1. The “ticket” cost: the cabin illusion

When you look at charter prices for a week in August, the first number hits you like a wave: a 46-foot monohull, around 14 meters, like the Oceanis 46.1, typically costs between €4,500 and €5,500.

A catamaran with the same number of cabins, like the Lagoon 42, usually ranges between €9,000 and €11,000.

In other words, you’re paying double to sleep in a cabin that is, technically, almost the same size.

So where does the extra money go? Into the saloon, the cockpit, and all the shared living areas, which on a monohull you only get by going significantly bigger.

Here are the numbers comparing two charter market benchmarks: Oceanis 46.1 and Lagoon 42.

2. The space tax and marina logistics

In the Mediterranean, space is a luxury. Mooring a catamaran in Sardinia or Croatia during high season often means accepting a real multiplier cost: in most marinas, you’ll pay +50% to +100% compared to a monohull.

The reason is simple: a 42-foot catamaran is about 7.70 meters wide, while a 46-foot monohull is around 4.50 meters. From a marina operator’s perspective, you’re taking up the space of two boats.

And while a monohull might squeeze into the last available berth, a catamaran may need to stay at anchor. That said, thanks to its larger volumes, it often offers greater autonomy and a more comfortable onboard life.

3. The speed paradox: from PlayStation to Hobie Cat

Many people choose a catamaran expecting to fly over the water like PlayStation, the legendary multihull sailed by Steve Fossett. And if you’ve ever tried a Hobie Cat on the beach, you know exactly what that feels like: ultra-thin hulls and adrenaline-pumping speed.

But here’s the physics behind it. Ocean and beach catamarans are incredibly fast because they have very narrow hulls and are extremely lightweight. Without the heavy ballast keel that monohulls need to stay upright, they use their width to carry much more sail area.

In other words, they rely on form stability rather than weight stability. It’s like having an engine with far more horsepower: being wider and lighter at the same length, they can carry a much larger sail plan and convert even light wind into pure forward motion instead of heel.

To fit all of this, designers have to make the hulls wider. Modern designs try to optimise this, but the reality remains: much of the extra sail power is used to overcome weight and drag.

The result? In light wind, a monohull often glides more easily, with less surface in contact with the water, while the floating “penthouse” struggles more to break free from its own wake.

4. Hydrodynamics, manoeuvring, and fuel consumption

Physics is unforgiving: moving 12 tons of fibreglass that are 8 meters wide takes energy.

A monohull has a single point of resistance and propulsion: one hull, one engine. It’s agile and efficient at sea, but if you’re not confident with harbour manoeuvres, you may feel the need for a bow thruster when handling tight spaces or crosswinds.

A catamaran, on the other hand, behaves more like a small tank: thanks to its two engines set far apart, it can rotate almost on the spot by reversing thrust on one side.

Source mentioned in the text: Yanmar / Volvo Penta technical data for charter engines.

5. Comfort vs sailing: sensitivity and autonomy

This is where you truly decide what kind of holiday you want.