St. Barth 85 Fly Video Review: A Full Owner's Deck and a Bow Jacuzzi
By the YachtWay editorial deskUpdated October 2026Video walkthrough7 min read
The St. Barth 85 Fly is an 85 ft aluminium tri-deck built in the Netherlands by a founder who could not find the right 85 footer and decided to build one. We walked her in Monaco. She has a swim platform that extends, a tender garage, a jacuzzi at the bow, a flybridge with a grill and a folding arch, a beach club with a bar, an owner's suite on its own deck, a main deck galley and three guest cabins.
An 85 footer that feels like a 110
St. Barth's founder runs wellness centres, and the jacuzzi at the bow shows it: it fills and drains in minutes, and the water stays warm in a tank that also helps stability. The boat is designed for owner operators, with 360 cameras, a Dockmate wireless remote and a security camera aft. The whole interior sits on rubber mounts to keep the aluminium hull quiet.
What stood out on board
- A jacuzzi at the bowIt fills and drains in minutes and stays heated, from a tank that also helps stability.
- A full owner's deckThe owner's suite sits aft next to the beach club, waking up to the view astern.
- A swim platform that extendsIt slides out a few feet, then lowers into the water as a private beach.
- Cleats with winches built inA clever detail we had not seen on a boat this size.
- Tables that slideOn the main deck aft, the tables rise and slide toward the seats.
- A quiet aluminium boatThe whole interior sits on rubber mounts against vibration and echo.
Spec sheet at a glance
| Feature | What you get | The benefit |
|---|---|---|
| Length overall | 85 ft (25.9 m) | A tri-deck at 85 ft |
| Beam | 21 ft (6.4 m) | Room for a full owner's deck |
| Draft | 5 ft 5 in (1.65 m) | Fine for Med anchorages |
| Weight | 63 t (138,891 lb) | Light, thanks to aluminium |
| Tanks | 1,585 gal fuel, 396 gal water (6,000 L, 1,500 L) | Long passages between stops |
| Engines | 2x Volvo Penta D13-IPS1350 | Joystick, Skyhook and Dockmate |
| Speeds | 25 to 28 kn top, 700 nm range (builder figures) | We did not sea trial this boat |
| Layout | Owner's suite aft, three guest cabins, crew cabin | Guests separate from the owner |
| Stabilisers | Fins on both sides | Rock steady at anchor |
| Toys | Tender garage, two Seabobs | Stored out of sight |
| Galley | Teppanyaki plate, oven, three-minute dishwasher | Open to the main deck |
| Generators | Two Northern Lights | One small one for quiet nights |
Swim platform and aft deck
The swim platform slides out, then lowers into the water with steps. Two loungers sit on the aft deck, with room for freestanding furniture or a yoga mat.
- Shower.An Elka rain shower with hot and cold water.
- Cleats.With winches built in.
- Grill.A Kenyon grill, the first of two.
- Garage.A tender garage with the engine room below.
- Seabobs.Two, in a locker to starboard.
- Cameras.Garmin 360 and a security camera aft.
Bow and jacuzzi
The side decks are wide and flush. At the bow there is C-shaped seating with coffee tables, a sunbed and a jacuzzi.
- Jacuzzi.Fills and drains in minutes, with water kept warm.
- Lighting.Pop-up lights facing fore and aft.
- Fridge.Right by the lounge.
- Shade.Carbon poles for a Bimini.
- Overhang.Keeps the sun out of the helm windows.
Main deck aft lounge
Gates close off the main deck aft lounge, under a large overhang with speakers and a subwoofer.
- Tables.Rise at the push of a button and slide closer to the seats.
- Access.A gap between tables so no one has to climb out.
- Sunbed.Large enough for several people.
Flybridge
Gentle stairs lead up, and a cover slides across the stairway for kids. Forward there is a summer kitchen with the second grill.
- Helm.A wide seat, a joystick and a Garmin for the guest.
- Lounges.Two L-shaped seating areas.
- Sunbed.Memory foam pillows and a low glass screen.
- Arch.Folds down for low bridges.
- Mast.A custom 360 camera, Starlink and radar.
Beach club and owner's deck
Inside at the stern there is a beach club, and just forward of it the owner's suite takes its own deck, with the view aft.
Beach club
- Bar.A sink, two fridges and a removable champagne bucket.
- Seating.An L-shaped sofa by large windows.
- Day head.With a marble column and LED lighting.
- Laundry.A washer-dryer behind the bar.
Owner's suite
- Bed.A king with a textured headboard and bronze lights.
- Vanity.A swivel chair and a hidden mirror.
- Shower.Reached from the bed, with a large rain shower.
- Sink.An art piece that looks like a seabed.
Galley, helm and guest cabins
The main deck has an open galley and dining for eight to ten, with windows that slide down. The guest cabins are below, away from the owner.
Galley and helm
- Cooking.A teppanyaki plate, a cooktop and an oven.
- Dishwasher.Commercial, done in three minutes.
- Wine.A dual-zone Liebherr wine fridge.
- Helm.Three large Garmin screens and a side door.
Guest and crew cabins
- Guest cabins.Three, each with a walk-in rain shower.
- Crew cabin.A twin and two bunks, with its own entrance by the jacuzzi.
Engine room
- Engines.Twin IPS 1350s, far from the owner's suite.
- Generators.Two Northern Lights units.
The St. Barth 85 Fly is full of ideas from a very hands-on founder. The bow jacuzzi, the extending swim platform and the owner's deck by the beach club are rare on an 85 footer, and the tri-deck layout gives everyone room. She is easy to run yourself, quiet inside despite the aluminium hull, and finished with care in every cabin. For a family that wants a big-boat feel without a 110 ft yacht, she is worth seeing.
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