D (28.9), 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 Swan 80 2 S — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–16 kts
16–24 kts
24+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–16 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
16–24 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
24+ 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 Swan 80 2 S.
|
Swan 80 2 S |
Cnb 78 |
Grand Mistral 80 |
Mystic 76 |
Oyster 745 |
Swan 77 |
| Dimensions |
| LOA |
82.3 |
78.5 |
80.4 |
76.0 |
74.6 |
78.8 |
| LWL |
72.8 |
72.8 |
70.8 |
61.7 |
65.7 |
60.3 |
| Beam |
20.0 |
20.0 |
20.3 |
20.9 |
19.4 |
19.7 |
| Displacement |
79 |
105 |
54 |
105 |
118 |
112 |
| Ballast |
39 |
27 |
26 |
38 |
— |
39 |
| Sail Area |
3 |
3 |
— |
2 |
3 |
— |
| Performance |
| SA/Disp |
28.9 |
23.6 |
— |
17.5 |
19.9 |
— |
| Bal/Disp |
— |
26.3 |
49.4 |
— |
— |
35.3 |
| Comfort |
30.1 |
40.5 |
20.5 |
43.0 |
51.9 |
— |
| Capsize |
1.86 |
1.70 |
2.16 |
1.78 |
1.58 |
— |
| Hull Speed |
11.4 |
11.4 |
11.3 |
10.5 |
10.9 |
— |