The Oyster 565 is well-powered with enough sail area to move in light air, 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 52.3′, the Oyster 565 tops out around 9.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √52.3′ LWL = 9.7 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
19.3
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Comfort Ratio
37.3
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.76
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
3lbs
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
37.3
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
1.76
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° |
4.1 |
5.2 |
5.8 |
6.1 |
| Close Reach60° |
5.0 |
6.3 |
7.0 |
7.3 |
| Beam Reach90° |
6.1 |
7.7 |
8.6 |
9.0 |
| Broad Reach120–135° |
5.6 |
7.1 |
8.0 |
8.3 |
| Run150–180° |
4.5 |
5.7 |
6.4 |
6.6 |
These are simplified estimates based on hull speed (9.7 kts),
SA/D (19.3), 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 Oyster 565 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–18 kts
18–26 kts
26+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–18 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
18–26 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
26+ 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 Oyster 565.
|
Oyster 565 |
Amel 60 |
Jeanneau Yachts 60 |
Oyster 595 |
Swan 58 |
Swan 60 Fd |
| Dimensions |
| LOA |
59.4 |
62.3 |
60.0 |
62.5 |
62.7 |
61.9 |
| LWL |
52.3 |
55.3 |
52.5 |
55.2 |
56.1 |
54.8 |
| Beam |
16.8 |
17.6 |
17.7 |
17.6 |
17.3 |
16.7 |
| Displacement |
56 |
57 |
57 |
67 |
55 |
41 |
| Ballast |
14 |
15 |
20 |
— |
16 |
16 |
| Sail Area |
1 |
— |
1,798 |
— |
— |
2 |
| Performance |
| SA/Disp |
19.3 |
9.0 |
19.3 |
— |
— |
28.0 |
| Bal/Disp |
— |
27.7 |
36.5 |
— |
29.5 |
41.2 |
| Comfort |
37.3 |
34.0 |
34.9 |
— |
— |
26.4 |
| Capsize |
1.76 |
1.82 |
1.84 |
— |
— |
1.94 |
| Hull Speed |
9.7 |
10.0 |
9.7 |
— |
— |
9.9 |