Do you drain an above ground pool for winter?

No, not fully. A permanent steel or resin above ground pool is winterized with water still in it, lowered only to just below the skimmer and return, typically 4 to 6 inches down. The water supports the wall against soil and snow pressure and stops the liner shrinking. A completely empty pool can distort, and an empty liner in cold weather goes brittle and cracks at the folds. Only soft-sided inflatable and thin metal-frame kit pools are drained and stored.

Will an above ground pool freeze and crack?

The water freezing is expected and is not the problem; the plumbing and equipment are. Ice on the surface is normal in northern winters, and a properly winterized pool uses air pillows so the expanding ice pushes inward against the pillow rather than outward against the wall. What actually cracks is anything holding trapped water — pump volute, filter tank, heater exchanger and rigid returns. Drain and plug all of it, and store the pump indoors if you can.

Can you leave a pool up in a mild climate?

Yes, and in much of the South and Southwest you keep it open rather than winterizing at all. Below about 65°F water temperature, chlorine demand drops sharply and you can cut circulation to a few hours a day while still testing weekly. Do not stop circulating entirely, and keep a sanitizer residual, because a stagnant warm pool grows algae fast. Set the pump to run on a freeze sensor if overnight temperatures ever approach 32°F.

Does leaving a pool up all year shorten the liner life?

Not on a permanent above ground pool — the opposite. Liners fail from drying out, from UV exposure and from being folded, all of which happen when a pool is drained and packed away. A liner that stays wet and covered lasts longer, and 6 to 10 years is the usual life on a well-kept above ground pool. What does shorten liner life is running the water chemistry out of balance over winter, especially low pH, and letting the cover collapse into the water.

Is snow load a problem on an above ground pool?

Snow on the cover is, not snow on the frame. A solid winter cover holding water and snow can weigh hundreds of pounds and pull the cover, the cable and sometimes the top rails inward. Use a cover pump or siphon to keep standing water off the cover through winter, and clear heavy snow where you can reach it safely. Air pillows underneath help by shedding water toward the edges. Never walk on a winter cover for any reason.

Can You Leave an Above Ground Pool Up All Year?

Written & researched by Derek Holt Home & Appliances Editor

Updated October 2026

Over-the-shoulder view of a person skimming leaves from the surface of a backyard pool, in soft early-morning light

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Yes — a permanent steel or resin-framed above ground pool is designed to stay up year-round, and in freezing climates you winterize it with the water still in it rather than taking it down. Lower the level 4 to 6 inches to just below the skimmer and return, blow out and plug the lines, drain and store the pump and filter, add an air pillow and cover it. Only soft-sided inflatable pools and lightweight metal-frame kit pools should be drained and packed away for winter.

Which pools stay up and which come down?

The distinction is structural. A permanent pool carries its load through a steel or resin wall and top rails, and the water inside actually helps brace it. A soft-sided pool relies on the water for its shape and has no frame worth speaking of once empty, and its thin liner is not built for freeze cycles.

Pool type	Leave up over winter?	Note
Steel-wall above ground	Yes, winterize with water in	Watch for rust at the base and under the skimmer
Resin or hybrid above ground	Yes, winterize with water in	Best cold-climate choice, no corrosion
Aluminum-wall above ground	Yes	Check wall fasteners each spring
Metal-frame kit pool	Mild climates only	Frame legs and liner are not freeze-rated
Inflatable ring pool	No — drain and store	Vinyl goes brittle below freezing
Soft-sided fabric pool	No — drain and store	Store dry and unfolded where possible

If you are still choosing a pool and cold winters are part of the picture, the material decision matters more than almost anything else — the comparison is in steel versus resin above ground pools, and current model rankings are in best above ground pools.

Three-quarter view of a person skimming leaves from the surface of a backyard pool, in soft early-morning light

What actually gets damaged by freezing?

Not the pool wall and not usually the liner. The casualties are always the components that hold trapped water in a rigid container, because water expands roughly 9 percent as it freezes and has nowhere to go.

Pump volute. Cracks if the drain plugs are left in. Remove both plugs entirely and keep them in the strainer basket.
Filter tank. Drain it, leave the drain cap off, and store cartridges clean and dry indoors.
Heater exchanger. The most expensive freeze casualty on any pad. Drain per the manufacturer instructions.
Skimmer face and returns. Water sitting in the skimmer throat splits the plastic. Lower the level below both, or fit a winter skimmer plate.
Rigid plumbing. Blow the lines clear and plug them, or fill with a pool-rated antifreeze — never automotive antifreeze, which is toxic.
Chlorinator and salt cell. Remove, rinse and store indoors.

The full closing sequence, in order, is in how to winterize an above ground pool.

Low-angle view of a person skimming leaves from the surface of a backyard pool, in bright midday sun

How low should the water be over winter?

Four to six inches below the skimmer opening and the return fitting is the standard target for a pool with a solid winter cover. That is low enough to keep water out of the skimmer throat, and high enough that the wall stays braced and the liner stays supported. Pools using a skimmer cover plate can stay higher, right up under the top rail, which some installers prefer because it maximizes wall support.

Two things go wrong at the extremes. Drain too far — below about a third of the wall height — and the liner can shrink, pull away from the coping and no longer fit come spring, while the wall loses the inward bracing that helps it resist frost heave in the surrounding soil. Leave it too high with a solid cover and melting snow raises the level over the cover edge. Air pillows solve most of it: they take up the expansion of surface ice and keep the cover crowned so water and snow shed to the perimeter where a cover pump can move it.

Golden-hour view of a person skimming leaves from the surface of a backyard pool

What if you never freeze — can you just keep it running?

In climates that rarely drop below freezing, many owners keep the pool open year-round, and it is genuinely less work than closing and reopening. The routine changes rather than stops. Below about 65°F water temperature, chlorine demand falls a long way, so a residual of 1 to 3 ppm is easy to hold and the CDC-recommended pH range of 7.2 to 7.8 still applies. Cut circulation to three or four hours a day, keep testing weekly, and clean the filter on pressure rather than on the calendar.

Set freeze protection if there is any chance of a hard night. Most timers and variable-speed controllers have a freeze sensor mode that starts the pump automatically below about 37°F, because moving water is far more resistant to freezing than still water. Off-season run times are covered in how long a pool pump should run per day, chemistry targets in what pool pH and chlorine levels should be, and liner expectations in how long an above ground pool liner lasts.

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