The Islander 27 2 is moderately powered for comfortable coastal cruising, with a quick, snappy motion best suited to day sailing.
Hull Speed
The theoretical displacement-mode speed limit — determined by waterline length, not engine or sail power.
A displacement hull pushes a bow wave whose speed is limited by the waterline length.
With a waterline of 23.0′, the Islander 27 2 tops out around 6.4 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √23.0′ LWL = 6.4 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
SA / Displacement
17.2
Moderate sail power — a capable coastal cruiser, not overpowered.
Comfort Ratio
16.4
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.04
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
685lbs
Weight needed to sink the hull one inch — loading sensitivity.
Motion & Offshore Suitability
Two ratios that matter most when you're planning passages — how the boat feels in a seaway, and whether the hull geometry is suitable for open ocean.
Comfort Ratio
16.4
Quick, snappy motion — better for day sails and racing than long passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
2.04
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Islander 27 2 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Express 27
137s/nm
Hunter 27
213s/nm
Cape Dory 270
219s/nm
Estimated Speed by Wind
Rough boat speed estimates at different true wind speeds and points of sail — derived from hull speed, SA/D, and displacement, not measured polars.
| Point of Sail |
6 kts TWS |
10 kts TWS |
15 kts TWS |
20 kts TWS |
| Close-hauled40–50° |
2.6 |
3.2 |
3.6 |
3.8 |
| Close Reach60° |
3.1 |
3.9 |
4.4 |
4.6 |
| Beam Reach90° |
3.8 |
4.8 |
5.4 |
5.6 |
| Broad Reach120–135° |
3.5 |
4.5 |
5.0 |
5.2 |
| Run150–180° |
2.8 |
3.6 |
4.0 |
4.2 |
These are simplified estimates based on hull speed (6.4 kts),
SA/D (17.2), and empirical efficiency curves — not instrument-measured
polars. Real-world speed varies with sea state, bottom condition, sail trim, and current.
Speeds in gold approach hull speed;
bold gold means near or at hull speed.
Wind Range & Comfort Envelope
Estimated wind ranges for comfortable sailing on the Islander 27 2 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–20 kts
20–28 kts
28+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–28 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
28+ kts
Storm conditions. Storm jib or bare poles. Seek shelter if coastal.
How It Compares
Side-by-side with the boats most often cross-shopped against the Islander 27 2.
|
Islander 27 2 |
Cape Dory 270 |
Cc 27 Mk Ii |
Express 27 |
Hunter 27 |
Hunter 27 3 |
| Dimensions |
| LOA |
27.3 |
27.3 |
27.3 |
27.3 |
27.2 |
27.3 |
| LWL |
23.0 |
20.8 |
21.0 |
23.8 |
22.0 |
23.6 |
| Beam |
8.3 |
9.4 |
9.9 |
8.0 |
9.2 |
9.5 |
| Displacement |
4 |
8 |
5 |
2 |
7 |
7 |
| Ballast |
1 |
3 |
2 |
1 |
3 |
3 |
| Sail Area |
285 |
398 |
373 |
276 |
303 |
340 |
| Performance |
| PHRF |
— |
219 |
— |
137 |
213 |
— |
| SA/Disp |
17.2 |
15.5 |
19.2 |
24.4 |
13.2 |
14.0 |
| Bal/Disp |
— |
38.8 |
45.7 |
44.9 |
42.9 |
44.4 |
| Comfort |
16.4 |
28.8 |
17.5 |
9.6 |
23.7 |
22.5 |
| Capsize |
2.04 |
1.86 |
2.25 |
2.38 |
1.94 |
2.02 |
| Hull Speed |
6.4 |
6.1 |
6.1 |
6.5 |
6.3 |
6.5 |