Sirena 42M Review (2026 Edition) by Aquaholic

The main deck aft has a pool set across the stern, fold-down balconies on either side and a lovely seating area facing out over the water. There's a bar here too, while the huge glass doors slide right back against the saloon walls. Open everything up and it's a very substantial space, with the pool and seating all part of the same area.

But Sirena has done something rather unusual at the other end of the yacht. The owner's cabin opens straight into an outdoor courtyard, tucked into the bow behind a pair of powered glass doors. It's a wonderful little space, with a built-in seat, room for a planted centrepiece and the sort of sheltered, Mediterranean feel you might associate with a villa. The doors glide apart at the push of a button, so the owner can step straight outside without venturing onto the public decks.

It's surprisingly private, too. Even with another superyacht moored alongside in Monaco, the inward curve of the bow leaves an open view ahead. And while there's no shortage of places to sit outside on a 42m (138ft) yacht, there's something rather nice about having an outdoor room entirely to yourself. A quiet morning with a coffee, perhaps, or somewhere to escape to when the party is in full swing aft. It's a brilliant arrangement.

A staircase curves up from here onto the upper foredeck, where there's another area that can be reserved for the owner. This is also a working part of the yacht, however, with the rescue tender stationed forward and access to the anchor-handling equipment. The crew need to get up here when required, so it isn't quite the same private retreat as the patio below.

Further aft, the bridge deck has another large outdoor lounge, complete with a bar, fridge and ice maker. The glass balustrades are particularly nice, thick enough to feel substantial without spoiling the views over the stern. There's plenty of freedom with the furniture layout, as you'd expect on a custom yacht.

And there's still another deck above. The sun deck has a substantial hardtop, a huge area for outdoor dining, another bar and a daybed right at the forward end. Sirena will fit a hot tub up here if the owner wants one. The yacht on the tour didn't have one, but it certainly didn't lack space. With glass balustrades around the outside and the height of three decks beneath you, the views across Monaco were pretty spectacular.

The interior of the Sirena 42M, designed by Hot Lab, is quite restrained, particularly for a yacht of this size. There's a subtle wave pattern worked into the woodwork, with contrasting light and dark finishes and stone-effect panels. YachtBuyer also covered the first official interior photographs after the yacht's Monaco debut.The headlining is particularly nice, with perforated sections in different colours, concealed lighting and a panel that drops down to reveal the television. Even the little speakers are worth mentioning. They're remarkably small for the amount of sound they produce.

The main saloon has almost floor-to-ceiling windows, and the glass doors aft slide right out towards the sides of the superstructure, opening the room to the pool and seating outside. It's a lovely arrangement, and the fairly understated decor suits it rather well. There's a lot of detail in the joinery, but nothing particularly loud or fussy.

Forward of the saloon is a pantry and access to the galley, which has an almost domestic feel despite the scale of the yacht. The serious extraction equipment gives the game away, though. This is a proper working kitchen, with a food lift that runs from the main deck right up to the sun deck, via the upper deck. There's also a large dry store that can be specified as a refrigerated room, plus a separate crew route that connects with the service areas above. With guests spread across three decks, that's pretty handy.

Up on the bridge deck, the sky lounge is another substantial room, with more of that lovely woodwork, illuminated alcoves and some rather smart lighting. There's a mixture of darker timber and pale finishes, with the wave motif appearing again in the detailing.

Owner's Cabin

The owner's suite takes up the forward section of the main deck, and it's a huge amount of accommodation for one cabin. A door beside the main guest staircase marks the entrance to the private area, which begins with a dressing space, a desk or vanity table and some enormous wardrobes. Beyond that is the bedroom itself, with a great deal of floor space around the bed and those big windows out to either side.

The bathroom is equally generous, with a huge walk-in shower, separate toilet and some rather clever detailing. The rainfall shower is almost invisible, with its outlets worked into the ceiling as a pattern of slightly larger holes. It's the sort of detail that could easily go unnoticed, but there's clearly been a lot of thought put into it. A sliding partition closes the bathroom off from the bedroom when required.

And, of course, there's that extraordinary private courtyard beyond the bedroom. The fact that the owner can step straight outside, then take a private staircase up to the foredeck without passing through the guest areas, makes this quite an unusual suite. It's a lot of space to devote to one cabin, but on a yacht with five guest cabins and three substantial outdoor decks, Sirena has clearly given the owner a very generous share.

Guest Accommodation

Four guest cabins occupy the lower deck, with two smaller doubles forward and a pair of larger VIP cabins further aft. The two forward cabins have a lovely, understated finish, with dark wood panels set against lighter surfaces, stone-effect detailing and televisions hidden behind the mirrors. Even the wardrobe handles have had some attention, with rather funky shapes that are a welcome change from the usual straight metal bars. Both cabins have their own bathrooms with separate showers.

The two VIPs are considerably larger, with big double beds, enormous wardrobes and large hull windows. Unfortunately, the yacht was moored alongside its neighbours in Monaco during the tour, so the windows couldn't really do their job, but there should be plenty of light and a fine view out at anchor.

There's a small drinks fridge in the cabin furniture, too, which is a nice touch for guests who fancy something cold without having to venture upstairs. The bathrooms have twin basins, separate toilet compartments and big showers, with sliding doors that close the whole area off from the bedroom. Those almost invisible rainfall showers appear here as well.

The wave pattern from the main saloon carries through into the cabins, sometimes in the woodwork, sometimes in the mirrors or carpet. It's quite subtle, and the contrast between the dark and pale timber is particularly nice in the VIPs. 

Crew Accommodation

It's in the crew quarters that the Sirena 42M makes another rather good impression. Four crew cabins are arranged on the lower deck, with a separate captain's cabin up beside the bridge. Each has its own bathroom, and the standard of finish in the cabin inspected is remarkably close to the guest accommodation. The doors, woodwork and bathroom fittings are all properly done. There's none of the rather basic treatment that can sometimes creep into the parts of a yacht the owner rarely visits.

The captain does particularly well, with a private en suite cabin just off the bridge, finished to much the same standard. It's also a sensible place for the captain to sleep, with the wheelhouse only a few steps away.

Down below, the crew mess has its own fridge, dishwasher and a decent amount of space to sit and eat. There's a separate laundry room with four machines, which gives some idea of the amount of work involved in keeping a yacht this size in order. Storage is good too, including the large dry store beside the galley that can be specified as a refrigerated room.

The crew also have their own routes through the yacht, with a staircase that connects the service areas and pantries on the main and upper decks. They can reach the side deck directly without passing through the main saloon, and the food lift serves all the way up to the sun deck.

The Sirena 42M has a steel fast-displacement hull designed by Van Oossanen, with an aluminium superstructure and twin MAN D2862 LE489 V12 diesels, each rated at 1,450hp. During sea trials, the yacht reached 16 knots, quite a respectable turn of speed for a steel superyacht of this size. But the more interesting figure is the range. With 46,000 litres of fuel aboard, Sirena quotes 4,600 nautical miles at 10 knots, enough for a transatlantic crossing with a fair bit to spare.

The engine room is big-ship stuff, with plenty of room around the enormous MAN engines and the two 80kW generators. The generators were running during the tour and making themselves heard, but there's no shortage of space to get at the machinery. The yacht also has an 83kW bow thruster, stabilisers and the sort of substantial auxiliary equipment you'd expect at this level. There are separate emergency escape routes leading directly to deck level, too. Further aft, a large, well-lit lazarette provides room for equipment and water toys, with access right back to the rudder gear. It's all very easy to get at.

But there's something rather special tucked away alongside the machinery. The tender garage is actually a watertight compartment designed to flood when its enormous pantograph door opens. Water rises inside the garage, allowing the tender to float straight in through the opening. A winch at the forward end then pulls it into position, where it can be secured inside the yacht. It's quite a piece of engineering, and there's a built-in refuelling station as well.

The garage can accommodate a tender up to 5.65m (18.5ft) long, which is a serious little boat in its own right. The arrangement keeps it completely enclosed when stowed, with the separate watertight compartment providing an important barrier between the garage and the machinery spaces.