The Island Packet 35 is moderately powered for comfortable coastal cruising, with a steady, comfortable ride offshore, designed for cruising comfort rather than racing.
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 30.0′, the Island Packet 35 tops out around 7.3 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √30.0′ LWL = 7.3 kts
Performance Ratios
Racing handicap, sail-carrying power, stability and comfort — and what each one actually tells you about a day on the water.
PHRF Rating
180s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
SA / Displacement
15.3
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
45.7%
Race-oriented ballast ratio — very stiff and powerful.
Displacement / Length
289
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
31.3
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.85
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
1lbs
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
31.3
Good offshore comfort — steady enough for multi-day passages.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.85
Below the 2.0 offshore threshold — acceptable for ocean passages.
Under 2.0 — Acceptable for offshore
Over 2.0 — Coastal / protected waters
PHRF Fleet Position
Where the Island Packet 35 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Thomas 35
72s/nm
Tartan 3500
117s/nm
Freedom 35 Pedrick
135s/nm
Island Packet 35
180s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Endeavour 35
192s/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° |
2.8 |
3.5 |
3.9 |
4.1 |
| Close Reach60° |
3.4 |
4.2 |
4.7 |
4.9 |
| Beam Reach90° |
4.1 |
5.2 |
5.8 |
6.1 |
| Broad Reach120–135° |
3.8 |
4.8 |
5.4 |
5.6 |
| Run150–180° |
3.0 |
3.8 |
4.3 |
4.5 |
These are simplified estimates based on hull speed (7.3 kts),
SA/D (15.3), 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 Island Packet 35 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–7 kts
7–22 kts
22–32 kts
32+ kts
Ghosting
0–7 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
7–22 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
22–32 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
32+ 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 Island Packet 35.
|
Island Packet 35 |
Endeavour 35 |
Freedom 35 Pedrick |
Rustler 36 |
Tartan 3500 |
Thomas 35 |
| Dimensions |
| LOA |
35.3 |
35.4 |
35.4 |
35.3 |
35.2 |
35.4 |
| LWL |
30.0 |
29.5 |
29.9 |
26.9 |
30.0 |
30.5 |
| Beam |
12.0 |
12.2 |
12.0 |
11.0 |
11.8 |
11.5 |
| Displacement |
17 |
13 |
14 |
16 |
11 |
9 |
| Ballast |
8 |
5 |
4 |
7 |
4 |
4 |
| Sail Area |
640 |
678 |
609 |
693 |
618 |
702 |
| Performance |
| PHRF |
180 |
192 |
135 |
— |
117 |
72 |
| SA/Disp |
15.3 |
19.4 |
16.4 |
17.0 |
19.6 |
24.6 |
| Bal/Disp |
45.7 |
42.5 |
30.6 |
45.3 |
39.5 |
45.4 |
| Comfort |
31.3 |
23.5 |
26.2 |
36.2 |
21.0 |
18.3 |
| Capsize |
1.85 |
2.06 |
1.97 |
1.72 |
2.09 |
2.15 |
| Hull Speed |
7.3 |
7.3 |
7.3 |
7.0 |
7.3 |
7.4 |