Boat Covers: Types, Fabrics and How to Get the Right Fit

Updated October 31, 2026

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A good boat cover keeps out rain, sun, leaves and animals, and helps prevent water from pooling in the boat while it's stored or trailered.

Types of boat covers

Type	Use	Notes
Trailerable cover	Storage and towing on a trailer	Needs secure straps rated for highway speed
Mooring cover	Boat in the water at a slip	Fits around the hull above the waterline
Custom-fit	Made for your boat's make and model	Best fit, usually higher cost
Semi-custom or universal	Sized by boat type, length and beam	Cheaper; check the length and beam range

Fabrics

Solution-dyed acrylic and polyester are common outdoor boat fabrics; compare the maker's water resistance and UV claims.
Breathability matters to limit mildew.

Measuring

Measure centerline length from the bow tip to the transom (not including swim platforms or motors unless the maker says to) and the beam (widest point). Note any T-top, windshield or trolling motor.

Prevent pooling

Use support poles or a support system so rainwater runs off instead of pooling, which can stretch or tear the cover.

Where to shop

Renting rather than owning? See BigSkipper's boat rental guides.