The Wasa 370 is well-powered with enough sail area to move in light air, with acceptable motion comfort for coastal passages.
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 29.7′, the Wasa 370 tops out around 7.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √29.7′ LWL = 7.3 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
19.1
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Comfort Ratio
23.0
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.91
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
23.0
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
1.91
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 Wasa 370 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
J/37
75s/nm
X 372
95s/nm
Wasa 37
132s/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° |
3.1 |
3.9 |
4.3 |
4.5 |
| Close Reach60° |
3.7 |
4.7 |
5.3 |
5.5 |
| Beam Reach90° |
4.6 |
5.8 |
6.5 |
6.7 |
| Broad Reach120–135° |
4.2 |
5.3 |
6.0 |
6.2 |
| Run150–180° |
3.4 |
4.3 |
4.8 |
5.0 |
These are simplified estimates based on hull speed (7.3 kts),
SA/D (19.1), 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 Wasa 370 — 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 Wasa 370.
|
Wasa 370 |
Catalina 37 |
J/37 |
Najad 361 |
Wasa 37 |
X 372 |
| Dimensions |
| LOA |
36.8 |
36.9 |
37.0 |
36.7 |
36.7 |
37.0 |
| LWL |
29.7 |
31.5 |
30.8 |
30.4 |
28.9 |
29.5 |
| Beam |
10.6 |
12.3 |
12.1 |
11.5 |
10.3 |
11.7 |
| Displacement |
11 |
16 |
12 |
16 |
11 |
11 |
| Ballast |
4 |
6 |
4 |
7 |
5 |
4 |
| Sail Area |
589 |
641 |
641 |
— |
603 |
593 |
| Performance |
| PHRF |
— |
— |
75 |
— |
132 |
95 |
| SA/Disp |
19.1 |
15.8 |
19.4 |
— |
18.7 |
19.0 |
| Bal/Disp |
— |
40.0 |
40.0 |
42.7 |
46.8 |
43.1 |
| Comfort |
23.0 |
19.2 |
29.0 |
— |
26.0 |
20.6 |
| Capsize |
1.91 |
2.16 |
1.67 |
— |
1.82 |
2.10 |
| Hull Speed |
7.3 |
7.4 |
8.7 |
— |
7.2 |
7.3 |