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Extend Your Pool Season into September

Aug 29
4 min read
Bright orange plastic chair sits by a backyard pool, with blurred wooden fence and green trees in the background.

Keep your pool warm for Labor Day and enjoy more weeks of comfortable swimming


You invested a lot in your pool. Why stop enjoying it when there are still beautiful days ahead?


September often brings some of the best weather of the year. The extreme summer heat begins to ease, humidity drops, and afternoons are comfortable enough to spend hours outside. The sun is still strong, too. The biggest change is what happens after the sun goes down.


As overnight temperatures cool, your pool loses heat faster than it did in July and early August. By morning, the water may feel just chilly enough that you think pool season is over. But, it doesn't have to be.


With the right solar pool heating setup, you can replace much of the heat your pool loses overnight, enjoy Labor Day weekend in the pool, and keep swimming well into September.


September Is Still Pool Weather

Red maple leaf floating on bright turquoise water with rippling light patterns.

Many people think Labor Day signals the end of pool season simply because it's September. In reality, the weather often says otherwise. Across much of the country, September afternoons are still warm and sunny. It's the perfect time to relax by the pool, invite friends over, or spend the weekend with family.


The only thing working against you is cooler nights. Every night your pool gives off heat to the cooler air. By the next morning, the water starts at a lower temperature than it did the day before. Even after several hours of sunshine, it may not recover all the heat it lost overnight.


Over time, those small temperature losses add up until the water no longer feels as comfortable.

Black pool hose coils on the deck and drops into a blue swimming pool, with Beluga Gen2 a steady trickle of warm water flows, and a sunny backyard scene.

Put the Sun to Work


The good news is that September sunshine still provides plenty of free energy. The Beluga Gen2 captures that energy by circulating water through a length of black hose that's warmed by the sun. As the water travels through the hose, it absorbs heat before returning to your pool.


It's a simple idea, but it's an effective one. Instead of trying to dramatically heat the water all at once, the Beluga gradually replaces the heat your pool naturally loses each night. Day after day, those extra degrees help keep your pool comfortable without relying on expensive gas or electric heaters.


A Few Degrees Make a Big Difference


Many pool owners think they need water that's ten degrees warmer to keep swimming. That's usually not the case.


Often, just a few extra degrees are enough to change how the water feels. A pool that's 82 degrees can feel much more inviting than one that's 78 or 79 degrees, especially by afternoon or later in the evening.


Those small temperature gains are often the difference between jumping in and deciding to stay on the deck.


Woman in a straw hat grills sausages by a backyard pool while kids float nearby on a blue raft.

Enjoy Labor Day Instead of Closing the Pool


Labor Day is one of the last long weekends before fall schedules take over. It's also one of the best opportunities to enjoy your backyard.


Instead of spending the weekend thinking about closing the pool, imagine one more barbecue, one more afternoon floating in the water, or one more evening swim with family and friends.


If the weather is still beautiful, why let cooler water keep you from enjoying it? Maintaining a comfortable pool temperature helps you get more out of one of the best weekends of the season.


Get More from Your Pool Investment


A backyard pool is a significant investment. Every extra week you can comfortably use it adds value to that investment.


Solar pool heating gives you the opportunity to enjoy your pool longer without adding high monthly energy costs. By making better use of the sunshine that's still available, you're extending your season with free energy that's already there.


Instead of wondering whether the water will be warm enough, you'll have more opportunities to swim, relax, entertain, and enjoy the backyard you've worked hard to create.


Tips for Keeping Your Pool Warmer in September


A few simple steps can help you get the most from your Beluga and your pool during late summer.


  • Use black rubber hose for the best heat absorption.

  • Place the hose on concrete, asphalt, or another dark surface that collects heat from the sun.

  • Adjust your water flow so it isn't moving too quickly through the hose.

  • Run your filtration system during the sunniest part of the day.

  • Use a solar blanket overnight whenever possible to reduce heat loss and help hold onto the warmth you've collected during the day.


These small adjustments can make a noticeable difference in how comfortable your pool stays throughout September.

September 2026 calendar with autumn leaves, and Sep 12 circled as Pool Day with a smiling sun.

Don't Let the Calendar Decide


Many pool owners close their pools simply because Labor Day has passed. In reality, the swimming season often has several good weeks left. If the afternoons are still sunny and your pool is staying comfortable, there's no reason to end the season early.


The Beluga Gen2 helps you capture free solar energy, replace the heat your pool loses overnight, and enjoy more time in the water without expensive heating bills.


This September, don't let the calendar decide when pool season ends. Make the most of every sunny day, celebrate Labor Day in the pool, and enjoy the extra weeks still swimming.



 
 
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