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Sailboat Specifications

Windward 21 Macgregor

Cutter · Swing Keel

Designed by Roger Macgregor · Built by Windward Yacht (Usa) · First built 1966

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LOA 21.00 ft  ·  Beam 6.83 ft  ·  Displacement 1,200.00 lb  ·  Sail Area 175.00 ft²  ·  Cutter  ·  Swing Keel
About the Windward 21 Macgregor Sailboat

Designed by Roger Macgregor in the mid-1960s, this compact cutter represents an interesting chapter in small boat design from the era when trailerable sailboats were gaining popularity. Built by Windward Yacht from 1966 to 1969, the design showcases several practical features that made it appealing to sailors seeking an affordable entry into cruising. The swing keel configuration allows for shallow water exploration and easy trailering, while the cutter rig provides excellent sail handling options and weather helm control. At 1,200 pounds displacement with 400 pounds of ballast, this fiberglass boat strikes a reasonable balance between portability and stability for its size class. With a comfort ratio of 7.45, the boat leans toward the sportier side of the spectrum, making it well-suited for day sailing and weekend coastal cruising rather than extended offshore passages. The 175 square feet of sail area provides adequate power for typical conditions, while the hull speed of 5.76 knots offers respectable performance for a boat of this length. The design works best for sailors interested in coastal exploration, club racing, or learning cruising fundamentals in protected waters. Its compact size and swing keel make it particularly appealing for those with limited marina access or storage constraints.

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Dimensions & Specifications
LOA (Length Overall) 21.00 ft / 6.40 m
LWL (Waterline Length) 18.50 ft / 5.64 m
Beam 6.83 ft / 2.08 m
Max Draft 5.50 ft / 1.68 m
Min Draft 1.00 ft / 0.30 m
Displacement 1,200.00 lb / 544 kg
Ballast 400.00 lb / 181 kg
Sail Area (Reported) 175.00 ft² / 16.26 m²
Design & Construction
Hull Type Swing Keel
Rigging Type Cutter
Construction FG
Designer Roger MacGregor
Builder Windward Yacht (USA)
First Built 1966
Last Built 1969
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Frequently Asked Questions

What is the Windward 21 Macgregor's sail area to displacement ratio?

The Windward 21 Macgregor has a Sail Area to Displacement ratio (SA/D) of 24.84. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Windward 21 Macgregor's comfort ratio?

The Windward 21 Macgregor has a Ted Brewer Comfort Ratio of 7.45. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Windward 21 Macgregor safe for offshore sailing?

The Windward 21 Macgregor has a Capsize Screening Formula value of 2.57. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Windward 21 Macgregor?

The theoretical hull speed of the Windward 21 Macgregor is 5.76 kn knots, calculated from its waterline length.

How much does a Windward 21 Macgregor weigh?

The Windward 21 Macgregor has a displacement of 1,200.00 lb and a length overall (LOA) of 21.00 ft.

Who designed the Windward 21 Macgregor?

The Windward 21 Macgregor was designed by Roger Macgregor, first built in 1966.