Design Pedigree and Naval Architecture
The 620's design team reads like a who's-who of high-end French boatbuilding. Van Peteghem and Lauriot-Prévost — the VPLP studio responsible for some of the most accomplished cruising and racing multihulls in the world — handled the naval architecture, while the interior was entrusted to Hervé Couëdel and Pierre Hugon, a duo whose previous credits included the 90-foot monohull super-yacht ZURBAGAN and the 104-foot ONLYNOW. Couëdel holds a diploma from the prestigious École Boulle. The result of this two-year technical marathon was what Multihulls World called the most impressive genuine production catamaran ever built at the time of its launch.
Construction is foam sandwich with resin infusion, a process that delivers stiffness and weight savings across hulls and decks. The platform spans a full ten meters of beam, giving the 620 a deck footprint that few production sailboats of any type can approach. Draft sits at a modest 1.55 meters, permitting access to anchorages that would exclude deep-keeled monohulls of comparable length.
Rig, Sail Plan, and Handling
The 620 carries a fractional sloop rig with a rotating spar, a configuration that allows the mast to weathervane slightly into the wind, reducing drag and improving the aerodynamic efficiency of the mainsail. The mast rises 31 meters above the waterline — a considerable stick that gives the 620 meaningful upwind authority despite her displacement.
Working sail area is 2,550 square feet upwind, composed of a 1,572-square-foot mainsail and a 980-square-foot genoa. The sail-area-to-displacement ratio of 23.89 places the boat firmly in "relatively high performance" territory for a vessel of this size and purpose. Downwind, a gennaker extending to 2,045 square feet or a Code 0 of 1,991 square feet brings total downwind canvas to 4,801 square feet, numbers that allow the 620 to move purposefully in light conditions — a critical quality for a cruising catamaran frequently sailing in the tradewinds at angles that favor the asymmetric inventory.
Twin diesel engines producing 150 horsepower each handle maneuvers in close quarters and provide reassurance in calm or contrary conditions. Fuel capacity of 1,376 liters gives meaningful range under power.
Deck Layout and Socializing Zones
Cruising World's review noted that the cockpit control station is elevated to a fly bridge, freeing the main deck aft of the saloon for a dedicated social zone. This arrangement creates multiple discrete areas for crew and guests to gather without congesting a single space. Under the rigid aft-deck awning, which extends the saloon roof, a large dining area is served by a wet bar — a feature that transitions naturally between sea days and anchorage evenings.
Port and starboard helms give the skipper situational flexibility, whether docking, reading sail trim, or monitoring the surrounding water from a commanding height. With so much deck area, Multihulls World observed that there are enough quiet corners for everyone, a quality that makes the 620 function effectively as a liveaboard platform and as a luxury charter yacht.
Accommodations
Flexibility defines the 620's cabin arrangements. The boat is available in layouts ranging from three to five double cabins, all featuring island beds and dedicated ensuite heads with stall showers. In one configuration, the galley occupies the aft end of the port hull, with independent access both to the saloon and directly to the deck through its own companionway — a detail that matters enormously in a charter context, where provisioning and service flow need to be managed without disrupting guest areas.
Water tankage of 960 liters supports extended offshore passages with a full complement aboard, and the CE certification of Category A for 14 persons confirms the designer's assessment of the boat's offshore capability. The 620 carries European certification for ocean passages with up to fourteen people — a significant endorsement of structural and stability margins.
Multihulls World described the 620 as a real private owner's boat, which may also tempt those who want to launch into luxury charter, and the cabin flexibility makes both applications genuinely viable without compromise.
Known Characteristics and Passage Considerations
The displacement-to-length ratio of 149.05 places the 620 in the light-to-moderate range for a vessel of this waterline length, which translates to lively motion in a seaway rather than the ponderous predictability of heavier bluewater designs. The KSP (Kelsall Sailing Performance) figure of 0.73 suggests the boat will achieve approximately 7 knots in 10 knots of true wind — respectable for a vessel of this size and purpose. Substantial fuel tankage means motoring through calms is a viable strategy rather than a reluctant concession.
The CE Category A rating covering up to fourteen persons reflects the structural integrity of the foam-sandwich resin-infused construction, but owners undertaking extended offshore passages should approach the 620 with the same preparation they would give any large catamaran: the beam that creates interior volume also demands careful attention to load management and downwind sail selection in building conditions.
The Verdict
The Lagoon 620 is what happens when a production builder commits fully to the upper end of the market and assembles a design team capable of realizing that ambition. VPLP's naval architecture, Couëdel and Hugon's interior craft, and Lagoon's resin-infusion construction combine to produce a vessel that genuinely earns its position at the top of the production catamaran hierarchy. The rotating fractional rig and generous downwind sail inventory give her real sailing performance, and the multi-zone deck architecture makes living aboard — or hosting guests — an exercise in considered luxury rather than mere bigness.
Pros
- VPLP naval architecture with a rotating fractional spar and an SA/D ratio above 23 delivers genuine performance for a vessel of this displacement
- Resin-infused foam-sandwich construction throughout hulls and deck
- Three-to-five cabin flexibility with island beds and ensuite heads in every layout
- CE Category A ocean certification for fourteen persons
- Multiple discrete socializing zones separated by the fly-bridge helm arrangement
- Fuel and water tankage scaled for extended passages
Cons
- 32-foot beam demands careful slip selection and adds complexity in tight marina environments
- Light-to-moderate D/L ratio means motion in a seaway is more active than heavier displacement alternatives
- Mast height of 31 meters imposes air-draft restrictions in bridged or low-clearance waterways
- Scale and systems complexity require experienced crew or a professional delivery/management arrangement
