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Islander 30 Mk Ii
Designer: Robert Finch  ·  Builder: Islander  ·  First built: 1970
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About the Islander 30 Mk Ii

Built as an evolution of Islander Yachts' popular 30-foot platform, the Mk II represents a refined approach to coastal cruising and club racing. This fiberglass sloop emerged during an era when builders were perfecting the balance between performance and comfort for the growing recreational sailing market. The design emphasizes seaworthiness and ease of handling, making it an attractive choice for couples or small families seeking weekend adventures or extended coastal passages. Its moderate displacement hull form provides a comfortable motion in varied sea conditions while maintaining respectable sailing performance. The cockpit layout prioritizes safety and functionality, with well-positioned winches and controls that allow for efficient sail handling. Below decks, the Mk II offers a practical accommodation plan that maximizes the available space without compromising structural integrity. The boat's reputation centers on its solid construction quality and forgiving sailing characteristics, traits that have made it popular among both newer sailors stepping up from smaller boats and experienced sailors seeking a reliable coastal cruiser. While not designed for extended offshore passages, the Islander 30 Mk II excels in its intended role as a versatile boat capable of spirited day sailing, comfortable weekend cruising, and competitive club racing in protected to semi-protected waters.

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.
$5,000 – $6,000
typical asking price
Median $5,500  ·  2 listings used
All listings
$5,000 – $6,000 2
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) 30.00 ft / 9.14 m
LWL (Waterline Length) 24.58 ft / 7.49 m
Beam 10.00 ft / 3.05 m
Max Draft 5.00 ft / 1.52 m
Displacement 8,600.00 lb / 3,901 kg
Ballast 3,500.00 lb / 1,588 kg
Sail Area (Reported) 446.00 ft² / 41.43 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG w/plywood cored deck
Designer Robert Finch
Builder Islander
First Built 1970
Last Built 1985
Related Sailboats Newport 30 2 · Capri 30 Catalina · Cs 30 · Cal 30 · J/30
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
17.06
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
23.61
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
1.96
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. 6.64
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
2.1
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. 878.27
Rig Dimensions
I (Foretriangle Height) 38.5
J (Foretriangle Base) 12.6
P (Mainsail Luff) 32.5
E (Mainsail Foot) 12.5
SA Fore 242.55
SA Main 203.13
How It Compares

vs. Cal 30, Capri 30 Catalina, Cs 30, J/30, Newport 30 2

This boat Similar boats
Dimensions
LOA
Islander 30 Mk Ii ★
30.0 ft
Cal 30
30.0 ft
Capri 30 Catalina
30.0 ft
Cs 30
30.0 ft
J/30
30.0 ft
Newport 30 2
30.0 ft
LWL
Islander 30 Mk Ii ★
24.6 ft
Cal 30
24.5 ft
Capri 30 Catalina
25.0 ft
Cs 30
25.4 ft
J/30
25.0 ft
Newport 30 2
26.5 ft
Beam
Islander 30 Mk Ii ★
10.0 ft
Cal 30
10.0 ft
Capri 30 Catalina
10.8 ft
Cs 30
10.3 ft
J/30
10.8 ft
Newport 30 2
10.7 ft
Displacement
Islander 30 Mk Ii ★
8 lbs
Cal 30
9 lbs
Capri 30 Catalina
8 lbs
Cs 30
8 lbs
J/30
6 lbs
Newport 30 2
8 lbs
Ballast
Islander 30 Mk Ii ★
3 lbs
Cal 30
3 lbs
Capri 30 Catalina
3 lbs
Cs 30
3 lbs
J/30
2 lbs
Newport 30 2
2 lbs
Sail Area
Islander 30 Mk Ii ★
446 sq ft
Cal 30
420 sq ft
Capri 30 Catalina
387 sq ft
Cs 30
462 sq ft
J/30
436 sq ft
Newport 30 2
414 sq ft
Performance
PHRF Rating (lower = faster)
Islander 30 Mk Ii ★
Cal 30
183 s/nm
Capri 30 Catalina
111 s/nm
Cs 30
150 s/nm
J/30
144 s/nm
Newport 30 2
SA / Displacement (higher = more powerful)
Islander 30 Mk Ii ★
17.1
Cal 30
14.9
Capri 30 Catalina
15.5
Cs 30
18.5
J/30
20.8
Newport 30 2
16.6
Ballast / Disp (higher = stiffer)
Islander 30 Mk Ii ★
Cal 30
Capri 30 Catalina
37.5 %
Cs 30
J/30
39.3 %
Newport 30 2
Comfort Ratio (higher = more comfortable offshore)
Islander 30 Mk Ii ★
23.6
Cal 30
26.4
Capri 30 Catalina
Cs 30
20.8
J/30
23.6
Newport 30 2
19.2
Capsize Screening (lower = safer)
Islander 30 Mk Ii ★
1.96
Cal 30
1.89
Capri 30 Catalina
Cs 30
2.05
J/30
1.73
Newport 30 2
2.14
Displacement / Length (lower = lighter)
Islander 30 Mk Ii ★
Cal 30
Capri 30 Catalina
228
Cs 30
J/30
109
Newport 30 2
Hull Speed
Islander 30 Mk Ii ★
6.6 kts
Cal 30
6.6 kts
Capri 30 Catalina
Cs 30
6.8 kts
J/30
7.6 kts
Newport 30 2
6.9 kts
Speed Number (higher = faster)
Islander 30 Mk Ii ★
2.1
Cal 30
1.6
Capri 30 Catalina
Cs 30
2.7
J/30
Newport 30 2
2.8
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