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Spirit 37 Mcmillan
Designer: Sean Mcmillan  ·  Builder: Spirit Yachts (Uk)  ·  First built: 1994
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About the Spirit 37 Mcmillan

Designed by Sean McMillan and built by the renowned British yard Spirit Yachts from 1994 to 2005, this elegant 37-footer represents traditional wooden boatbuilding at its finest. Spirit Yachts has earned international recognition for their exquisite craftsmanship and attention to detail, making any vessel from their yard a coveted addition to discerning sailors' fleets. The Spirit 37's fractional sloop rig and modern fin keel with bulb and spade rudder configuration deliver impressive performance characteristics. With a sail area to displacement ratio of 27.22, she offers spirited sailing ability while maintaining excellent stability through her 2,205-pound ballast. The comfortable 19.2 comfort ratio indicates this yacht strikes an ideal balance between performance and livability. Her modest 9-horsepower auxiliary engine and 5.48-foot draft make her well-suited for exploring shallow coastal waters and intimate anchorages. The capsize screening formula of 1.65 suggests good offshore capabilities, though her design intent leans toward coastal cruising and club racing rather than extended ocean passages. Built during Spirit Yachts' formative years, the Spirit 37 McMillan showcases the yard's commitment to combining classical aesthetics with contemporary sailing performance, making her equally at home on the race course or weekend cruise.

Core Dimensions
LOA (Length Overall) 37.07 ft / 11.30 m
LWL (Waterline Length) 25.92 ft / 7.90 m
Beam 6.99 ft / 2.13 m
Max Draft 5.48 ft / 1.67 m
Displacement 4,850.17 lb / 2,200 kg
Ballast 2,204.62 lb / 1,000 kg
Sail Area (Reported) 486.00 ft² / 45.15 m²
Design & Construction
Hull Type Fin w/bulb & spade rudder
Rigging Type Fractional Sloop
Construction Wood
Designer Sean McMillan
Builder Spirit Yachts (UK)
First Built 1994
Last Built 2005
Related Sailboats X 372 · J/37 · Swan 371 · Oyster 37 Heritage · Baltic 37
Owner Reviews

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Performance Ratios
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
27.22
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
45.45
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
124.34
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
19.2
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
1.65
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.82 kn
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 647.38 pounds/inch
Engine & Accommodations
Engine Make Yanmar
Engine Model 1GM10
Engine Type Diesel
Horsepower 9
Fuel Capacity 7 gals / 25 L
Water Capacity 13 gals / 50 L
How It Compares

vs. Baltic 37, J/37, Oyster 37 Heritage, Swan 371, X 372

This boat Similar boats
Dimensions
LOA
Spirit 37 Mcmillan ★
37.1 ft
Baltic 37
37.0 ft
J/37
37.0 ft
Oyster 37 Heritage
37.0 ft
Swan 371
37.0 ft
X 372
37.0 ft
LWL
Spirit 37 Mcmillan ★
25.9 ft
Baltic 37
27.3 ft
J/37
30.8 ft
Oyster 37 Heritage
31.3 ft
Swan 371
29.7 ft
X 372
29.5 ft
Beam
Spirit 37 Mcmillan ★
7.0 ft
Baltic 37
12.0 ft
J/37
12.1 ft
Oyster 37 Heritage
12.0 ft
Swan 371
11.4 ft
X 372
11.7 ft
Displacement
Spirit 37 Mcmillan ★
4 lbs
Baltic 37
13 lbs
J/37
12 lbs
Oyster 37 Heritage
14 lbs
Swan 371
16 lbs
X 372
11 lbs
Ballast
Spirit 37 Mcmillan ★
2 lbs
Baltic 37
6 lbs
J/37
4 lbs
Oyster 37 Heritage
6 lbs
Swan 371
5 lbs
X 372
4 lbs
Sail Area
Spirit 37 Mcmillan ★
486 sq ft
Baltic 37
640 sq ft
J/37
641 sq ft
Oyster 37 Heritage
610 sq ft
Swan 371
X 372
593 sq ft
Performance
PHRF Rating (lower = faster)
Spirit 37 Mcmillan ★
Baltic 37
114 s/nm
J/37
75 s/nm
Oyster 37 Heritage
Swan 371
120 s/nm
X 372
95 s/nm
SA / Displacement (higher = more powerful)
Spirit 37 Mcmillan ★
27.2
Baltic 37
18.0
J/37
19.4
Oyster 37 Heritage
16.5
Swan 371
X 372
19.0
Ballast / Disp (higher = stiffer)
Spirit 37 Mcmillan ★
45.5 %
Baltic 37
45.0 %
J/37
40.0 %
Oyster 37 Heritage
Swan 371
35.4 %
X 372
43.1 %
Comfort Ratio (higher = more comfortable offshore)
Spirit 37 Mcmillan ★
19.2
Baltic 37
25.5
J/37
29.0
Oyster 37 Heritage
24.9
Swan 371
X 372
20.6
Capsize Screening (lower = safer)
Spirit 37 Mcmillan ★
1.65
Baltic 37
2.01
J/37
1.67
Oyster 37 Heritage
1.97
Swan 371
X 372
2.10
Displacement / Length (lower = lighter)
Spirit 37 Mcmillan ★
124
Baltic 37
300
J/37
136
Oyster 37 Heritage
Swan 371
273
X 372
195
Hull Speed
Spirit 37 Mcmillan ★
6.8 kts
Baltic 37
7.0 kts
J/37
8.7 kts
Oyster 37 Heritage
7.5 kts
Swan 371
X 372
7.3 kts
Speed Number (higher = faster)
Spirit 37 Mcmillan ★
Baltic 37
1.8
J/37
Oyster 37 Heritage
Swan 371
X 372
3.0
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