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Oday 34
Designer: C. Raymond Hunt Assoc./J. Deknatel  ·  Builder: O'day Corp.  ·  First built: 1980
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About the Oday 34

O'Day's 34-footer represents a significant step up in their production sailboat lineup, designed during the brand's heyday when they were building practical, affordable cruising boats for the growing recreational sailing market. This mid-sized cruiser embodies the classic O'Day philosophy of creating accessible sailing experiences without compromising essential performance characteristics. Built with coastal cruising and weekend adventures in mind, the O'Day 34 offers a comfortable balance between sailing capability and onboard livability. The design reflects the era's emphasis on moderate proportions and forgiving sailing characteristics, making it an appealing choice for sailors transitioning from smaller boats or those seeking reliable performance without extreme demands. The boat's reputation centers on its solid construction and straightforward systems, hallmarks of O'Day's approach to boatbuilding. While not designed for serious offshore work or competitive racing, the 34 handles coastal waters confidently and provides the interior volume necessary for extended cruising with family or friends. The design represents practical sailing at its core, offering dependable performance and the kind of no-nonsense character that made O'Day a respected name among recreational sailors seeking value and reliability.

Market Price Estimate Beta
$4,900 – $40,000
typical asking price
Median $21,200  ·  12 listings used
All listings
$4,900 – $40,000 12
Rate a listing price
$
About this estimate
  • Prices are based on recent asking prices from public listings — not actual sale prices, which are typically lower.
  • Condition is not factored in. A well-maintained boat with new sails and engine can be worth significantly more than a project boat of the same model.
  • Location affects price. Boats in landlocked states or areas with fewer buyers often sell for less than those on the coast.
  • Year of manufacture is not filtered. Older examples of this model will generally be priced lower than newer ones.
  • Included equipment varies widely. A boat with a full suite of electronics, dodger, and new standing rigging may command a large premium.
  • Outliers are automatically excluded using statistical filtering to improve accuracy, but some bad data may remain.
Core Dimensions
LOA (Length Overall) 34.00 ft / 10.36 m
LWL (Waterline Length) 28.75 ft / 8.76 m
Beam 11.25 ft / 3.43 m
Max Draft 5.58 ft / 1.70 m
Displacement 11,500.00 lb / 5,216 kg
Ballast 4,600.00 lb / 2,087 kg
Sail Area (Reported) 524.00 ft² / 48.68 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer C. Raymond Hunt Assoc./J. Deknatel
Builder O'Day Corp.
First Built 1980
Last Built 1984
Owner Reviews

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
153
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
16.51
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
23.33
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
2
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.18
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
2.47
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1.0
Rig Dimensions
I (Foretriangle Height) 43.0
J (Foretriangle Base) 14.0
P (Mainsail Luff) 38.0
E (Mainsail Foot) 11.75
SA Fore 301.0
SA Main 223.25
How It Compares

vs. Aloha 34, Irwin 34 Ton, Seidelmann 34

This boat Similar boats
Dimensions
LOA
Oday 34 ★
34.0 ft
Aloha 34
34.0 ft
Irwin 34 Ton
34.0 ft
Seidelmann 34
34.0 ft
LWL
Oday 34 ★
28.8 ft
Aloha 34
28.7 ft
Irwin 34 Ton
28.3 ft
Seidelmann 34
26.5 ft
Beam
Oday 34 ★
11.3 ft
Aloha 34
11.2 ft
Irwin 34 Ton
9.5 ft
Seidelmann 34
11.8 ft
Displacement
Oday 34 ★
11 lbs
Aloha 34
13 lbs
Irwin 34 Ton
9 lbs
Seidelmann 34
11 lbs
Ballast
Oday 34 ★
4 lbs
Aloha 34
4 lbs
Irwin 34 Ton
4 lbs
Seidelmann 34
5 lbs
Sail Area
Oday 34 ★
524 sq ft
Aloha 34
531 sq ft
Irwin 34 Ton
529 sq ft
Seidelmann 34
517 sq ft
Performance
PHRF Rating (lower = faster)
Oday 34 ★
153 s/nm
Aloha 34
Irwin 34 Ton
159 s/nm
Seidelmann 34
158 s/nm
SA / Displacement (higher = more powerful)
Oday 34 ★
16.5
Aloha 34
15.0
Irwin 34 Ton
18.7
Seidelmann 34
16.8
Ballast / Disp (higher = stiffer)
Oday 34 ★
Aloha 34
34.6 %
Irwin 34 Ton
46.3 %
Seidelmann 34
Comfort Ratio (higher = more comfortable offshore)
Oday 34 ★
23.3
Aloha 34
27.9
Irwin 34 Ton
25.0
Seidelmann 34
22.0
Capsize Screening (lower = safer)
Oday 34 ★
2.00
Aloha 34
1.88
Irwin 34 Ton
1.78
Seidelmann 34
2.13
Displacement / Length (lower = lighter)
Oday 34 ★
Aloha 34
257
Irwin 34 Ton
192
Seidelmann 34
Hull Speed
Oday 34 ★
7.2 kts
Aloha 34
7.2 kts
Irwin 34 Ton
7.1 kts
Seidelmann 34
6.9 kts
Speed Number (higher = faster)
Oday 34 ★
2.5
Aloha 34
1.9
Irwin 34 Ton
3.0
Seidelmann 34
2.0
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