If there’s one pool setting homeowners tend to underestimate, it’s pump runtime.
We’ve come across pools in the middle of a St. George summer with the pump scheduled to run for just two or three hours a day. While that might sound like a good way to save on electricity, for many pools here, it’s simply not enough circulation during our hottest months.
Your pool pump plays a huge role in keeping your water clean, circulating chemicals, filtering out debris, and preventing algae. And just like the rest of your pool maintenance, how long it needs to run changes throughout the year.
So, how long should you run your pool pump in St. George, UT?
Here’s a general seasonal guide.
Summer: Around 10–12 Hours Per Day
Summer is when your pool is working the hardest.
St. George regularly sees triple-digit temperatures, intense sunshine, more frequent swimming, and plenty of wind and dust. All of that puts additional demand on your pool’s filtration and sanitation systems.
For many of the residential pools we service, we recommend running the pump for roughly 10–12 hours per day during the summer.
If you’re currently running yours for only two or three hours a day, that’s likely worth revisiting.
Without enough circulation, your pool may struggle with:
- Algae growth
- Cloudy water
- Uneven chemical distribution
- Debris that isn’t being properly filtered
- Poor skimming
- Difficulty maintaining chlorine levels
If your pool uses a salt chlorine generator, pump runtime is especially important because the system generally only produces chlorine while water is flowing through it.
That said, every pool is different. A variable-speed pump running longer at a lower speed is very different from a single-speed pump running at full power. Pool size, equipment, usage, and water chemistry all need to be considered when setting the right schedule.
Fall: Around 6–8 Hours Per Day
Once St. George starts cooling down, your pool generally doesn’t need the same schedule it did in July.
For many pools, around 6–8 hours per day can be a reasonable starting point during fall.
Don’t cut the runtime too aggressively, though.
We’re still dealing with warm afternoons, sunshine, wind, leaves, and plenty of debris during a Southern Utah fall. Your pool still needs enough circulation to filter the water and distribute chemicals properly.
Fall is a good time to gradually adjust your schedule as temperatures and pool usage decrease rather than suddenly dropping from a summer schedule to just a few hours per day.
Winter: Around 4–6 Hours Per Day
St. George winters are mild compared to most of the country, which means we don’t typically shut our pools down the way homeowners do in colder climates.
For many residential pools, around 4–6 hours of circulation per day may be sufficient during the cooler months.
Your exact schedule will depend on your equipment, water temperature, weather, and whether your pool has features that require additional circulation.
And remember: winter doesn’t mean zero maintenance.
Your pool still needs balanced water, filtration, equipment checks, and regular cleaning even if nobody has gone swimming in weeks.
Spring: Around 6–8 Hours Per Day
Once temperatures start climbing again, it’s time to start increasing your pump runtime.
A general starting point for spring is around 6–8 hours per day, increasing as the weather warms and your family starts using the pool more frequently.
Spring is also a good time to make sure your pump, filter, and other equipment are working properly before the real St. George heat arrives.
You don’t want to discover a circulation problem for the first time when it’s 105 degrees outside and your pool is suddenly turning green.
Why Isn’t There One Perfect Number?
We wish it were as easy as saying, “Every pool pump should run exactly eight hours.”
It isn’t.
Your ideal pump schedule depends on several factors, including:
- Pool size
- Pump size and type
- Pump speed and flow rate
- Filter and plumbing setup
- Water temperature
- Amount of direct sunlight
- How often the pool is used
- Debris around the pool
- Water chemistry
- Whether you use a salt chlorine generator
- Additional water features or equipment
Variable-speed pumps complicate the question even further—in a good way. They can often run for longer periods at lower speeds, providing consistent circulation while using less energy than running at full speed the entire time.
That’s why we look at the individual pool rather than relying solely on a timer.
More Isn’t Always Better, Either
If two hours isn’t enough, should you just run your pump 24/7?
Usually, no.
There are situations where longer runtimes are necessary, but simply running your pump constantly isn’t automatically better. You’re trying to find the right balance between adequate circulation, clean water, proper sanitation, equipment needs, and energy use.
The goal isn’t to run your pump for as few hours as possible.
The goal is to run it long enough to properly take care of your pool.
That’s an important distinction.
Your Pool Will Usually Tell You When Something Isn’t Working
Pay attention to your water.
If your pool is consistently cloudy, algae keeps coming back, chlorine levels are difficult to maintain, or debris isn’t being pulled into the skimmer properly, inadequate circulation could be part of the problem.
Sometimes adjusting the pump schedule helps. Other times, there’s an issue with the filter, pump, water chemistry, or another piece of equipment.
That’s where having someone regularly checking the entire system can make a big difference.
Not Sure How Long Your Pool Pump Should Run?
At Loch Ness Pool Care, we don’t just show up, throw some chemicals in the water, and leave.
We check your chemicals and equipment, net, brush, and vacuum as needed, and keep an eye out for anything that isn’t working the way it should. If we notice an equipment problem or repair that needs attention, we’ll assess it, communicate with you, and get your approval before moving forward.
We’re a locally owned and operated, one-man pool service, so you’ll work directly with the person actually taking care of your pool each week.
And if you’re currently running your pump for two hours a day in July? We might have a conversation about that, too.
Residential pool service starts at just $150 per month.
Give Loch Ness Pool Care a call today for dependable pool maintenance in St. George, UT, and we’ll help make sure your pool—and your pump schedule—are ready for every Southern Utah season.