The Balaton 31 is well-powered with enough sail area to move in light air, with acceptable motion comfort for coastal passages, 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 24.1′, the Balaton 31 tops out around 6.6 knots in displacement mode — after that, the bow wave outruns the hull and resistance climbs steeply.
1.34 × √24.1′ LWL = 6.6 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
19.8
Powerful cruiser/racer — quick in light air, reef early when it pipes up.
Ballast / Displacement
41.1%
Stiff enough to carry a big genoa comfortably into moderate breeze.
Displacement / Length
256
Moderate-heavy — carries provisions well, deliberate in light air.
Comfort Ratio
23.0
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Capsize Screening
1.94
Below the 2.0 offshore threshold — acceptable for ocean passages.
Pounds/Inch Immersion
836lbs
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
23.0
Acceptable coastal comfort — fine for weekends, notice the chop offshore.
Under 20 — Snappy, racing motion
20–30 — Acceptable coastal
30–40 — Good offshore comfort
Over 40 — Very comfortable offshore
Capsize Screening Formula
1.94
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 Balaton 31 sits on the PHRF handicap spectrum — lower numbers mean faster boats.
Cruiser/Racer 90–150
Cruiser 150–210
Heavy Cruiser 210–300
Balaton 31
180s/nm
Typical cruiser — designed for comfort and ease, not podium finishes.
Hughes 31
191s/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 |
3.6 |
4.0 |
4.2 |
| Close Reach60° |
3.4 |
4.3 |
4.8 |
5.0 |
| Beam Reach90° |
4.2 |
5.3 |
5.9 |
6.2 |
| Broad Reach120–135° |
3.9 |
4.9 |
5.5 |
5.7 |
| Run150–180° |
3.1 |
3.9 |
4.4 |
4.6 |
These are simplified estimates based on hull speed (6.6 kts),
SA/D (19.8), 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 Balaton 31 — based on sail area, ballast, and displacement characteristics.
Ghost
Sweet Spot
Reef
Heavy
0–6 kts
6–20 kts
20–30 kts
30+ kts
Ghosting
0–6 kts
Light air, motor-sailing likely. Need patience and a light genoa.
Sweet Spot
6–20 kts
Comfortable under full sail. Best speed-to-comfort ratio.
Time to Reef
20–30 kts
Time to shorten sail. Reef the main, swap to a working jib.
Heavy Weather
30+ 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 Balaton 31.
|
Balaton 31 |
Bristol 311 |
Hallberg Rassy 312 |
Hughes 31 |
Longbow 31 Westerly |
Seafarer 31 Mkii |
| Dimensions |
| LOA |
31.0 |
31.0 |
30.9 |
31.0 |
31.0 |
31.0 |
| LWL |
24.1 |
24.8 |
25.3 |
24.0 |
25.0 |
25.1 |
| Beam |
9.7 |
10.2 |
10.1 |
9.7 |
9.5 |
9.8 |
| Displacement |
8 |
11 |
10 |
9 |
9 |
10 |
| Ballast |
3 |
4 |
4 |
3 |
4 |
4 |
| Sail Area |
495 |
455 |
484 |
394 |
371 |
— |
| Performance |
| PHRF |
180 |
— |
— |
191 |
— |
— |
| SA/Disp |
19.8 |
14.6 |
15.9 |
14.5 |
13.4 |
— |
| Bal/Disp |
41.1 |
40.2 |
44.9 |
36.8 |
— |
47.1 |
| Comfort |
23.0 |
29.6 |
28.5 |
26.2 |
27.0 |
— |
| Capsize |
1.94 |
1.82 |
1.83 |
1.86 |
1.80 |
— |
| Hull Speed |
6.6 |
6.7 |
6.7 |
6.6 |
6.7 |
— |