The Nantucket Island 38 is moderately powered for comfortable coastal cruising, with a steady, comfortable ride offshore, 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 31.8′, the Nantucket Island 38 tops out around 7.6 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √31.8′ LWL = 7.6 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
171s/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
41.5%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
279
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
33.3
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.79
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
33.3
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
1.79
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 Nantucket Island 38 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Ericson 381
114s/nm
Ericson 38
126s/nm
Panda 38
162s/nm
Nantucket Island 38
171s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
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° |
2.8 |
3.6 |
4.0 |
4.2 |
| Close Reach60° |
3.4 |
4.3 |
4.8 |
5.0 |
| Beam Reach90° |
4.2 |
5.3 |
5.9 |
6.2 |
| Broad Reach120–135° |
3.9 |
4.9 |
5.5 |
5.7 |
| Run150–180° |
3.1 |
3.9 |
4.4 |
4.6 |
These are simplified estimates based on hull speed (7.6 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 Nantucket Island 38 — 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 Nantucket Island 38.
|
Nantucket Island 38 |
Cc 37 |
Ericson 38 |
Ericson 381 |
Odyssey 38 Cole |
Panda 38 |
| Dimensions |
| LOA |
37.6 |
37.6 |
37.7 |
37.5 |
37.6 |
37.6 |
| LWL |
31.8 |
28.8 |
30.5 |
30.5 |
31.8 |
31.5 |
| Beam |
12.1 |
11.7 |
12.0 |
12.0 |
12.1 |
12.0 |
| Displacement |
20 |
14 |
14 |
14 |
20 |
19 |
| Ballast |
8 |
6 |
5 |
6 |
8 |
6 |
| Sail Area |
681 |
670 |
709 |
678 |
681 |
718 |
| Performance |
| PHRF |
171 |
— |
126 |
114 |
— |
162 |
| SA/Disp |
14.8 |
18.3 |
19.6 |
18.4 |
14.8 |
16.2 |
| Bal/Disp |
41.5 |
42.0 |
39.3 |
43.8 |
— |
— |
| Comfort |
33.3 |
26.7 |
24.2 |
24.9 |
33.3 |
32.2 |
| Capsize |
1.79 |
1.93 |
2.00 |
1.98 |
1.79 |
1.80 |
| Hull Speed |
7.6 |
7.2 |
7.4 |
7.4 |
7.6 |
7.5 |