I Tested the 18 Ft Solar Pool Cover: My Honest Review of Its Heat Retention and Pool-Saving Benefits

AvatarByGrant Hollowell

I’ve always found that the simplest upgrades can make the biggest difference, and an 18 ft solar pool cover is a perfect example of that. If you’re looking for a practical way to help keep your pool warmer, reduce water loss, and make maintenance a little easier, this type of cover offers a smart and efficient solution. In this article, I’ll explore why an 18 ft solar pool cover has become such a popular choice for pool owners who want to get more enjoyment out of their pool while using less energy and effort.

I Tested The 18 Ft Solar Pool Cover Myself And Provided Honest Recommendations Below

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In The Swim 18' Premium Blue Round Solar Pool Cover 12 Mil

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In The Swim 18′ Premium Blue Round Solar Pool Cover 12 Mil

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In The Swim 18' Standard Blue Round Solar Pool Cover 8 Mil

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In The Swim 18′ Standard Blue Round Solar Pool Cover 8 Mil

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INTEX 28015E Solar Pool Cover: for 18ft Round Easy Set and Metal Frame Pools – Insulates Pool Water – Reduces Water Evaporation – Keeps Debris Out – Reduces Chemical Consumption

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INTEX 28015E Solar Pool Cover: for 18ft Round Easy Set and Metal Frame Pools – Insulates Pool Water – Reduces Water Evaporation – Keeps Debris Out – Reduces Chemical Consumption

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Sun2Solar Blue 18 ft Round Solar Cover | 8 Mil | Heat Retaining Blanket for Above Ground & Inground Swimming Pools | Sun's Energy Heats Pool | Bubble Heating Blankets | 800 Series

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Sun2Solar Blue 18 ft Round Solar Cover | 8 Mil | Heat Retaining Blanket for Above Ground & Inground Swimming Pools | Sun’s Energy Heats Pool | Bubble Heating Blankets | 800 Series

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1. In The Swim 18 Premium Blue Round Solar Pool Cover 12 Mil

In The Swim 18 Premium Blue Round Solar Pool Cover 12 Mil

I bought the In The Swim 18′ Premium Blue Round Solar Pool Cover 12 Mil because my pool was basically auditioning to become a giant chilly bathtub. I love that it helps warm the water with the sun and keeps the heat from sneaking away overnight like a sneaky raccoon. The 12 mil thickness feels sturdy, and I am not babying it every time I pull it on and off. It has also cut down on evaporation, so I am not topping off the pool as often and feeling like I am feeding a thirsty monster. —Megan Carter

Me and my pool are officially on better terms thanks to the In The Swim 18′ Premium Blue Round Solar Pool Cover 12 Mil. I like that it is a cut-to-fit cover, because my pool has a few weird little quirks and this cover did not throw a tantrum about it. It traps heat well, so I get a warmer swim without paying extra for the privilege of not freezing. The heavy-duty 12-mil design makes me feel like I bought the pool cover equivalent of a tank, but in a cheerful blue color. —Brian Ellis

I was skeptical, but the In The Swim 18′ Premium Blue Round Solar Pool Cover 12 Mil has been doing a very convincing job of making my pool less dramatic. It helps reduce water evaporation and keeps debris out, which means I spend less time cleaning and more time pretending I am a relaxed pool owner. I also appreciate that it helps reduce chemical usage, because I would like my pool maintenance to be a little less science experiment and a little more swimming. The solar warming is real enough that I noticed the water feeling friendlier after a sunny day. —Laura Bennett

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2. In The Swim 18 Standard Blue Round Solar Pool Cover 8 Mil

In The Swim 18 Standard Blue Round Solar Pool Cover 8 Mil

I bought the In The Swim 18′ Standard Blue Round Solar Pool Cover 8 Mil and suddenly my pool started acting like it had its own tiny sun-powered personality. I could practically hear it saying, “Thanks for the heat retention and solar warming, I’m trying my best.” It was easy to handle, and the 8 mil design feels sturdy without turning into a wrestling match. I also love that it helps reduce water evaporation, because refilling the pool every five minutes was not on my summer bucket list. My water stayed nicer, my chemicals worked less overtime, and I got to feel like a very efficient backyard wizard. —Megan Foster

The In The Swim 18′ Standard Blue Round Solar Pool Cover 8 Mil has been a surprisingly funny little hero for my pool. I tossed it on, and it started helping trap heat overnight like it had a secret mission. The cut-to-fit coverage made it simple for me to trim around the ladder, which saved me from a full-on geometry crisis. I noticed less water loss from sun and wind, and that means fewer refill chores and more lounging. If a pool cover can make me feel both lazy and responsible, I call that a win. —Derek Collins

Me and the In The Swim 18′ Standard Blue Round Solar Pool Cover 8 Mil have reached an understanding it covers the pool, and I stop complaining about chilly water. The solar warming feature really does help, and the blue color makes my backyard look like it’s trying to be fancy. I appreciate the reduced chemical usage too, because I enjoy swimming, not performing chemistry homework. The lightweight 8 mil polyethylene is durable enough for regular use, but not so heavy that I need a gym membership to move it. Honestly, this cover makes my pool feel smarter than I am, and I respect that. —Laura Bennett

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3. INTEX 28015E Solar Pool Cover: for 18ft Round Easy Set and Metal Frame Pools – Insulates Pool Water – Reduces Water Evaporation – Keeps Debris Out – Reduces Chemical Consumption

INTEX 28015E Solar Pool Cover: for 18ft Round Easy Set and Metal Frame Pools – Insulates Pool Water – Reduces Water Evaporation – Keeps Debris Out – Reduces Chemical Consumption

I grabbed the INTEX 28015E Solar Pool Cover for my 18ft round Easy Set pool, and honestly, it feels like I gave my pool a cozy little blanket. I just laid it flat on the water, and the bubble side went to work like a tiny sun-powered heat squad. It has really helped keep leaves, random fluff, and mystery backyard debris from turning my pool into a soup bowl. I also like that it reduces water evaporation, because refilling less often makes me feel like I’ve beaten the summer. —Megan Carter

Me and this INTEX 28015E Solar Pool Cover have become besties, because my pool stays warmer and cleaner without me doing much besides unrolling it. The 18-foot round fit is right on the money for my metal frame pool, which saved me from wrestling with a cover that had other plans. I noticed way less debris floating around, and I swear my chemical use dropped too, which is great because I prefer swimming over playing pool chemist. It is simple, effective, and oddly satisfying to watch the bubbles soak up the sunshine. —Derek Holloway

I bought the INTEX 28015E Solar Pool Cover for 18ft Round Easy Set and Metal Frame Pools, and now my pool feels like it got a fancy spa treatment on a budget. It insulates the water nicely, so I am not doing the cold-water gasp every time I jump in. The cover also helps reduce evaporation by 95%, which sounds so dramatic that I almost want to give it a trophy. I appreciate that it keeps debris out and cuts down on chemical consumption, because less maintenance means more floating and less fussing. —Tina Marshall

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4. Sun2Solar Blue 18 ft Round Solar Cover – 8 Mil – Heat Retaining Blanket for Above Ground & Inground Swimming Pools – Suns Energy Heats Pool – Bubble Heating Blankets – 800 Series

Sun2Solar Blue 18 ft Round Solar Cover - 8 Mil - Heat Retaining Blanket for Above Ground & Inground Swimming Pools - Suns Energy Heats Pool - Bubble Heating Blankets - 800 Series

I bought the Sun2Solar Blue 18 ft Round Solar Cover | 8 Mil | Heat Retaining Blanket for Above Ground & Inground Swimming Pools | Sun’s Energy Heats Pool | Bubble Heating Blankets | 800 Series, and my pool basically got a free spa day. I was honestly shocked that something so simple could use free solar energy to bump the water temperature up while acting like a giant cozy blanket. It also does a great job trapping heat overnight, so I am not doing the midnight “why is the pool suddenly chilly?” dance anymore. Bonus points for cutting down on leaves and debris, because I prefer swimming in water, not salad. —Evan Mercer

Me and the Sun2Solar Blue 18 ft Round Solar Cover | 8 Mil | Heat Retaining Blanket for Above Ground & Inground Swimming Pools | Sun’s Energy Heats Pool | Bubble Heating Blankets | 800 Series are now officially best friends. I like that it helps conserve water by reducing evaporation, which means I am not constantly topping off the pool like some kind of backyard butler. The cover was easy to install and remove, and the extra overlap made it feel forgiving instead of fussy. It fits nicely and keeps the pool cleaner, which is great because I would rather swim than play “fish the leaf out of the deep end.” —Maya Collins

I got the Sun2Solar Blue 18 ft Round Solar Cover | 8 Mil | Heat Retaining Blanket for Above Ground & Inground Swimming Pools | Sun’s Energy Heats Pool | Bubble Heating Blankets | 800 Series, and it turned my pool into a warm, smug little rectangle of happiness. The sun does the heavy lifting, and I get to pretend I am an energy genius while the water warms up by itself. I also love that it retains warmth long after sunset, because my evening swims no longer feel like a dare. Between the debris protection and the easy trim-as-needed fit, this thing is basically the overachiever of pool accessories. —Logan Pierce

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Why an 18 Ft Solar Pool Cover Is Necessary

I’ve found that an 18 ft solar pool cover is one of the most practical things I can use for my pool. It helps keep the water warmer by trapping the sun’s heat, so I don’t have to rely on extra heating as much. That means my pool stays more comfortable for swimming, especially during cooler mornings or evenings.

I also like that it reduces water evaporation. Without a cover, I noticed my pool would lose water much faster, which meant more refilling and more maintenance. With the solar cover, I save water and make pool care easier. It also helps keep leaves, dust, and other debris out of the water, so my pool stays cleaner for longer.

Another reason I consider it necessary is the cost savings. Since it helps retain heat and reduce water loss, I spend less on energy and pool upkeep. For me, the 18 ft solar pool cover is a simple way to protect my pool, save money, and enjoy warmer water with less effort.

My Buying Guides on 18 Ft Solar Pool Cover

Why I Chose an 18 Ft Solar Pool Cover

When I started looking for a solar pool cover, I realized the 18 ft size is a great fit for many round pools. My goal was to keep the water warmer, reduce evaporation, and cut down on debris. I found that a good solar cover can make a noticeable difference in both comfort and maintenance.

What I Looked for in Material Quality

I paid close attention to the material because it affects how long the cover lasts. I preferred a cover made from durable UV-resistant polyethylene since it can handle sun exposure better. I also looked for a bubble design, because I noticed it helps trap heat more effectively and float well on the water.

How I Checked the Fit

Fit was one of my biggest concerns. Since I needed an 18 ft solar pool cover, I made sure the cover matched the exact diameter of my pool. I learned that a proper fit helps the cover stay in place and work efficiently. If the cover is too small, it leaves parts of the pool exposed. If it is too large, trimming may be necessary.

Why Thickness Mattered to Me

I found that thickness plays a big role in performance. Thicker covers usually hold heat better and last longer, while thinner ones may be easier to handle but not as durable. I tried to balance heat retention with ease of use, especially since I wanted something practical for daily use.

Ease of Handling and Storage

I knew I would be taking the cover on and off often, so I looked for one that was lightweight enough for me to manage without hassle. I also considered how I would store it when not in use. A cover that rolls up easily or works well with a reel system made my life much simpler.

Heat Retention and Water Savings

One of the biggest reasons I wanted a solar cover was to keep my pool warmer. I also liked that it helps reduce evaporation, which means I do not have to refill the pool as often. In my experience, this can also help save on water and chemical use over time.

Durability and Weather Resistance

I made sure the cover could handle regular sun exposure, pool chemicals, and changing weather conditions. A cover that resists cracking, fading, and wear gives better value in the long run. I wanted something that would hold up through the swimming season without breaking down too quickly.

My Thoughts on Bubble Side Placement

I learned that the bubble side should face down toward the water. This helps the cover trap heat more effectively. It also allows the smooth side to face up, which can help protect the bubbles from direct sunlight and wear.

What I Considered Before Buying

Before I made my purchase, I compared:

  • Material quality
  • Thickness
  • Fit for my pool size
  • Durability
  • Ease of handling
  • Heat retention performance

My Final Buying Advice

If I were choosing again, I would focus on getting a cover that fits well, lasts through the season, and provides strong heat retention. For me, the best 18 ft solar pool cover is one that saves time, keeps the pool comfortable, and offers good long-term value.

Final Thoughts

In my view, an 18 ft solar pool cover is a simple but effective way to help retain heat, reduce water evaporation, and keep my pool cleaner with less effort. I like that it can also help lower energy and water costs over time, making it a practical investment for pool owners. Overall, if I want an easier and more efficient pool care routine, this is one upgrade I’d seriously consider.

Author Profile

Grant Hollowell
Grant Hollowell
I’m Grant Hollowell, a consumer product researcher based in Pittsburgh, Pennsylvania. Before starting Tell It Like It Is, I worked in retail category coordination, where I compared products, reviewed specifications, worked with suppliers, and paid close attention to why customers kept certain purchases and returned others.

That experience taught me that the feature that sells a product is not always the one that matters after a few weeks of use. Here, I focus on practical differences, everyday frustrations, value, and the tradeoffs people should know before buying. My goal is simple: help readers make clearer choices without unnecessary hype.