The Sonoma 30 is aggressively canvassed for its weight, with a quick, snappy motion best suited to day sailing, and respectable in club 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 26.9′, the Sonoma 30 tops out around 7.0 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √26.9′ LWL = 7.0 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
99s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
SA / Displacement
24.7
Performance-oriented — carries a lot of canvas for its weight.
Comfort Ratio
11.5
Quick, snappy motion — better for day sails and racing than long passages.
Capsize Screening
2.27
Above the 2.0 offshore threshold — best suited for coastal and protected waters.
Pounds/Inch Immersion
846lbs
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
11.5
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
2.27
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 Sonoma 30 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Racer 0–90
Cruiser/Racer 90–150
Cruiser 150–210
Sonoma 30
99s/nm
Cruiser/racer — competitive in club racing, comfortable cruising.
Wavelength 30
120s/nm
Olson 911 S
126s/nm
Stellar 30
156s/nm
Ericson 30
168s/nm
Santana 30 30Gp
171s/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° |
3.3 |
4.1 |
4.6 |
4.8 |
| Close Reach60° |
4.0 |
5.0 |
5.6 |
5.8 |
| Beam Reach90° |
4.9 |
6.1 |
6.9 |
7.0 |
| Broad Reach120–135° |
4.5 |
5.7 |
6.3 |
6.6 |
| Run150–180° |
3.6 |
4.5 |
5.1 |
5.3 |
These are simplified estimates based on hull speed (7.0 kts),
SA/D (24.7), 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 Sonoma 30 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–5 kts
5–16 kts
16–24 kts
24+ kts
Ghosting
0–5 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
5–16 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
16–24 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
24+ 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 Sonoma 30.
|
Sonoma 30 |
Ericson 30 |
Olson 911 S |
Santana 30 30Gp |
Stellar 30 |
Wavelength 30 |
| Dimensions |
| LOA |
29.9 |
29.9 |
29.9 |
29.9 |
29.9 |
30.0 |
| LWL |
26.9 |
25.3 |
25.0 |
25.4 |
26.3 |
26.8 |
| Beam |
8.8 |
10.5 |
10.3 |
10.3 |
10.0 |
10.0 |
| Displacement |
3 |
9 |
7 |
6 |
5 |
7 |
| Ballast |
1 |
4 |
3 |
2 |
2 |
3 |
| Sail Area |
371 |
470 |
475 |
340 |
398 |
— |
| Performance |
| PHRF |
99 |
168 |
126 |
171 |
156 |
120 |
| SA/Disp |
24.7 |
17.4 |
20.5 |
16.5 |
19.8 |
— |
| Bal/Disp |
— |
44.4 |
44.4 |
— |
34.5 |
44.3 |
| Comfort |
11.5 |
22.7 |
18.7 |
15.6 |
15.3 |
— |
| Capsize |
2.27 |
2.02 |
2.14 |
2.26 |
2.23 |
— |
| Hull Speed |
7.0 |
6.7 |
6.7 |
6.8 |
6.9 |
— |