Most yacht owners get a master cabin. Buyers of the new Sirena 118 can have something considerably more ridiculous: an owner's suite spread across two decks.
The new 118-foot flagship from Sirena Yachts is preparing for its world premiere at the 2026 Cannes Yachting Festival, where it will become the largest yacht currently offered by the Turkish builder. The first Sirena 118 has already been launched and delivered ahead of the show.
But size isn't really what makes this yacht interesting.
Sirena has taken one of the most valuable areas aboard a yacht and completely rethought it, creating an optional "loft" arrangement that connects the owner's main-deck stateroom to an additional private retreat on the deck below.
There's even a private spiral staircase between them.
A Duplex Apartment on a 118-Foot Yacht
Normally, the owner of a yacht this size gets a large full-beam suite positioned forward on the main deck. That's already some of the best real estate aboard the boat.
The Sirena 118 can take that concept one step further.
In the optional loft configuration, the main-deck owner's stateroom connects directly to a second private space on the lower deck. Instead of simply adding another guest cabin below, that area becomes an extension of the owner's personal accommodation.
The two levels are connected internally by a dedicated spiral staircase, creating something much closer to a duplex apartment than a conventional yacht cabin.
And the lower level isn't buried deep inside the boat.
It is designed as a private waterside retreat with direct access toward the sea.
That means an owner could wake up in the main-deck bedroom, walk downstairs without entering the yacht's public areas and end up in a private space essentially at water level.
Yacht Builders Are Fighting Over the Owner's Cabin
The Sirena 118 is an extreme example of a much bigger change happening in yacht design.
For years, builders competed over saloons, flybridges, beach clubs and the number of guest cabins they could squeeze aboard.
Increasingly, they're competing over the owner's experience.
Private terraces, fold-down balconies, panoramic glazing, direct access to pools and beach clubs, dedicated lounges and enormous bathrooms are appearing on yachts where a large bedroom would once have been enough.
It makes sense when you consider who is actually paying for the boat.
A yacht owner may spend tens of millions of dollars purchasing and operating a vessel. Giving that person essentially the same cabin layout as everyone else, only slightly larger, suddenly feels like a missed opportunity.
The Sirena 118 takes that logic to its conclusion: give the owner another floor.
And This Isn't Even a Giant Superyacht
What makes the layout particularly interesting is the size of the boat.
At 36 meters, or 118 feet, the Sirena 118 is certainly a superyacht, but it isn't remotely close to the enormous 70-, 80- and 100-meter vessels where extravagant multi-level owner apartments have more room to exist.
Sirena has packaged the entire yacht into just 265 gross tons.
That's significant because gross tonnage measures internal volume rather than simply the yacht's length. At 265 GT, designers still have to make difficult decisions about where every major space goes.
Giving two levels to the owner's accommodation therefore isn't just an interior-design gimmick. It's a substantial commitment of some of the yacht's most valuable volume.
The Rest of the Yacht Isn't Exactly Small
Despite that owner-focused layout, Sirena hasn't turned the rest of the yacht into an afterthought.
The 118 stretches across three decks with a beam of 7.9 meters, or nearly 26 feet, and can accommodate up to 12 guests.
The conventional accommodation arrangement places the owner's suite forward on the main deck, with a large VIP and additional guest cabins below.
Outside, the yacht includes multiple entertainment areas across the three decks. There's a Jacuzzi on the foredeck surrounded by sunpads and lounging space, while the upper deck provides another large outdoor area for dining and entertaining.
At the stern, the yacht opens toward the water, continuing the trend of turning what was traditionally a functional aft section into one of the most desirable places aboard.
Huge Windows Are Becoming Almost Mandatory
Look at the Sirena 118 from the side and another modern yacht trend immediately becomes obvious.
Glass is everywhere.
Long horizontal windows stretch across the main and upper decks, while the owner's accommodation is designed around extensive views of the surrounding water.
This is becoming increasingly common as yacht builders try to eliminate the feeling of being inside a hull.
Older yachts often relied on relatively small windows and portholes. New yachts are increasingly designed almost like waterfront homes, with enormous glazing and uninterrupted sightlines connecting interior spaces to the sea.
It's one of the reasons a modern 118-foot yacht can feel dramatically different from a yacht of similar length built 20 years ago.
It's Sirena's Biggest Yacht Yet
The 118 is also important for Sirena itself.
The builder is better known for smaller luxury motor yachts, but the 118 pushes the company decisively into the superyacht market.
It's the largest composite yacht in the Sirena range and the beginning of a new, larger line for the company.
The exterior styling was developed by Sirena's own design team, while legendary naval architect Germán Frers was responsible for the yacht's naval architecture. Dutch studio Cor D. Rover designed the interior.
Construction is entirely in GRP, or fiberglass composite, rather than the steel-and-aluminum construction commonly seen as yachts become significantly larger.
It's Built to Travel, Not Just Sit in Monaco
Underneath the unusual interior is a fast-displacement hull designed for efficient long-distance cruising.
The standard propulsion package uses two MAN V12 diesels producing a combined 3,100 horsepower.
That configuration is designed around comfortable cruising rather than outrageous speed. An optional higher-output package raises combined power to 3,800 horsepower and can push the yacht to a claimed maximum speed of roughly 21 knots.
That might not sound particularly fast compared with the 70- and 80-knot performance boats appearing elsewhere at Cannes, but speed isn't really the point here.
The Sirena 118 is designed around spending extended periods aboard, which helps explain why so much attention has been placed on usable living space.
Why Yacht Interiors Are Getting More Like Houses
The two-story suite also illustrates an interesting shift in what wealthy buyers expect from yachts.
Luxury yachts were once designed primarily as boats with luxurious interiors.
Increasingly, they're being designed like luxury residences that happen to move.
Owners want enormous windows because they're accustomed to them in modern homes. They want separate living areas because they're accustomed to having them on land. They want private terraces, spas, offices, gyms and outdoor lounges rather than simply cabins and a saloon.
Designers are responding by breaking some of the traditional rules about how a yacht's decks should be divided.
A bedroom doesn't necessarily need to exist entirely on one deck anymore.
A beach club doesn't have to be shared with every guest.
And the owner doesn't necessarily have to leave the master suite to reach the water.
The Sirena 118 Is About to Make Its Cannes Debut
The timing makes the yacht particularly interesting.
The first Sirena 118 has already been delivered to its owners after being completed in Turkey, but the model has yet to make its public world premiere.
That happens at the Cannes Yachting Festival, running September 8 through September 13, 2026.
Cannes is one of the biggest stages in the world for new production yachts and smaller superyachts, which means the 118 will arrive alongside a huge number of other premieres competing for buyer attention.
Sirena has given itself one feature that's going to be extremely easy to remember.
It's the yacht with the two-story bedroom.
Final Thoughts
At 118 feet, the new Sirena is already an impressive yacht. But another large fiberglass superyacht isn't particularly shocking anymore.
A private duplex for the owner is.
The optional loft layout shows just how far builders are willing to go to differentiate yachts in an increasingly competitive market, and how dramatically expectations at the upper end of boating have changed.
More horsepower used to be enough. Then buyers wanted bigger beach clubs, larger windows and more toys.
Now apparently they need another floor.
When the Sirena 118 makes its world premiere at Cannes next week, plenty of new yachts will be fighting for attention. Few will have a feature quite as easy to explain as this one.
