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Shelter Island 33
Designer: Richard D. Carlson  ·  First built: 1960
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About the Shelter Island 33

A classic American production cruiser, the Shelter Island 33 was built to appeal to sailors seeking a capable and comfortable coastal cruising vessel. Designed with family cruising in mind, this boat strikes a balance between manageable handling and practical liveaboard amenities, making it a solid choice for weekend sailors and those exploring coastal waters along the eastern seaboard and beyond. While detailed specifications on this model are relatively scarce, the Shelter Island 33 carries a reputation as a stable and seaworthy design suited to day sailing and overnight passages in protected and semi-protected waters. Its proportions suggest a boat that prioritizes comfort and ease of handling over outright performance, appealing to sailors who value reliability and simplicity on the water. For buyers researching this vessel, it represents an accessible entry point into the world of mid-sized cruising sailboats. As with many older production designs, examples on the used market can vary significantly in condition, so a thorough survey is strongly recommended. Those who find a well-maintained example often discover a trustworthy and capable coastal companion.

Core Dimensions
LOA (Length Overall) 33.50 ft / 10.21 m
LWL (Waterline Length) 25.00 ft / 7.62 m
Beam 10.25 ft / 3.12 m
Max Draft 5.50 ft / 1.68 m
Displacement 10,200.00 lb / 4,627 kg
Ballast 2,750.00 lb / 1,247 kg
Ballast Type Lead
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Sloop
Construction strip planked.mahogany/Plywood deck.
Designer Richard D. Carlson
First Built 1960
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Known Issues & What to Watch For

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Performance Ratios
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
26.96
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
291.43
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. 5.49 pounds/inch
Rig Dimensions
I (Foretriangle Height) 16.04
P (Mainsail Luff) 470.00 ft² / 43.66 m²
E (Mainsail Foot) Universal
Engine & Accommodations
Horsepower 25
How It Compares

vs. Bristol 33, Columbia 34 Mk Ii, Columbia 34 Mk Ii Sd, Islander 34, Viking 34

This boat Similar boats
Dimensions
LOA
Shelter Island 33 ★
33.5 ft
Bristol 33
33.6 ft
Columbia 34 Mk Ii
33.6 ft
Columbia 34 Mk Ii Sd
33.6 ft
Islander 34
33.6 ft
Viking 34
33.6 ft
LWL
Shelter Island 33 ★
25.0 ft
Bristol 33
26.1 ft
Columbia 34 Mk Ii
27.3 ft
Columbia 34 Mk Ii Sd
28.0 ft
Islander 34
25.0 ft
Viking 34
27.2 ft
Beam
Shelter Island 33 ★
10.3 ft
Bristol 33
10.3 ft
Columbia 34 Mk Ii
10.0 ft
Columbia 34 Mk Ii Sd
10.0 ft
Islander 34
10.0 ft
Viking 34
9.8 ft
Displacement
Shelter Island 33 ★
10 lbs
Bristol 33
12 lbs
Columbia 34 Mk Ii
12 lbs
Columbia 34 Mk Ii Sd
13 lbs
Islander 34
10 lbs
Viking 34
8 lbs
Ballast
Shelter Island 33 ★
2 lbs
Bristol 33
5 lbs
Columbia 34 Mk Ii
4 lbs
Columbia 34 Mk Ii Sd
5 lbs
Islander 34
3 lbs
Viking 34
4 lbs
Sail Area
Shelter Island 33 ★
Bristol 33
469 sq ft
Columbia 34 Mk Ii
526 sq ft
Columbia 34 Mk Ii Sd
Islander 34
471 sq ft
Viking 34
540 sq ft
Performance
PHRF Rating (lower = faster)
Shelter Island 33 ★
Bristol 33
180 s/nm
Columbia 34 Mk Ii
Columbia 34 Mk Ii Sd
Islander 34
147 s/nm
Viking 34
129 s/nm
SA / Displacement (higher = more powerful)
Shelter Island 33 ★
Bristol 33
13.8
Columbia 34 Mk Ii
16.1
Columbia 34 Mk Ii Sd
Islander 34
15.9
Viking 34
20.2
Ballast / Disp (higher = stiffer)
Shelter Island 33 ★
27.0 %
Bristol 33
39.8 %
Columbia 34 Mk Ii
Columbia 34 Mk Ii Sd
43.9 %
Islander 34
31.7 %
Viking 34
Comfort Ratio (higher = more comfortable offshore)
Shelter Island 33 ★
Bristol 33
31.5
Columbia 34 Mk Ii
29.6
Columbia 34 Mk Ii Sd
Islander 34
27.1
Viking 34
22.5
Capsize Screening (lower = safer)
Shelter Island 33 ★
Bristol 33
1.76
Columbia 34 Mk Ii
1.75
Columbia 34 Mk Ii Sd
Islander 34
1.84
Viking 34
1.90
Displacement / Length (lower = lighter)
Shelter Island 33 ★
291
Bristol 33
322
Columbia 34 Mk Ii
Columbia 34 Mk Ii Sd
264
Islander 34
297
Viking 34
Hull Speed
Shelter Island 33 ★
Bristol 33
6.8 kts
Columbia 34 Mk Ii
7.0 kts
Columbia 34 Mk Ii Sd
Islander 34
6.7 kts
Viking 34
7.0 kts
Speed Number (higher = faster)
Shelter Island 33 ★
Bristol 33
1.4
Columbia 34 Mk Ii
2.0
Columbia 34 Mk Ii Sd
Islander 34
1.7
Viking 34
3.1
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