Can a swimming pool freeze
Emma Valentine
Published Mar 05, 2026
Yes, they can freeze solid. If temperatures reach below zero, swimming pools that are not circulating can freeze solid within a few days. If those low temperatures continue for several days, the ice sheet can increase in thickness by up to ¼” per day.
How cold does it have to be for a pool to freeze?
What temperature does a pool freeze? A chlorinated swimming pool freezes at around 32 degrees Fahrenheit, the same temperature as non-chlorinated water.
What to do if pool starts to freeze?
If the pool is already frozen more than 1/2″ thick, wait for a bit of a thaw before lowering, or break up the ice first before and while lowering the water level. For safety pool covers, be careful not to lower the pool more than 12″ below the tile line.
What happens if a pool freezes?
If there is any water left in the pipes of your pool plumbing, the water will freeze, and Physics 101 class tells us water expands when it freezes, up to 10%, and that’s enough to crack pipes, pumps, filters, heaters, skimmers, and other things – that are full of water.Do chlorine pools freeze in the winter?
At what temperature does 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.
Will pool freeze if pump is running?
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. … Water feature pumps should be run and valves should be open. Alternately, you can cover and drain the pump and pipes.
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.
Does above ground pool water freeze in the winter?
Above ground pools will freeze solid from side to side within a few days in temperatures below zero degrees. However, very rarely will a pool freeze all the way to the bottom. The ice sheet at the top will typically become thicker by one-fourth inch every few days.How does freeze protection work on a pool?
Freeze Protection Units allow pool and spa owners to set a desired temperature where their pump and heater will automatically turn on. Once the climate drops to the specified temperature, the Freeze Protection Unit kicks in. It turns on your pump and heater to keep the water moving, which prevents freeze expansion.
How do I keep my pool pump from freezing?Keep your pumps running at all times during freezing temperatures. Remove winterizing plugs from the pump, filter, heater and any other equipment that can be drained. Install a Freeze Protector, which is a device that circulates the pool water when temperatures are 38°F or below.
Article first time published onHow do I protect my pool during a hard freeze?
Remove the top on Jandy valves, check valves, or other valves. If necessary, open the valves so water can move down the pipe. Put empty plastic gallon jugs in your pool to take up ice expansion and protect your pool tiles or finish from freezing weather.
Will pipes freeze at 31 degrees?
Pipes can freeze at 32 degrees or below, but it will take a sustained period of time for this to happen. In other words, a pipe needs to be at freezing temperatures for at least half a day before homeowners have to worry about any freezing occurring.
Is it OK to run pool pump 24 hours a day?
The size of your pool, the efficiency of your pump and filter, and how dirty your pool is are just some of the factors you need to consider. Nevertheless, most pool cleaning professionals would advise against running a pool pump for more than 8 hours a day.
Should I turn on pool heater to keep from freezing?
It’s important to remember that you don’t need to run your heater to prevent your pool water from freezing. In fact, running your heater in freezing conditions can cause substantial damage to the unit. If your pool has ice on its surface, break it up so that the skimmers and skimmer doors are kept clear.
Can u leave a Intex pool up in winter?
Leaving your Intex pool out in colder temperatures can completely rupture your pool lining. That’s a mess you don’t want to clean up or repair. … This is why the Intex pools manufacturer strongly recommends draining and disassembling your pool if the temperatures in your area drop to or below 41°F (5°C).
Should you cover pool equipment during a freeze?
If you don’t have a water timer or refill mechanism, make sure your pool stays full because your equipment can freeze if air gets through the skimmers and into the system. 4. DO NOT cover your pool heater with insulation or a blanket.
Should you let your water drip to prevent freezing?
Let the cold water drip from a faucet served by exposed pipes. Running water through the pipe—even at a trickle—helps prevent pipes from freezing. Keep the thermostat set to the same temperature during day and night. … Insulation will maintain higher temperatures in those areas.
What is considered a hard freeze?
Hard freeze occurs when the temperature reaches 28°-or-lower for at least a few hours. It usually means that many types of plants and most seasonal vegetation will be destroyed.
Should I turn off the water if my pipes are frozen?
Thaw Frozen Pipes But if they have running water, it’s likely your pipes have frozen. Turn off the water immediately at the main shut off valve. Open the faucet so that water will flow through the pipe once the area is melted. This will help melt more ice.
Can I leave my pool pump off for a week?
Yes you can turn your pool pump off for a week. You can turn it off for a month, but there are consequences. The pool will get dirty—no pump, no filtering. The chemicals will not circulate and the water could start turning a nice shade of green as algae forms.
Is it better to run pool pump at night?
It’s always best to run the pool pump during the hottest times of the day. The sun is one of the causes of chlorine depletion in your pool. … If you run your pump during the night, then the sun has all day to attack the chlorine that’s standing still in your pool. That can cause algae fast!
Should you cover pool when raining?
When preparing your pool for a storm, leave it uncovered. Installing any kind of cover across the pool will not do much to protect against dust and contaminants because storms often bring strong winds and heavy rain that can cause the cover to lift off your pool.