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What happens if a pool is not winterized

Author

Ava Wright

Published Apr 11, 2026

The harsh weather conditions throughout the winter season can create potential damage to more than just the pipes. What happens when you don’t winterize your pool is that the water could turn green with algae. If the chlorine system stops functioning, you’ll say adieu to the beautiful blue pool you know and love.

Is it necessary to winterize a pool?

You will want to close your pool properly over the winter to prevent freezes from damaging expensive pool equipment. Surface freezes can also tear through vinyl liners as a result of ice expansion. A second reason to winterize your pool is because most people completely stop maintenance over the winter.

What happens if inground pool freezes?

Mild climate pools often freeze across the surface overnight. However, if the ice sheet becomes thicker than ¼” to ½”, it will put pressure on your pool tile and skimmers as the ice expands. … Ice can crack tile or loosen the grout, letting small pieces of tile come loose.

Do you have to winterize an inground pool?

It all depends on where you live. Homes in sunny Southern California or Arizona probably won’t have to close at all. But if you live where it gets frigid, your pool will need to be winterized before temperatures dip to 32 degrees Fahrenheit to prevent water from freezing.

At what temperature will inground pool pipes freeze?

If you have an above ground pool with the pool filter system and plumbing above ground (like nearly all above ground pools), pipes and pumps can freeze up in less than an hour of minus 32 degrees. The same is true for inground pool equipment that is not running when temperatures are below freezing.

How long does it take to winterize a pool?

Depending on how you’re removing the water from your pool, this process may take a day or two.

How much does it cost to winterize a pool?

Most homeowners will spend between $125 and $375 to have their pool winterized by a professional. The national average reported cost is $232. The minimum cost a homeowner paid was $50 while the maximum reported cost was $700.

Can you winterize a pool without a cover?

One question many people have when it comes to winterizing their pool is: Is it necessary to cover my pool in winter? The short answer is no, it’s not necessary. But it’s not necessary just like brushing your teeth is not necessary and you’ll survive if you don’t.

Should I close my pool for the winter?

In most cases, pool owners use fewer chemicals during the winter than spring and summer. The cooler temperatures preserve the chemicals in your water. That means you are losing less chlorine and water through evaporation. … For some, this may be the only reason they need to close their pool for winter.

Can I leave my above ground pool uncovered in winter?

No, but winter covers protect your pool from stains, algae growth and poor water balance that could damage pool surfaces. … However, if you want to close the pool, but keep it uncovered all winter, or if you need to delay purchasing a new cover until next fall – here are the steps we took to do it for our customer above.

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What happens if an above ground pool freezes?

Aboveground Wall Collapse: If a pool begins to leak water, while the winter pool cover is frozen solid into the ice sheet – either the cover will rip, or the pool walls will collapse inward. … Water expands about 9% when it freezes, so use enough Air Pillows to cover about 10% of the pool surface area.

What do you do when your pool freezes?

  1. Run the filtration pump and all auxiliary pumps continuously (the pool cleaner pump does not need to run). …
  2. Break up any ice on the pool and spa surfaces to keep the skimmers and skimmer doors free from ice.

What temp will a pool freeze?

What temperature does a pool freeze? A chlorinated swimming pool freezes at around 32 degrees Fahrenheit, the same temperature as non-chlorinated water.

Will moving pool water freeze?

Be sure to run your pool pump continuously when temperatures are near or below freezing. You don’t need to run your heater, moving water will not freeze.

How do I protect my pool pipes from freezing?

Insulate plumbing lines with blankets or towels to prevent freezing. Even pool noodles can serve as good insulation around pipes. Open all lines to ensure proper water flow. If a valve is shut off, no water will be flowing through that pipe and there is the danger of freezing damage.

Can I leave my pool empty?

It is not advised to leave a pool empty for extended periods: Depending on the level of the water shelf, sustained pressure on an in-ground pool without water can cause external damage. Additionally, a drained above-ground pool can receive structural damage from the elements.

Should I let my pool freeze?

Quick answer: No. Do NOT let your pool freeze. … While a thin layer of ice is unlikely to damage your pool, if you live in an area with continuous below-freezing temperatures, we highly recommend you winterize and close your pool at the end of swimming season. Keeping your pool open all year long is also an option.

How much shock Do I need to winterize my pool?

Several days before closing, shock the pool with a chlorine shock or non-chlorine shock, using at least 2 lbs per 10,000 gallons (follow package directions). Allow the chlorine level to return to 1.0-3.0 ppm before adding any winter algaecide or your pool cover.

What happens if you leave a pool uncovered in winter?

For one thing, an uncovered pool will become a catch-all for leaves and debris. Those leaves will spend all winter stewing away in the bottom of your pool. … Floating chunks of ice, branches, and other sharp objects can make it into the pool over the winter, which can cause liner cuts and tears.

Can I leave my Bestway pool up in winter?

At the end of summer, you may be wondering how to care for your above-ground pool. It’s possible to leave your above-ground pool up all winter with the water in it, since draining it completely may cause it to collapse.

How do you winterize an above ground pool?

  1. Balanced Water Chemistry. …
  2. Shock the Pool. …
  3. Clean the Pool. …
  4. Remove Accessory Items. …
  5. Lower Water Level. …
  6. Drain & Plug the Pipes. …
  7. Drain the Equipment. …
  8. Lubricate O-rings.

Is it too early to close my pool?

Begin Winterizing One Week Before Closing Your Pool We recommend waiting to close your pool until the water temperature is consistently below 65 degrees. Closing too early will run the risk of algae growth.

What chemicals do I need to winterize my pool?

  • Chlorine.
  • Pool Shock.
  • Soda Ash.
  • Baking Soda.
  • Muriatic Acid.
  • Winter Algaecide.
  • Pool Antifreeze.
  • Stain and Scale Prevention.

How do you get ice out of an above ground pool?

Use a leaf blower on light, powdery snow to blow the snow off the cover. Wait for frozen snow and ice to melt on its own if it is a solid sheet on the cover. If you have a cover pump and it is buried under ice, pour a few gallons of hot water into one spot on the cover to let the device do its job.

How much chlorine is needed to winterize a pool?

Super chlorinate with liquid chlorine or other chlorine source and add winterizing chemical kit to pool; allow filter to circulate to evenly distribute chemicals. (Use chemicals as labels indicate.) Use 1 gallon of liquid chlorine per 10,000 gallons of pool water.

Does salt water in a pool freeze?

Chlorinated and non-chlorinated pools freeze at the same temperature. However, salt water pools will freeze at a slightly lower temperature. It should also be noted that above-ground pools will generally freeze at a higher temperature than inground pools.

How do you unfreeze a pool pump motor?

Bring the pump housing into an area where the temperature is above freezing. Eventually, the ice in the pump melts and the pump can be flushed, winterized and reconnected back into the filtration lines of the pool.