Pool closing – Winterizing Pools and Hot Tubs

Pool closing – Winterizing Pools and Hot Tubs

When we think about pools and spas we most often think of fun times with family and friends, but for some of us that doesn’t last year round. If you own a pool or spa and have below freezing winters, then you need to take certain steps to winterize your pool and prevent water from freezing in your pipes and/or equipment and causing them to crack. 

You also need to balance your water chemistry and clean the surface of your pool or spa before it’s winter hibernation. Taking time to prepare your pool or spa for it’s winter nap can save you from expensive repairs or the hassle of fighting green water the next season.

And when it’s time to open again, Sutro pool chemistry monitor can help you keep your water clear and safe by checking your pH, alkalinity, and chlorine levels 3 times per day and recommending adjustments when needed.

Let’s take a look at the steps to follow for hassle-free pool closing.

Winterizing for all types of pools & hot tubs

Above ground pool winterization

If you own an above ground pool you should plan on getting a cover to prevent debris from entering the pool during the winter and plan on moving your equipment inside to protect it from freezing temperatures if possible.

Closing kits can also be a good idea as they have everything you need based on the size of your pool. There are several more steps needed and we have outlined them for you in our winterizing an above ground pool post.

Inground pool winterization

If you own an inground pool, apart from closing you too should plan on getting a cover, and you will need to take some additional steps like blowing out lines, plugging, and using pool antifreeze to protect your pump and pipes from the freezing temperatures.

Similar to above ground winterization, Closing kits can make things easier for inground pools as well. Here’s more information on how to winterize your in ground pool

Hot tub winterization 

Unlike pools, it’s much easier to simply drain hot tubs and refill them, so hot tub winterization is a bit different. For example, there is no need to fill lines with pool antifreeze and plug them.

Other helpful tips for winter

  • Some people ask if they should test over the winter. If the temperature gets above 65℉ while you have your pool closed and you know it will drop below freezing again before warming for good then you may want to test the water.


  • Another useful tip is to use a heater or a solar cover to help extend the pool season before it gets too cold and you have to close the pool. There are a few different ways to heat a pool depending on factors such as where you live and what the temperature patterns are.
  • Just because it’s too cold to swim doesn’t mean you can ignore safety. Unfortunately we have heard of multiple cases where children and pets have made their way into pools, even when there are covers on them. Pool safety is 24×7 and 365 and holds true even during the winter.
It’s not as fun as swimming or lounging, but taking the time to properly winterize can make it easier and faster when it’s time to jump back in again.  Sutro pool water monitoring can also make it easier and faster all season long by checking your pH, alkalinity, and chlorine levels 3 times per day and recommending adjustments when needed.


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