Catamaran vs Monohull: Which One to Sail?

When cruising, the choice between a catamaran and a monohull often comes down to a matter of priority: comfort and living space on the catamaran side, helm feel and entry budget on the monohull side. For a family cruise in the West Indies or the Seychelles, the catamaran wins in the vast majority of cases. Here are the 6 criteria that make the difference.

What is the fundamental difference between a catamaran and a monohull?

The catamaran is a sailing boat with two parallel hulls joined by a central deck - the nacelle, which houses the saloon and cabins - with a spacious outdoor cockpit. The monohull is a sailing boat with a single hull, stabilized by a submerged ballasted keel. This structural difference drives everything else: behaviour at sea, living space, draft, price.

Two hulls or one: what it really changes

A catamaran does not heel. While sailing, it stays flat or nearly so, which radically changes life on board. A monohull heels under sail - sometimes 20 to 30 degrees in a rough sea - which is a sensation valued by sporty sailors, but a real constraint for cooking, sleeping or moving around. The monohull’s ballasted keel, on the other hand, gives it the ability to self-right after a capsize, a very rare event when cruising but impossible to ignore. The catamaran floats flat but does not right itself on its own if it capsizes.

Catamaran or monohull: which is more comfortable at sea?

The catamaran offers superior comfort when cruising in almost all sea conditions. No heeling, single-level living spaces, a wide cockpit open onto the saloon, cabins separated by hull each with their own bathroom. For a family crew, the difference is immediate from the very first night passage. The monohull offers more intense sailing sensations - a genuine quality for sporty sailors, but a constraint for mixed crews.

The catamaran is not free of motion: it pitches more in a short sea (a fore-and-aft movement at anchor or in a light sea), which can bother some passengers. But while sailing, the absence of heel significantly reduces the frequency of seasickness, which is linked more to rotational movements than to horizontal oscillations. For a family with children preparing a meal during a trade-wind passage, a galley worktop that stays horizontal makes a real difference.

Draft and anchoring: why does the catamaran have a decisive advantage?

Catamarans of 40 to 50 feet draw between 1.20 and 1.38 m of water (the 13.99 m Lagoon 46 has a 1.35 m draft). An equivalent monohull typically draws double that - between 1.80 and 2.20 m depending on the keel. The direct consequence: the catamaran can anchor 30 metres from a beach where the monohull has to stay in deep water or pick up a mooring offshore.

In sailing areas such as the lagoons of the Seychelles, the Grenadines or the atolls of Polynesia, this reduced draft is not a luxury: it is often the very condition for reaching the most beautiful anchorages. A catamaran can reach them with peace of mind where a monohull risks running aground. The catamaran is also more stable at anchor in strong wind: the bridle system on two bows limits the yawing, unlike the monohull which sails around its anchor.

Sailing performance: is the catamaran faster than the monohull?

The catamaran is faster downwind and on a reach, but the monohull points better upwind. When cruising in the trade winds - Caribbean, Seychelles, Polynesia - the wind generally blows from 90 to 180 degrees: that is the catamaran’s favourable point of sail. The cruising speed of a 12 to 14 metre catamaran sits between 7 and 10 knots in a wind of 15 to 20 knots.

This ability to maintain a sustained speed is also a safety argument on the open sea: outrunning a building blow sometimes allows you to avoid difficult conditions. On the other hand, if your program involves sustained upwind sailing - heading north in the Mediterranean, returning against the trade winds - the monohull keeps a real advantage. For racers and offshore solo sailors, handling a monohull remains a standard.

Budget: how much does a catamaran cost compared to a monohull?

A new 40-foot catamaran costs from 450,000 to 480,000 euros excluding tax in 2026. A monohull of the same length sells for 40 to 50 % less. The gap also shows up in marina fees: in most marinas, berths are priced by width and the charges for multihulls are about 50 % higher than for a monohull of identical length. Maintenance is also heavier - two engines to service, two hulls to antifoul, a travel lift suited to wide beams.

On the used market, a 7 to 8 year old Lagoon 42 in a 4-cabin layout sells for between 290,000 and 420,000 euros depending on condition, equipment and sailing area. And catamarans hold their value better: Lagoon and Fountaine-Pajot models keep 75 to 82 % of their initial value at 5 years. For a buyer who is considering reselling in the medium term, or chartering during the off-seasons, this argument sometimes reverses the initial economic calculation.

Catamaran or monohull: which boat for which sailing program?

The answer depends on three parameters: the crew profile, the sailing area and the intended use - occasional rental, purchase, long voyage. For a family cruise in the Caribbean or the Seychelles, the catamaran wins without hesitation. For sporty offshore sailing solo or shorthanded in the North Atlantic, the monohull keeps real advantages.

Sailing program	Catamaran	Monohull
Family cruise (Caribbean, Seychelles, Polynesia)	Recommended	Possible
Lagoons, shoals, coastal anchorages	Strongly recommended (draft)	Not advised
Sporty sailing, racing, offshore solo	Performance option	Recommended
Tight budget, first boat	Less suitable (purchase cost)	More accessible
Long-term living aboard	Recommended	Restrictive
Round-the-world with a family crew	Recommended	Possible (experienced crews)

To discover what a week aboard a catamaran really means in real conditions - anchoring in a lagoon, life as a crew, sailing in the trade winds - Sailoe offers organized crewed cruises in the Seychelles and the West Indies. A way to experience life on a catamaran before any decision to buy or charter long term.

Are you new to sailing a catamaran and want to understand the basics on board before choosing? Find our practical advice in our article sailing a catamaran for the first time.

Frequently asked questions about catamarans and monohulls

What are the advantages of a catamaran over a monohull?

The catamaran offers stability without heel, living space clearly superior at equal length, a reduced draft (1.20 to 1.38 m for 40 to 50 foot models) that opens access to coastal anchorages and lagoons, two engines for better manoeuvrability in port, and a stable platform suited to life on board - cooking, sleeping, family life. The main drawback: a purchase cost 40 to 50 % higher than a monohull and higher marina fees.

What is the difference between a monohull and a catamaran?

The monohull is a sailing boat with a single ballasted hull that heels under sail and rights itself after a capsize thanks to its keel. The catamaran is a multihull with two hulls that does not heel, offers more living space and a reduced draft, but does not right itself on its own if it capsizes - a statistically very rare event in leisure cruising. The use determines the choice: comfort and sunny destinations favour the catamaran, sporty sailing and entry budget favour the monohull.

What are the drawbacks of a catamaran?

The purchase price is 40 to 50 % higher than an equivalent monohull. Marina fees are about 50 % higher in most marinas. Maintenance is heavier - two engines, two hulls to antifoul. Windage (lateral exposure to the wind) makes some port manoeuvres tricky in strong wind. Upwind performance is inferior to the monohull. In the event of a capsize (rare), the catamaran does not right itself on its own. These drawbacks are real, but often offset by the stronger residual value and the charter income potential.

Does a catamaran go faster than a monohull?

Downwind and on a reach - wind on the beam or from behind - the catamaran is generally faster. Cruising models of 12 to 14 metres reach 7 to 10 knots in a wind of 15 to 20 knots. On the other hand, the monohull points better upwind (close-hauled) thanks to its keel and its slender hull. For trade-wind cruises (Caribbean, Seychelles, Polynesia) where the wind carries, the speed advantage clearly goes to the catamaran.