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Laurin 31

Designer: Arvid Laurin  ·  Builder: Miguel Solér (Swe)  ·  First built: 1968
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About the Laurin 31

Swedish designer Arvid Laurin created this solid cruising sailboat that exemplifies Scandinavian boatbuilding philosophy from the late 1960s through early 2000s. Built by Miguel Solér in Sweden over a 35-year production run, only 40 hulls were completed, making this a relatively rare find on the used boat market. The Laurin 31's traditional long keel configuration and substantial displacement of over 12,000 pounds with 4,850 pounds of ballast create exceptional directional stability and seaworthiness. Her comfort ratio of 32.17 indicates a motion that favors extended offshore passages over quick coastal hops, while the conservative capsize screening value of 1.65 demonstrates inherent safety margins that blue-water cruisers appreciate. The fractional sloop rig provides versatile sail handling options, particularly valuable when cruising shorthanded. With moderate sail area and a hull speed around seven knots, this design prioritizes seakindliness and crew comfort over raw performance. The fiberglass construction ensures durability with manageable maintenance requirements. This boat suits sailors seeking a capable offshore cruiser that can handle extended passages in varying conditions. Her Scandinavian pedigree shows in the robust construction and practical design details that prioritize safety and reliability over flashy performance numbers.

Core Dimensions
LOA (Length Overall) 31.66 ft / 9.65 m
LWL (Waterline Length) 28.21 ft / 8.60 m
Beam 9.45 ft / 2.88 m
Max Draft 5.31 ft / 1.62 m
Displacement 12,125.00 lb / 5,500 kg
Ballast 4,850.00 lb / 2,200 kg
Ballast Type Iron
Sail Area (Reported) 538.00 ft² / 49.98 m²
Design & Construction
Hull Type Long Keel
Rigging Type Fractional Sloop
Construction FG
Designer Arvid Laurin
Builder Miguel Solér (SWE)
First Built 1968
Last Built 2003
Number Built 40
Associations Laurin Koster
Related Sailboats Najad 320 · Alpha · Evasion 32 Beneteau · Pearson 32 · Fuji 32
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
16.37
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
40
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
241.12
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
32.17
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. 7.12 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. 952.54 pounds/inch
How It Compares

vs. Alpha, Evasion 32 Beneteau, Fuji 32, Najad 320, Pearson 32

This boat Similar boats
Dimensions
LOA
Laurin 31 ★
31.7 ft
Alpha
31.7 ft
Evasion 32 Beneteau
31.8 ft
Fuji 32
31.5 ft
Najad 320
31.8 ft
Pearson 32
31.8 ft
LWL
Laurin 31 ★
28.2 ft
Alpha
24.0 ft
Evasion 32 Beneteau
24.0 ft
Fuji 32
24.8 ft
Najad 320
26.9 ft
Pearson 32
25.0 ft
Beam
Laurin 31 ★
9.5 ft
Alpha
9.8 ft
Evasion 32 Beneteau
9.8 ft
Fuji 32
9.8 ft
Najad 320
10.4 ft
Pearson 32
10.5 ft
Displacement
Laurin 31 ★
12 lbs
Alpha
8 lbs
Evasion 32 Beneteau
12 lbs
Fuji 32
13 lbs
Najad 320
10 lbs
Pearson 32
9 lbs
Ballast
Laurin 31 ★
4 lbs
Alpha
3 lbs
Evasion 32 Beneteau
3 lbs
Fuji 32
4 lbs
Najad 320
4 lbs
Pearson 32
3 lbs
Sail Area
Laurin 31 ★
538 sq ft
Alpha
Evasion 32 Beneteau
524 sq ft
Fuji 32
471 sq ft
Najad 320
477 sq ft
Pearson 32
475 sq ft
Performance
PHRF Rating (lower = faster)
Laurin 31 ★
Alpha
Evasion 32 Beneteau
Fuji 32
246 s/nm
Najad 320
Pearson 32
159 s/nm
SA / Displacement (higher = more powerful)
Laurin 31 ★
16.4
Alpha
Evasion 32 Beneteau
15.5
Fuji 32
13.6
Najad 320
15.7
Pearson 32
17.1
Ballast / Disp (higher = stiffer)
Laurin 31 ★
40.0 %
Alpha
37.8 %
Evasion 32 Beneteau
Fuji 32
35.3 %
Najad 320
44.9 %
Pearson 32
40.4 %
Comfort Ratio (higher = more comfortable offshore)
Laurin 31 ★
32.2
Alpha
Evasion 32 Beneteau
35.4
Fuji 32
36.1
Najad 320
26.1
Pearson 32
23.5
Capsize Screening (lower = safer)
Laurin 31 ★
1.65
Alpha
Evasion 32 Beneteau
1.69
Fuji 32
1.67
Najad 320
1.88
Pearson 32
1.99
Displacement / Length (lower = lighter)
Laurin 31 ★
241
Alpha
265
Evasion 32 Beneteau
Fuji 32
386
Najad 320
247
Pearson 32
268
Hull Speed
Laurin 31 ★
7.1 kts
Alpha
Evasion 32 Beneteau
6.6 kts
Fuji 32
6.7 kts
Najad 320
7.0 kts
Pearson 32
6.7 kts
Speed Number (higher = faster)
Laurin 31 ★
Alpha
Evasion 32 Beneteau
Fuji 32
Najad 320
2.1
Pearson 32
2.0
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