What Size Catamaran for Italy? Berth Fees by Length and the 40-42ft Sweet Spot

Deciding what size catamaran to charter in Italy is less about how many people fit and more about a few thresholds in the marina price list. Length drives the berth fee, beam drives it again because a cat is wide, and Italy’s small historic harbours punish both. Get the size wrong and you can spend more on overnight berths in a week than you saved choosing a slightly cheaper boat.

For most crews the answer lands on a 40 to 42-foot cat, and there are concrete, Italy-specific reasons why. But there are also good cases for sizing up, and a couple for sizing down. This guide walks through the berth-fee math, the beam problem nobody warns you about, and how to match boat length to your actual crew without overpaying every night.

What size catamaran to charter is really a berth-fee question

Italian marinas charge by overall length, and the price does not climb smoothly, it jumps at thresholds. The big ones are 12 metres, roughly 40 feet, and 15 metres, about 49 feet. Slip under 12m and you sit in the cheaper bracket; cross it and the nightly rate steps up noticeably. Cross 15m and you are into the bracket where the smartest marinas in Sardinia and the Amalfi Coast really start to bite, often €200 to €400 a night in high season, and sometimes more in the Costa Smeralda showcases like Porto Cervo.

The reason this matters more for a catamaran than a monohull is beam. A 42-foot cat is around 7 metres wide, near double the beam of a monohull of the same length. Many marinas apply a multiplier or a wide-berth surcharge for multihulls, sometimes 1.5 to 2 times the standard rate, because your boat occupies what would otherwise be two slips. So a cat’s berth bill is driven by length and width together, and a small step up in length can drag the beam, and the surcharge, up with it.

The thresholds in plain numbers

As a rough seasonal guide for a catamaran in a mid-range Italian marina: under 40 feet you might pay €80 to €150 a night; a 40 to 45-foot cat, €120 to €250; a 46 to 50-footer, €200 to €350; and a 50-foot-plus cat, €300 upward, far more in the marquee ports. Over a seven-night week where you berth even four nights, the gap between a 42-footer and a 50-footer can be several hundred euros, money that buys a lot of dinners ashore.

The case for the 40 to 42-foot sweet spot

This is where most charter crews should start, and here is why it wins in Italy specifically.

First, it usually keeps you on the right side of the 12-metre berth threshold, or only just over it, holding down the single biggest variable cost of the trip. Second, the beam stays manageable enough that more marinas can take you without the worst wide-berth penalties, and you can squeeze into tighter historic harbours, Amalfi, Lipari, the Aeolian ports, where bigger cats are simply turned away. Third, a 40 to 42-foot cat in the typical four-cabin layout sleeps eight comfortably and handles easily with a small crew, so you are not paying for a professional crew you do not need.

The practical effect is freedom. A boat this size can med-moor into small ports, anchor in coves where a wide 50-footer worries about swinging room, and keep your nightly costs predictable. For how this size choice fits the broader question of matching a boat to your trip, see our guide on how to choose the right catamaran for your trip.

Who it suits

Two couples, or a family of four to six, fit a 40 to 42-foot cat well, with cabins to spare for gear. It is the default recommendation for first-time charterers and for anyone wanting to keep the budget honest while still enjoying the space and stability that make a catamaran worth chartering in the first place.

When to size up anyway

Bigger is sometimes the right answer. If you have eight or more guests who all want a proper double cabin rather than bunking in saloon-converts, a 45 to 48-foot cat earns its higher berth fees in comfort and sanity. The same goes for crews who plan to anchor out almost every night, the larger boat’s extra water and battery capacity, bigger fridges and more shade make long stretches at anchor far more pleasant, and if you rarely enter a marina, the berth-fee penalty barely applies.

Multi-generational trips, where grandparents want a fixed cabin near the heads and teenagers want their own corner, also push toward the larger end. And if your route is mostly open, well-served water, the Costa Smeralda, the wider Tyrrhenian, rather than tiny historic ports, the size limits that constrain smaller harbours stop mattering. Our overview of the best catamarans for cruising covers the models that scale up comfortably.

When to size down

A sub-40-foot cat makes sense for a smaller group, one couple, or two who want to keep both the charter price and the berth bill as low as possible. The lighter boat is cheaper to fuel and slips into anchorages and small harbours with ease. The trade-off is space: water and power capacity are tighter, so you provision and manage resources more carefully, and a long week of anchoring out asks more of you. For four people on a budget who do not need eight berths, though, it can be the shrewd choice.

Matching catamaran size to crew, then checking the numbers

Work it the practical way. Count the people who genuinely need a private cabin, not the brochure’s maximum sleeps. Decide roughly how many nights you will berth versus anchor, because that determines how much the length thresholds will actually cost you. Then look at boats one size each side of your instinct and price a realistic week of berths into each. More often than not the 40 to 42-foot cat comes out ahead on total cost without feeling cramped. To put real euros on the rest of the trip, our breakdown of how much it costs to rent a catamaran in Italy covers the charter fee, fuel, the end clean and the extras that round out the budget.

Frequently Asked Questions

What size catamaran is best for chartering in Italy?

For most crews, a 40 to 42-foot catamaran is the sweet spot. It usually sits at or just above the 12-metre berth-fee threshold, has a beam that more marinas can accept, fits tight historic harbours, and sleeps eight comfortably. Size up only if you have eight-plus guests wanting private cabins or plan to anchor out almost every night.

Why are catamaran berth fees higher than for monohulls?

A catamaran is roughly twice as wide as a monohull of the same length, so it occupies what would otherwise be two slips. Many Italian marinas charge multihulls a wide-berth surcharge of around 1.5 to 2 times the standard rate, on top of the length-based price. Beam, not just length, drives the bill.

At what lengths do Italian berth fees jump?

The key thresholds are 12 metres, about 40 feet, and 15 metres, about 49 feet. Crossing each one steps the nightly rate up a bracket. Staying at or just under 12m keeps you in the cheaper band, which is a major reason the 40 to 42-foot range is popular.

How much should I budget for berths in a week?

It depends on length, beam and how many nights you berth versus anchor. A 40 to 45-foot cat typically runs €120 to €250 a night in season, with marquee ports like Porto Cervo far higher. Anchoring out most nights cuts this dramatically, which is part of a catamaran’s appeal.

Can a big catamaran enter Italy’s historic harbours?

Often not. Small ports along the Amalfi Coast and in the Aeolian Islands have limited width and depth, and wide cats above roughly 45 feet may be refused or surcharged heavily. If your route favours these intimate harbours, a 40 to 42-foot cat gives you far more options.

Sized up your ideal boat? Compare available catamarans and dates on our Italy catamaran charter destinations page and find the right length for your crew.