21 ft Round Winter Covers for Above Ground Pools

A 21 ft round pool takes a 24 or 25 ft round cover; the extra is the overlap that drapes over the top rail. Pool measures 19 or 20 ft? Use this size.

13 covers available
More covers for a 21 ft round pool 2 out of stock

Questions about this size

What size winter cover fits a 21 ft round above ground pool?

A cover labeled for a 21 ft round pool. It is cut 24 or 25 ft across, depending on the brand: Cypress and Swimline cut it 24 ft; Cypress, GPC and PoolTux cut it 25 ft. Each card shows its own cover size.

My pool measures 19 or 20 ft. Which size do I order?

Choose the next size up, 21 ft. A little more overlap still cinches down with the cable; a cover that is short will not reach under the rail.

What size air pillow for a 21 ft round pool?

The pillow sizing chart we follow recommends a 4 x 8 ft pillow for a 21 ft round pool. It sits under the center of the cover and takes the push of the ice off the walls.

Which 21 ft round cover has the longest warranty?

The PoolTux BB0021, with a 25 year warranty. Each card lists its warranty where the maker states one.

What kinds of covers are there for a 21 ft round pool?

For this size: solid covers, bundles (cover, closing kit and air pillow), a mesh cover and a leaf net. The buttons above the covers show one kind at a time.

Other round sizes

Select pool size

12 ft round15 ft round16 ft round18 ft round21 ft round24 ft round27 ft round28 ft round30 ft round33 ft round
All above ground winter covers, round and oval