Diamond EF66 Catamarã

Buying the Diamond EF66 while she is still in build means choosing her rather than accepting her. Diamond Yachts is building this power catamaran to order for 2026 delivery, and the cabin layout and much of the specification are still open to the next owner's decisions rather than fixed on a line. That is what ownership looks like before she exists: a series of choices, not an inspection.

Build and provenance

She is a catamaran, not a monohull, which is the decision that shapes everything else about her: two hulls set 9.8 metres apart at the beam, the width that gives a boat this length her interior volume. Diamond Yachts builds to individual specification rather than to a fixed configuration, so the next owner is buying a platform first and a finished layout second. At 68 feet, the Diamond EF66 is still on order rather than afloat.

Layout and accommodation

The builder offers multiple interior layouts on the EF66, and the next owner chooses among them before she is finished: up to five cabins for ten guests, with crew space still to be settled as part of the build. The stern doubles as a with a behind it, so the and the garage are already fixed points that the interior layouts are built around.

Performance and engineering

Two Cummins QSB6.7 diesels give her a 10-knot cruise and a 15-knot top speed, catamaran numbers that trade outright pace for a stable, level ride across the twin hulls. She carries 396 gallons of water, tankage that matters on a boat an owner is more likely to keep out for days than for an afternoon.

On deck and at anchor

At anchor, the stern will see the most use, with the keeping the clear of gear underway. The adds a second entertaining deck above it, so a build-to-order buyer is really specifying two outdoor living spaces rather than one.

Where she lies and how to see her

The Diamond EF66 is being finished for delivery in Fort Lauderdale. Boatcrowd will arrange a viewing of her build and be there with you, and once an offer is accepted, survey and sea trial follow before she is handed over.