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San Juan 77
Designer: Don Clark  ·  Builder: Clark Boat Co.  ·  First built: 1979
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About the San Juan 77

Bearing the name of one of America's most celebrated sailing regions, the San Juan 77 is a sizeable performance cruiser designed to handle ambitious passages with confidence. Built by San Juan Sailboats, a Pacific Northwest manufacturer that earned a loyal following for producing capable and well-priced vessels, this boat sits at the larger end of the San Juan lineup and reflects the brand's commitment to blending offshore capability with accessible sailing. With a hull designed for both stability and speed, the San Juan 77 suits sailors looking to take on coastal cruising and extended bluewater adventures alike. San Juan Sailboats built a reputation throughout the latter half of the twentieth century for crafting boats that rewarded attentive sailors without demanding expert-level crews, making their designs popular among families and liveaboards as well as serious passage-makers. While detailed specifications for this model are limited, its standing within the San Juan range suggests a roomy, seaworthy design with practical offshore characteristics. Prospective buyers would benefit from a thorough survey and direct comparison with similar bluewater cruisers of the era to fully assess its capabilities and condition.

Market Price Estimate Beta
Small sample size. This estimate is based on fewer than 5 listings and may not be representative of the true market. Use with caution.
$2,000 – $2,000
typical asking price
Median $2,000  ·  1 listing used
All listings
$2,000 – $2,000 1
Rate a listing price
$
About this estimate
  • Prices are based on recent asking prices from public listings — not actual sale prices, which are typically lower.
  • Condition is not factored in. A well-maintained boat with new sails and engine can be worth significantly more than a project boat of the same model.
  • Location affects price. Boats in landlocked states or areas with fewer buyers often sell for less than those on the coast.
  • Year of manufacture is not filtered. Older examples of this model will generally be priced lower than newer ones.
  • Included equipment varies widely. A boat with a full suite of electronics, dodger, and new standing rigging may command a large premium.
  • Outliers are automatically excluded using statistical filtering to improve accuracy, but some bad data may remain.
Core Dimensions
LOA (Length Overall) 25.75 ft / 7.85 m
LWL (Waterline Length) 20.00 ft / 6.10 m
Beam 9.50 ft / 2.90 m
Max Draft 4.00 ft / 1.22 m
Displacement 3,200.00 lb / 1,451 kg
Ballast 1,100.00 lb / 499 kg
Sail Area (Reported) 304.00 ft² / 28.24 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Fractional Sloop
Construction FG
Designer Don Clark
Builder Clark Boat Co.
First Built 1979
Related Sailboats Seafarer 26 · Ericson 26 2 · Oday 26 · Columbia T 26 · Islander 26
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
22.46
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
11.35
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
2.58
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. 5.99
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
3.56
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. 678.89
Rig Dimensions
I (Foretriangle Height) 27.75
J (Foretriangle Base) 9.5
P (Mainsail Luff) 30.0
E (Mainsail Foot) 11.0
SA Fore 131.81
SA Main 165.0
How It Compares

vs. Columbia T 26, Ericson 26 2, Islander 26, Oday 26, Seafarer 26

This boat Similar boats
Dimensions
LOA
San Juan 77 ★
25.8 ft
Columbia T 26
25.8 ft
Ericson 26 2
25.8 ft
Islander 26
25.8 ft
Oday 26
25.7 ft
Seafarer 26
25.8 ft
LWL
San Juan 77 ★
20.0 ft
Columbia T 26
22.8 ft
Ericson 26 2
21.9 ft
Islander 26
21.7 ft
Oday 26
21.6 ft
Seafarer 26
22.8 ft
Beam
San Juan 77 ★
9.5 ft
Columbia T 26
8.0 ft
Ericson 26 2
9.3 ft
Islander 26
10.0 ft
Oday 26
8.0 ft
Seafarer 26
8.3 ft
Displacement
San Juan 77 ★
3 lbs
Columbia T 26
4 lbs
Ericson 26 2
5 lbs
Islander 26
4 lbs
Oday 26
4 lbs
Seafarer 26
4 lbs
Ballast
San Juan 77 ★
1 lbs
Columbia T 26
1 lbs
Ericson 26 2
2 lbs
Islander 26
2 lbs
Oday 26
1 lbs
Seafarer 26
1 lbs
Sail Area
San Juan 77 ★
304 sq ft
Columbia T 26
270 sq ft
Ericson 26 2
326 sq ft
Islander 26
302 sq ft
Oday 26
Seafarer 26
270 sq ft
Performance
PHRF Rating (lower = faster)
San Juan 77 ★
Columbia T 26
Ericson 26 2
234 s/nm
Islander 26
233 s/nm
Oday 26
237 s/nm
Seafarer 26
237 s/nm
SA / Displacement (higher = more powerful)
San Juan 77 ★
22.5
Columbia T 26
16.1
Ericson 26 2
17.3
Islander 26
17.1
Oday 26
Seafarer 26
15.7
Ballast / Disp (higher = stiffer)
San Juan 77 ★
Columbia T 26
31.8 %
Ericson 26 2
42.9 %
Islander 26
Oday 26
38.5 %
Seafarer 26
38.6 %
Comfort Ratio (higher = more comfortable offshore)
San Juan 77 ★
11.4
Columbia T 26
18.1
Ericson 26 2
18.2
Islander 26
15.0
Oday 26
Seafarer 26
18.1
Capsize Screening (lower = safer)
San Juan 77 ★
2.58
Columbia T 26
1.95
Ericson 26 2
2.13
Islander 26
2.38
Oday 26
Seafarer 26
1.99
Displacement / Length (lower = lighter)
San Juan 77 ★
Columbia T 26
165
Ericson 26 2
222
Islander 26
Oday 26
213
Seafarer 26
174
Hull Speed
San Juan 77 ★
6.0 kts
Columbia T 26
6.4 kts
Ericson 26 2
6.3 kts
Islander 26
6.2 kts
Oday 26
Seafarer 26
6.4 kts
Speed Number (higher = faster)
San Juan 77 ★
3.6
Columbia T 26
3.0
Ericson 26 2
2.5
Islander 26
2.6
Oday 26
Seafarer 26
2.8
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