The Graves 37 is moderately powered for comfortable coastal cruising, with acceptable motion comfort for coastal passages, and respectable in club 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 30.7′, the Graves 37 tops out around 7.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √30.7′ LWL = 7.4 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
113s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
17.5
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
41.2%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
251
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
27.6
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.93
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
27.6
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.93
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 Graves 37 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Express 37
72s/nm
J/37
75s/nm
Graves 37
113s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
Tartan 38
114s/nm
Hunter 37
117s/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 |
6.3 |
6.5 |
| Broad Reach120–135° |
4.1 |
5.2 |
5.8 |
6.0 |
| Run150–180° |
3.3 |
4.2 |
4.6 |
4.8 |
These are simplified estimates based on hull speed (7.4 kts),
SA/D (17.5), 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 Graves 37 — 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 Graves 37.
|
Graves 37 |
Express 37 |
Hunter 37 |
J/37 |
Tartan 372 |
Tartan 38 |
| Dimensions |
| LOA |
37.2 |
37.1 |
37.2 |
37.0 |
37.2 |
37.3 |
| LWL |
30.7 |
30.8 |
30.9 |
30.8 |
30.8 |
28.5 |
| Beam |
12.2 |
11.5 |
12.5 |
12.1 |
12.3 |
11.8 |
| Displacement |
16 |
9 |
14 |
12 |
15 |
15 |
| Ballast |
6 |
4 |
5 |
4 |
6 |
7 |
| Sail Area |
698 |
639 |
641 |
641 |
— |
667 |
| Performance |
| PHRF |
113 |
72 |
117 |
75 |
— |
114 |
| SA/Disp |
17.5 |
22.4 |
17.2 |
19.4 |
— |
17.5 |
| Bal/Disp |
41.2 |
46.9 |
40.0 |
40.0 |
42.8 |
— |
| Comfort |
27.6 |
17.9 |
31.8 |
29.0 |
— |
28.4 |
| Capsize |
1.93 |
2.15 |
1.82 |
1.67 |
— |
1.90 |
| Hull Speed |
7.4 |
7.4 |
7.3 |
8.7 |
— |
7.2 |