The Brewer 42 is moderately powered for comfortable coastal cruising, with a steady, comfortable ride offshore.
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 32.7′, the Brewer 42 tops out around 7.7 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √32.7′ LWL = 7.7 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
17.1
Moderate sail power — a capable coastal cruiser, not overpowered.
Ballast / Displacement
36.2%
Typical cruising ballast — balanced stability and motion underway.
Displacement / Length
301
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
33.4
Good offshore comfort — steady enough for multi-day passages.
Capsize Screening
1.82
Below the 2.0 offshore threshold — acceptable for ocean passages.
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
33.4
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
1.82
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 Brewer 42 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Whitby 42
153s/nm
Westsail 42
174s/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° |
3.1 |
3.9 |
4.3 |
4.5 |
| Close Reach60° |
3.7 |
4.7 |
5.2 |
5.4 |
| Beam Reach90° |
4.5 |
5.7 |
6.4 |
6.7 |
| Broad Reach120–135° |
4.2 |
5.3 |
5.9 |
6.2 |
| Run150–180° |
3.4 |
4.2 |
4.7 |
4.9 |
These are simplified estimates based on hull speed (7.7 kts),
SA/D (17.1), 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 Brewer 42 — 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 Brewer 42.
|
Brewer 42 |
Brewer 44 |
Morgan Out Island 41 |
Westsail 42 |
Whitby 42 |
| Dimensions |
| LOA |
42.0 |
44.0 |
41.3 |
42.9 |
42.0 |
| LWL |
32.7 |
33.4 |
34.0 |
33.3 |
32.7 |
| Beam |
13.0 |
13.3 |
13.8 |
13.0 |
13.0 |
| Displacement |
23 |
28 |
27 |
31 |
23 |
| Ballast |
8 |
12 |
9 |
12 |
8 |
| Sail Area |
875 |
— |
670 |
948 |
875 |
| Performance |
| PHRF |
— |
— |
— |
174 |
153 |
| SA/Disp |
17.1 |
— |
12.0 |
15.3 |
17.1 |
| Bal/Disp |
36.2 |
42.1 |
— |
— |
— |
| Comfort |
33.4 |
37.9 |
34.9 |
44.2 |
33.6 |
| Capsize |
1.82 |
1.75 |
1.85 |
1.65 |
1.82 |
| Hull Speed |
7.7 |
7.8 |
7.8 |
7.7 |
7.7 |