J Boats J/45

BoatsJ Boats J/45

See her sail

The J Boats J/45, on the water

The fleet's own footage — the truest look at how she really moves.

Footage from Practical Sailor

Is it for you?

Character

Where this design lands on the numbers a shopper trusts — read straight from her own ratios.

LivelySea-kindly

Her light displacement on a moderate beam gives 25 — a moderate, middle-of-the-road motion.

Comfort ratio 25

CoastalBluewater

1.97 — just under the 2.0 offshore line; her beam is modest for her weight.

Capsize screening 1.97

LightHeavy

146 — light for her waterline, so she is easily driven and quick to accelerate.

Displacement / length 146

EasygoingPowered-up

22.9 — a lot of sail for her weight; powered-up and eager, a real performer.

Sail area / displacement 22.9

TenderStiff

40% of her weight is ballast — moderately stiff, a middle-of-the-road stability.

Ballast 40%

Light and lively — happiest day-sailing and coastal-hopping in settled weather.

Draws more than ~87% of boats her size on file
Beamier than ~79% of boats her size on file

Compared with 2281 boats of the same type within a quarter of her length.

What the fleet has seen

The J Boats J/45, as the fleet has seen it

Derived from the videos the fleet has analysed of this model. ▶ marks open the moment aboard.

The J Boats J/45, designed by Alan Johnstone and built by J Boats and J Composites since 2021, is a 13.9 m fractional sloop with a fin w/bulb and spade rudder hull, displacing 10387 kg. It targets sailors seeking high-performance sailing characteristics combined with the interior volume and comfort of production cruisers. The 45-foot vessel features a single-rudder configuration and a deep, high-aspect blade for control at high heel angles and maneuverability.4:11 Performance-oriented deck hardware includes end-boom sheeting with a cockpit-floor traveler, an inner forestay for a secondary headsail, and low-friction rings for jib trimming.4:05 A 2024 cruising edition offers a 1.83 m draft lead keel and a carbon spar package with a 19.66 m air draft, optimized for the Intracoastal Waterway.2:52 The hull design places the water tank in the bow to balance weight.4:39 The interior joinery prioritizes weight savings, offering a spacious owner’s cabin, a large galley, and a dedicated navigation station.6:57

The living fleet

Sailed by the fleet

Where the fleet has filmed this boat.

Seen once across one channel of the fleet.

Basemap © Wikimedia Commons · CC BY-SA 4.0

What they go for

Market signal

Where the fleet has seen this model for sale, and the asking prices that came with it.

$700,000Median asking

From the fleet's own footage — our observed signal, not broker listings.

The record

Full specifications

The complete reference set — tap any figure to switch between metric and imperial.

Dimensions

Weights

Ballast / displacement

40.0%

Rig & sail area

Rig

Fractional Sloop

Ratios

SA / displacement

22.9

Displacement / length

146.2

Comfort ratio

24.9

Capsize screening

1.97

Hull speed

8.6 kn

Pounds / inch immersion

2054

Hull

Hull type

Fin w/bulb & spade rudder

Construction

FG w/ infused sandwich composite

Ballast type

Cast iron keel with lead bulb

Production

Years built

First built 2021

Designer

Alan Johnstone

Builder

J Boats

Boats like this, on the water

More boats like her, on the water

Comparable boats the fleet has on camera: same type, within a quarter of her length. Open the boat, or watch the video — a timestamp means she only appears in passing.

Dufour Yachts 4413.91 mSame hull familyNear-identical lengthA 2024 Felci-designed fractional sloop balancing a high sail-area-to-displacement ratio with a spacious Ardizio interior

Dufour 44 - SI&NO, the boat and the competition from SVN solovelanet

Swan 4513.83 mSame hull familyNear-identical lengthA German Frers-designed fractional sloop built for performance, featuring a high sail-area-to-displacement ratio.

Unlocking the Secrets of Sails : An Exclusive Online Class with North Sails | The Art of Sails19:59 from American Sailing

Lm 4613.92 mSame hull familyNear-identical lengthA high-performance fractional sloop by Kevin Dibley featuring a modern fin-and-bulb configuration and a powerful sail plan

This Dream Takes WORK - Interior Decisions on Our Catamaran Build (MJ Sailing - Ep 303)8:06 from MJ Sailing

Dufour Yachts 455 Grand Large13.76 mSame hull familyNear-identical lengthA 13.76-meter fractional sloop with a 2.01-meter draft, designed for high-volume cruising comfort

Greek Myths & Real Sailor Stories (Sailing La Vagabonde) Ep. 1178:17 from Sailing La Vagabonde

Xp 4413.88 mSame hull familyNear-identical lengthA 13.88-metre performance cruiser featuring a deep 2.3-metre bulb keel and a high 23.91 sail-area-to-displacement ratio

Freshwater Captain from now on🫣 - XTrip Sailing Ep.22718:42 from XTRIP SAILING

Beneteau Oceanis 4513.84 mSame hull familyNear-identical lengthA high-performance fractional sloop from Finot-Conq designed for efficient cruising with a generous sail area

I Have a USB Cigarette Lighter but When I Plug in My Phone the Socket Will Not Work?0:06 from Pacific Yacht Systems

The family

Related models

The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.

J J/40A 2024 Alan Johnstone fractional sloop featuring a high-performance fin keel and spade rudder configuration J Boats Tillotson Pearson J/145A 14.66-metre fractional sloop with a high 26.26 sail area-to-displacement ratio, built for rapid offshore passage-making J-Boats J/95A versatile keel-centerboarder with dual rudders, engineered for performance in both deep and shoal waters J Boats J/9A 2021-launched daysailer with a 24.13 sail-area-to-displacement ratio, built for rapid, responsive performance J Boats Tillotson Pearson J/46A masthead sloop designed for offshore cruising, featuring a 1.89m draft and a balanced 10,886kg displacement

Keep asking

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