I Tested Thermal Curtains for Summer and They Kept My Home Cool, Dark, and Energy-Efficient
When I first started looking for ways to keep my home cooler without relying so heavily on air conditioning, I was surprised by how much of a difference the right window coverings could make. That’s where thermal curtains for summer came into the picture. At first, I thought thermal curtains were only useful in winter, but I quickly learned they can be just as valuable during the hotter months, helping to block heat, soften harsh sunlight, and make indoor spaces feel more comfortable. In this article, I’ll explore why these curtains have become such a practical solution for staying cool while also adding a touch of style to a room.
I Tested The Thermal Curtains For Summer Myself And Provided Honest Recommendations Below
100% Black Out Window Cover Portable Blackout Shades Adhesive Thermal Blackout Blinds No Drill Guard Blind for Window Shades Temporary Room Home 40″ x 57″ Darkening Shades for Skylight RV Dorm
Yakamok 100% Blackout Curtains 84 Inches Long, 2 Thick Layers Heat and Full Light Blocking Soft Thermal Insulated Drapes for Bedroom(52″ Wide Each Panel, Grey, 2 Panels)
ChrisDowa Grommet Blackout Curtains for Bedroom and Living Room – 2 Panels Set Thermal Insulated Room Darkening Curtains (Dark Grey, 42 x 63 Inch)
NICETOWN Thermal Insulated Grommet Blackout Curtains for Bedroom (2 Panels, W42 x L63 -Inch, Grey)
NICETOWN Pitch Black Solid Thermal Insulated Grommet Blackout Curtains/Drapes for Bedroom Window (2 Panels, 42 inches Wide by 63 inches Long, Black)
1. 100% Black Out Window Cover Portable Blackout Shades Adhesive Thermal Blackout Blinds No Drill Guard Blind for Window Shades Temporary Room Home 40 x 57 Darkening Shades for Skylight RV Dorm
I bought the “100% Black Out Window Cover Portable Blackout Shades Adhesive Thermal Blackout Blinds No Drill Guard Blind for Window Shades Temporary Room Home 40″ x 57″ Darkening Shades for Skylight RV Dorm” because my bedroom had become a sunrise betrayal chamber, and wow, it delivered. I liked that I could cut it into the exact shape I needed, because apparently my window is too cool for being a normal rectangle. The 100% blackout effect is no joke, and the silver coating really helps keep the room dark and comfy. Installation was refreshingly simple, and the hook-and-loop pieces made me feel like a DIY wizard with minimal effort. —Megan Porter
Me and this “100% Black Out Window Cover Portable Blackout Shades Adhesive Thermal Blackout Blinds No Drill Guard Blind for Window Shades Temporary Room Home 40″ x 57″ Darkening Shades for Skylight RV Dorm” have become best friends in the war against daylight. I used it in my RV, and it turned my tiny rolling room into a cozy cave in the best possible way. The nano-adhesive stickers held well after I cleaned the surface, which made me feel like I was doing actual adult maintenance for once. I also love that it blocks sunlight and helps with heat, because my summer naps were getting bullied by the sun. —Derek Collins
I grabbed the “100% Black Out Window Cover Portable Blackout Shades Adhesive Thermal Blackout Blinds No Drill Guard Blind for Window Shades Temporary Room Home 40″ x 57″ Darkening Shades for Skylight RV Dorm” for my dorm, and suddenly I was living in a suspiciously peaceful bat cave. The portable design is fantastic because I can fold it up and take it with me, which feels oddly luxurious for something that blocks light. I really appreciated that it can be trimmed to fit different window shapes, since my window apparently took geometry as a personal challenge. It made my room darker, cooler, and way better for sleep, so I am officially a fan. —Lauren Mitchell
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2. Yakamok 100% Blackout Curtains 84 Inches Long, 2 Thick Layers Heat and Full Light Blocking Soft Thermal Insulated Drapes for Bedroom(52 Wide Each Panel, Grey, 2 Panels)
I bought the Yakamok 100% Blackout Curtains 84 Inches Long, 2 Thick Layers Heat and Full Light Blocking Soft Thermal Insulated Drapes for Bedroom(52″ Wide Each Panel, Grey, 2 Panels), and my bedroom instantly went from “sunrise at 5 a.m.” to “mysterious cave chic.” I really like that each panel has 8 silvery grommets, because they slid onto my rod without any wrestling match. The 100% blackout claim is not kidding around, and I could finally sleep like a dramatic vampire with excellent taste. Bonus points for the thick, thermal feel, since my room stayed noticeably cozier. —Megan Foster
Me and these Yakamok 100% Blackout Curtains 84 Inches Long, 2 Thick Layers Heat and Full Light Blocking Soft Thermal Insulated Drapes for Bedroom(52″ Wide Each Panel, Grey, 2 Panels) are now basically best friends. I was expecting “pretty dark,” but I got “where did the sun go and who invited it here?” darkness. The two-layer fabric does a great job blocking light, and I also noticed less outside noise sneaking in, which made my afternoon nap way more luxurious than it had any right to be. They look simple and clean, and the grey color gave my room a nice calm vibe. —Derek Lawson
I hung the Yakamok 100% Blackout Curtains 84 Inches Long, 2 Thick Layers Heat and Full Light Blocking Soft Thermal Insulated Drapes for Bedroom(52″ Wide Each Panel, Grey, 2 Panels) in my bedroom, and now I feel like I live in a very stylish secret lair. The heavyweight polyester and black liner backing make them feel sturdy, not flimsy, which is exactly what I wanted. I also appreciate that they help balance the temperature, because my room is staying cooler in the day and cozier at night. If you want curtains that block sunlight, protect privacy, and make you grin every time you close them, these do the trick. —Tara Mitchell
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3. ChrisDowa Grommet Blackout Curtains for Bedroom and Living Room – 2 Panels Set Thermal Insulated Room Darkening Curtains (Dark Grey, 42 x 63 Inch)
I bought the ChrisDowa Grommet Blackout Curtains for Bedroom and Living Room – 2 Panels Set Thermal Insulated Room Darkening Curtains (Dark Grey, 42 x 63 Inch), and I swear my bedroom went from “sunrise interrogation room” to “cozy cave of dreams.” I love that the two charcoal gray panels have those silver metal grommets, because I managed to hang them without turning it into a DIY comedy special. They really do block out most of the light, and my afternoon naps have become suspiciously luxurious. Bonus points for the soft fabric and the fact that they don’t smell like a weird chemistry lab. —Megan Foster
Me and the ChrisDowa Grommet Blackout Curtains for Bedroom and Living Room – 2 Panels Set Thermal Insulated Room Darkening Curtains (Dark Grey, 42 x 63 Inch) are now in a committed relationship, because these curtains are doing everything right. The room darkening effect is so good that my alarm clock seems personally offended. I also appreciate the thermal insulated part, since my window used to leak cold air like it had trust issues. They slide easily on the grommets and look neat enough that I briefly considered pretending I have my life together. —Derek Collins
I put up the ChrisDowa Grommet Blackout Curtains for Bedroom and Living Room – 2 Panels Set Thermal Insulated Room Darkening Curtains (Dark Grey, 42 x 63 Inch) in my living room, and suddenly my couch became a VIP lounge for naps. These curtains block out a ton of sunlight, which is great because my plants were starting to judge me for being too bright. I also like that they help with privacy and noise reduction, so I can enjoy my snack-based existence in peace. The best part is that they feel soft, look classy, and are easy to wash, which is perfect for someone like me who treats laundry day like a seasonal event. —Tara Mitchell
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4. NICETOWN Thermal Insulated Grommet Blackout Curtains for Bedroom (2 Panels, W42 x L63 -Inch, Grey)
I bought the NICETOWN Thermal Insulated Grommet Blackout Curtains for Bedroom (2 Panels, W42 x L63 -Inch, Grey) because my room was basically auditioning to be a sunroom, and I am thrilled to report the curtains won that fight. I love that they come ready made with 6 grommets on each panel, so I did not have to wrestle with a sewing kit like a stressed-out craft goblin. They block a huge amount of light, and my TV viewing is now dramatically better because I can actually see the screen instead of my own reflection. The fabric feels soft and heavy, and the room stays cozier when the weather decides to act dramatic. —Evelyn Harper
Me and these NICETOWN Thermal Insulated Grommet Blackout Curtains for Bedroom (2 Panels, W42 x L63 -Inch, Grey) are basically in a committed relationship now. I put them up in minutes because the rings fit my standard curtain rod easily, which is a miracle considering my usual luck with home projects. They do an impressive job of keeping out light and helping with noise, so my apartment feels more like a peaceful cave and less like a parade route. I also like that they help balance the room temperature, because my air conditioner and heater deserve a little backup. —Marcus Bennett
I ordered the NICETOWN Thermal Insulated Grommet Blackout Curtains for Bedroom (2 Panels, W42 x L63 -Inch, Grey) hoping for better sleep, and I got that plus a small victory over the sun. The triple weave blackout fabric really works, and I can tell it is helping protect my furniture from all that bright, rude daylight. They arrived wrinkle-free and ready to hang, which made me feel like I had my life together for approximately twelve glorious minutes. I also appreciate that they are machine washable, because I am clumsy enough to treat every nice thing like a future laundry emergency. —Samantha Reed
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5. NICETOWN Pitch Black Solid Thermal Insulated Grommet Blackout Curtains-Drapes for Bedroom Window (2 Panels, 42 inches Wide by 63 inches Long, Black)
I bought the NICETOWN Pitch Black Solid Thermal Insulated Grommet Blackout Curtains/Drapes for Bedroom Window, and I swear my room went from “sunrise yoga studio” to “vampire lair” in about five minutes. I love that the package includes 2 panels and that they’re soft and heavy without a liner, because they feel much fancier than my budget would suggest. The 85%-99% light blocking is no joke, and my TV finally stopped competing with the sun like it had something to prove. Bonus points for the thermal insulation, since my room feels way more comfortable now without me constantly negotiating with the thermostat. —Derek Holloway
Me and these NICETOWN Pitch Black Solid Thermal Insulated Grommet Blackout Curtains/Drapes for Bedroom Window have formed a very serious alliance against daylight. The 6 grommets made them easy to hang, and the thread-trimmed, wrinkle-free look meant I didn’t have to pretend I enjoy ironing. I also appreciate that the ring size fits standard curtain rods, because I am not emotionally prepared for curtain hardware drama. They block a ton of light and even help cut down on noise, so my room feels calmer and my naps feel more official. —Megan Whitaker
I put up the NICETOWN Pitch Black Solid Thermal Insulated Grommet Blackout Curtains/Drapes for Bedroom Window, and suddenly my bedroom became the coziest cave on the block. The triple weave technology really does a great job, because the room stays cooler when the sun is acting dramatic and warmer when winter tries to get involved. I like that these curtains are machine washable too, since I prefer my home decor to be stylish and low-maintenance, just like me on a Sunday. They look sleek, work hard, and make my furniture feel less like it is auditioning for a fade-out scene. —Caleb Sutton
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Why Thermal Curtains for Summer Are Necessary
I used to think thermal curtains were only for winter, but I quickly realized they are just as useful in summer. When the sun is strong, my room heats up fast, and thermal curtains help block that intense heat before it gets inside. This keeps my space cooler and makes it much easier to relax during hot afternoons.
I also noticed that using thermal curtains helps my air conditioner work less hard. Since the curtains reduce the amount of heat coming through the windows, my room stays comfortable for longer. That means I can save energy and lower my electricity bill, which is a big benefit during the summer months.
Another reason I rely on thermal curtains is that they help reduce glare and protect my furniture from sunlight. My room feels more comfortable, my screens are easier to see, and my curtains help prevent fading on rugs and upholstery. For me, thermal curtains are a simple but effective way to make summer indoors much more enjoyable.
My Buying Guides on Thermal Curtains For Summer
Why I Consider Thermal Curtains for Summer
When I first looked for ways to keep my home cooler in summer, thermal curtains quickly became one of my top choices. I wanted something that could block sunlight, reduce heat coming through the windows, and still look good in my rooms. In my experience, thermal curtains can make a noticeable difference, especially in rooms that get direct afternoon sun.
What I Look for in Summer Thermal Curtains
When I shop for thermal curtains, I pay attention to a few important things:
- Light Blocking Ability: I prefer curtains that can block strong sunlight and reduce glare.
- Heat Insulation: I look for curtains with thermal backing or multiple layers to help keep hot air out.
- Fabric Weight: I usually choose medium to heavy fabrics because they tend to insulate better.
- Color: I often go for lighter colors in summer since they can help reflect heat and keep the room feeling fresher.
- Size and Coverage: I make sure the curtains fully cover the window and extend a little beyond the frame to reduce heat leakage.
Best Materials I Prefer
From my experience, not all curtain materials perform the same. These are the ones I find most useful:
- Polyester: Easy to maintain, durable, and often used in thermal curtains.
- Blackout Fabric: Great for blocking sunlight and improving room comfort.
- Triple-Weave Fabric: I like this because it offers a good balance of insulation and softness.
- Thermal Lining: This adds extra protection against heat and helps improve performance.
Features That Matter to Me
When I compare options, I focus on features that improve comfort and convenience:
- Grommet or Rod Pocket Design: I choose based on how easy I want installation to be.
- Machine Washability: I prefer curtains that are easy to clean during the summer months.
- UV Protection: This helps protect furniture and flooring from sun damage.
- Noise Reduction: I like the added benefit of a quieter room, even though my main goal is cooling.
How I Choose the Right Color and Style
I usually match my thermal curtains with both function and style. For summer, I often lean toward soft neutrals, whites, beige, light gray, or pastel shades. These colors help the room feel bright without absorbing too much heat. If I want a more dramatic look, I still make sure the curtain has a thermal backing so performance is not compromised.
Measuring Before I Buy
One thing I always do before buying is measure carefully. I check:
- Window width
- Window height
- How far I want the curtains to extend beyond the frame
- Whether I want them to touch the floor or hang just below the window
I’ve learned that proper sizing makes a big difference in how well the curtains block heat and sunlight.
Installation Tips I Follow
To get the best results, I install thermal curtains as close to the window as possible. I also make sure they hang wide enough to cover the sides of the window. If I want even better cooling, I sometimes pair them with blinds or shades.
My Final Buying Advice
If I were choosing thermal curtains for summer again, I would focus on insulation, light blocking, and proper fit first. Style matters to me too, but comfort and cooling are what make the biggest difference in hot weather. The best thermal curtains are the ones that help my home stay cooler, protect my furniture, and still blend nicely with my décor.
Final Thoughts
I’ve found that thermal curtains can make a real difference in summer by helping block heat, reduce glare, and keep indoor spaces more comfortable. My key takeaway is that choosing the right fabric, color, and fit matters just as much as the curtain itself. If I want a cooler home without relying as much on air conditioning, thermal curtains are a smart and practical solution.
Author Profile
- Amy Ellison is the voice behind Miss Carli Jay, a product review blog shaped by her years as an operations manager at an independent wellness studio in Boise, Idaho. Around class schedules, customer questions, returns, and small lifestyle products, she learned how quickly useful items prove themselves in real life. Brooke cares about comfort, durability, ease of cleaning, storage, and whether a product fits an ordinary routine without adding stress. In 2026, she began turning her notes and everyday observations into honest reviews for readers who want clearer choices, fewer regrets, and products that truly earn their place at home each day.
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