The Naiad 18 is a Canadian trailerable sailboat, that was designed by Mark Ellis, first built from 1984 to 1986, and named for the mythological water sprites.

[2][3][4] The boat was built by Luna Yachts in Oakville, Ontario, Canada, between 1984 and 1986, but it is now out of production.

[1] The Naiad 18 is a small, open, recreational keelboat, built predominantly of fiberglass, with wood trim.

It has a cat rig, a plumb stem, a vertical transom, a transom-hung rudder, a wishbone boom and a centerboard that folds up into a trunk.

[2][4] The boat can be optionally fitted with a small outboard motor for docking and maneuvering.