The Little Harbor 37 is modestly canvassed and unhurried, with a gentle bluewater motion, 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 25.6′, the Little Harbor 37 tops out around 6.8 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √25.6′ 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
171s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
13.9
Modestly canvassed — a comfortable, unhurried cruiser.
Comfort Ratio
44.3
Very comfortable in a seaway — a genuine bluewater motion.
Capsize Screening
1.58
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
960lbs
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
44.3
Very comfortable in a seaway — a genuine bluewater motion.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.58
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 Little Harbor 37 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Little Harbor 37
171s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Endeavour 37
174s/nm
Tartan 37
174s/nm
Black Watch 37
177s/nm
Pacific Seacraft 37
189s/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 |
3.1 |
3.5 |
3.6 |
| Close Reach60° |
3.0 |
3.8 |
4.2 |
4.4 |
| Beam Reach90° |
3.7 |
4.6 |
5.2 |
5.4 |
| Broad Reach120–135° |
3.4 |
4.3 |
4.8 |
5.0 |
| Run150–180° |
2.7 |
3.4 |
3.8 |
4.0 |
These are simplified estimates based on hull speed (6.8 kts),
SA/D (13.9), 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 Little Harbor 37 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–8 kts
8–22 kts
22–30 kts
30+ kts
Ghosting
0–8 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
8–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–30 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
30+ 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 Little Harbor 37.
|
Little Harbor 37 |
Black Watch 37 |
Endeavour 37 |
Pacific Seacraft 37 |
Tartan 37 |
Valiant 37 |
| Dimensions |
| LOA |
37.0 |
37.0 |
37.0 |
36.9 |
37.0 |
37.0 |
| LWL |
25.6 |
25.0 |
30.0 |
27.8 |
25.5 |
31.6 |
| Beam |
10.5 |
10.5 |
11.6 |
10.8 |
10.5 |
11.5 |
| Displacement |
19 |
15 |
20 |
16,000 |
14 |
17 |
| Ballast |
4 |
4 |
8 |
6,200 |
4 |
6 |
| Sail Area |
618 |
597 |
574 |
573 |
654 |
667 |
| Performance |
| PHRF |
171 |
177 |
174 |
189 |
174 |
— |
| SA/Disp |
13.9 |
15.4 |
12.5 |
14.4 |
17.6 |
16.2 |
| Bal/Disp |
— |
27.1 |
40.0 |
38.8 |
— |
39.4 |
| Comfort |
44.3 |
36.6 |
36.9 |
33.8 |
34.0 |
30.6 |
| Capsize |
1.58 |
1.69 |
1.71 |
1.71 |
1.72 |
1.79 |
| Hull Speed |
6.8 |
6.7 |
7.3 |
7.1 |
6.8 |
7.5 |