2026 Catamaran Diamond Yachts EF66

Overview

The Diamond Yachts EF66 is a brand-new power catamaran that redefines luxury and comfort on the water, offering a rare opportunity for discerning buyers seeking a high-end cruising experience. With its sleek contemporary design, spacious layout, and customizable interior, this 2026 model delivers the stability, efficiency, and livability that have made power catamarans increasingly popular among experienced yachtsmen. 

Whether you are planning extended liveaboard cruising, long-range offshore adventures, or entertaining family and friends in style, the EF66 offers a versatile platform that adapts to your lifestyle.
 

Key Highlights

 

• Innovative spatial design with clean lines and open spaces. The thoughtful layout maximizes natural light and flow, creating a bright, airy atmosphere that enhances comfort during extended time aboard.
• Customizable flybridge with entertainment, dining, and activity zones. The upper deck can be tailored to your preferences — from outdoor dining and lounge seating to sunbathing areas or a wet bar for social gatherings.
• Twin Cummins QSB6.7 engines delivering 550hp each for a cruising speed of 12 knots. The reliable diesel powerplants provide efficient long-range cruising, with the fuel economy that catamaran owners value for extended voyages.
• Spacious accommodations with 4 guest cabins and 2 crew cabins. The generous layout comfortably sleeps eight guests in private staterooms, plus separate crew quarters for professional operation or additional family.
• Large fuel capacity of 4,000 liters for extended range. The substantial tankage supports long-distance cruising without frequent refueling, ideal for remote destinations or extended island-hopping itineraries.
• Fiberglass construction with a robust vertical bow for enhanced seaworthiness. The durable composite build and wave-piercing bow design deliver confidence-inspiring performance in varied sea conditions.

 

Use Case & Ideal Buyer

The Diamond Yachts EF66 is perfectly suited for families or groups seeking a luxury liveaboard or long-range cruiser that combines stability with genuine offshore capability. The power catamaran design offers exceptional fuel efficiency compared to monohulls of equivalent length, while the shallow draft opens up anchorages inaccessible to deeper vessels. 

Whether you are planning coastal cruising, island hopping in the Bahamas or Caribbean, or extended offshore passages, the EF66 delivers the range, space, and comfort for serious cruising. The customizable interior allows buyers to tailor the space to their specific needs — from family-focused layouts with flexible sleeping arrangements to entertainment-oriented configurations with generous social areas.
 

Ownership Insight

As a new build, the EF66 incorporates the latest construction techniques, onboard systems, and Cummins diesel technology — all covered by full factory warranties that minimize unexpected expenses during initial ownership. Power catamarans generally offer better fuel efficiency than monohulls of comparable size, reducing operating costs over years of cruising. The Cummins engines are renowned for reliability and global service support, while the fiberglass construction ensures long-term durability and predictable maintenance requirements. 

The yacht's substantial holding tank capacity supports extended cruising without frequent pump-outs, enhancing self-sufficiency. Resale value is expected to hold well given Diamond Yachts' growing reputation and the sustained market demand for quality power catamarans in this size range.
 

Buying Advice

This Diamond Yachts EF66 is a build-to-order yacht, allowing you to define every detail — from interior finishes and cabin configurations to flybridge layout and electronics packages — to match your exact cruising preferences. Contact Yachting Select, the exclusive North American dealer, to discuss customization options and current pricing, and to secure a delivery slot for the 2026 season before production schedules fill. 

Act now to ensure your place in line for this exceptional power catamaran, as demand for new Diamond Yachts continues to grow among knowledgeable buyers who recognize the value of a truly personalized luxury cruising platform.