Most of the time we are more worried about the state of the water in a hot tub than keeping the hot tub water temperature constant. That is one of the more fundamental ways that you can keep your hot tub protected from potential health hazards! That is why I have researched the best way to keep your water protected and found that you can easily do it with a thermal blanket for hot tubs! So here are my top 10 picks for the best thermal blanket for hot tub!
| Image | Product Name | Price On Amazon |
|---|---|---|
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Best Overall Sun2Solar Blue |
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Best for Easy to Install by One Person Solar Sun Rings Solar Cover |
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Best for Heavy-Duty for Longer Service Life Spa Depot Blanket |
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Best for UV Resistant Blue Wav Solar Blanket |
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Best for Heavy-Duty Bubble Pool Hot Tub Evoio Hot Tub Thermal Blanket |
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Best for 5-7 Days of Consistent Sunlight In The Swim Hot Tub Solar Blanket Cover |
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Best for Long Time Warranty In The Swim Solar Blanket Cover |
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Best for Irregular Shape Tub Fatiro Hot Tub Blanket |
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Best for Value of Money & Multi Shape Usage KETNET Solar Cover |
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Best for All Inflatable Round Style Hot Tub MADHOLLY Hot Tub Thermal Blanket |
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1. Best Overall – Sun2Solar Blue 7-Foot-by-7-Foot Square Solar Cover | 800 Series Style
Specification
- Brand: Sun2Solar
- Product Dimension: 84″L x 84″W
- Style: Modern
- Material: Resin
- Shape: Square
Description
Get one of the best overall thermal blankets for your hot tub with the Sun2Solar Blue 7-Foot-by-7-Foot Square Solar Cover!
Features
- Trim to fit: easy to trim the blanket with a pair of scissors
- Bubble wrap design: designed to keep the water in the hot tub warm and ready for you to jump in anytime
- Minimize water evaporation: reduces the amount of water lost while the hot tub is not in use
How to use
When using the Sun2Solar Blue 7-Foot-by-7-Foot Square Solar Cover, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
The Sun2Solar Blue 7-Foot-by-7-Foot Square Solar Cover is one of the best hot tubs covers that I have used in a while! It was great at keeping the heat in the water and keeping the water safe and sound from dirt and falling leaves. I also noticed that the water level did not decrease even after keeping the blanket on for a few nights. It is also very light which might be a problem for pools but it was the perfect size for a 6-man hot tub. It did not budge at all which I really liked! I couldn’t fault it in the 2 weeks that I used it for and had a great experience using it which is why I would consider this to be on the top of my list for the best overall thermal blanket for my hot tub!
Pros and Cons
| Pros | Cons |
| Keeps water well-heated | |
| Little to no drop in the water level | |
| Safe from dirt and debris | |
| Light but still holds in place for hot tubs |
2. Best for Easy to Install by One Person – Solar Sun Rings UV Heating Accessory Circular Heater Solar Cover
Specification
- Brand: Solar Sun Rings
- Product Dimension: 60”W x 2”H
- Style: Modern
- Material: Vinyl
- Shape: Circle
Description
Have an easy time putting on the Solar Sun Rings UV Heating Accessory Circular Heater Solar Cover by just inflating the tube!
Features
- Inflating tube: very easy to use
- Round shape: helps cover one large area
- Compatible with chlorine: is not affected by chemicals in the water
How to use
When using the Solar Sun Rings UV Heating Accessory Circular Heater Solar Cover, you need to make sure that it fits your hot tub precisely. First, you need to inflate the tube and then simply cover the entire hot tub bubble side down. You might need multiple ones to fit your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub. For this one in particular, you might need to reflate the tube in the week.
Expert Verdict
When you have a personal hot tub, the Solar Sun Rings UV Heating Accessory Circular Heater Solar Cover is the perfect thermal blanket for you! It is very easy to install by just one person! All you have to do is inflate the tube and toss it in the hot tub and that is all there is to it. I had recently sanitized my pool and put the cover and checked the water quality and was pleasantly surprised that there were no changes to the water chemistry! My only big gripe with the product is that it is essentially one large tube as a cover. It might be difficult to cover a large hot tub fully because you cannot alter the shape of the product. But it does its job in keeping the water warm evenly, just not full protection if it doesn’t fit exactly for your hot tub.
Pros and Cons
| Pros | Cons |
| Easy to install | Hard to fit multiple ones in the same hot tub |
| Doesn’t affect water chemistry | |
| Keeps water warm |
3. Best for Heavy-Duty for Longer Service Life – Spa Depot Thermo-Float Hot Tub Bubble Cover Floating Spa Blanket
Specification
- Brand: Spa Depot
- Product Dimension: 84″L x 84″W
- Style: Heavy duty
- Material: PVC
- Shape: Square
Description
Get a heavy-duty 16mm thick thermal blanket for yourself with the Spa Depot Thermo-Float Hot Tub Bubble Cover Floating Spa Blanket!
Features
- Heavy duty: won’t budge during high winds
- 16mm: keeps the water safe and evenly warmed
- Long-lasting: lasts a long time
How to use
When using the Spa Depot Thermo-Float Hot Tub Bubble Cover Floating Spa Blanket, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
I have been using the Spa Depot Thermo-Float Hot Tub Bubble Cover Floating Spa Blanket to cover my hot tub for years now! It is a great thermal blanket that keeps the water evenly warmed even when you haven’t taken it off in weeks. It is also very long-lasting so you don’t have to worry about switching to a different brand or buying a new one any time soon either. What I liked most about this thermal blanket is that it didn’t budge even during a windy day and I had not covered the hot tub in my backyard completely! The only problem is that it is quite heavy so you will have a hard time dragging it around and cleaning it every week or so.
Pros and Cons
| Pros | Cons |
| Heavy-duty; won’t move in high winds | Heavy to carry and wash |
| Warms the water evenly | |
| Long-lasting |
4. Best for UV Resistant – Blue Wave NS098 12-mil Solar Blanket for Hot Tubs
Specification
- Brand: Blue Wave
- Product Dimension: 96″L x 84″W
- Style: Custom
- Material: Vinyl
- Shape: Rectangle
Description
Get a thermal blanket that keeps your hot tub protected from UV rays in the summer with the Spa Depot Thermo-Float Hot Tub Bubble Cover Floating Spa Blanket!
Features
- Transparent blue: lets in the sun’s heat and keeps out UV rays
- 95% evaporation reduction: keeps the water level consistent for days
- Temperature raiser: raises the water temperature up to 15°F
How to use
When using the Blue Wave NS098 12-mil Solar Blanket for Hot Tubs, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
UV rays are a killer for your hot tub water quality and you will definitely keep your water protected. The UV rays might react with the chemicals in the hot tub water and cause a reaction that changes the water chemistry altogether! That is why the Spa Depot Thermo-Float Hot Tub Bubble Cover Floating Spa Blanket is so great at keeping your water protected. It not only absorbs the UV rays but lets in natural sunlight which helps to keep the water nice and ready to be jumped in immediately. It was fairly lighter than I expected but it held its own against the wind. However, you might see a seam down the middle of the blanket. It might be an inconvenience for hot tub owners because trimming it down will cause the warranty to be voided (which is there for 90 days).
Pros and Cons
| Pros | Cons |
| Keeps water nice and warm | Seam down the middle; could be an inconvenience for some hot tubs |
| UV protection | |
| Reduced water evaporation even after a few weeks |
5. Best for Heavy-Duty Bubble Pool Hot Tub – Evoio Solar Pool Covers Heavy-Duty Bubble Pool Hot Tub Thermal Blanket
Specification
- Brand: Evoio
- Product Dimension: 72″L x 72″W
- Style: Modern
- Material: PVC
- Shape: Round
Description
Get the heavy-duty bubble thermal blanket for your hot tub with the Evoio Solar Pool Covers Heavy-Duty Bubble Pool Hot Tub Thermal Blanket!
Features
- Varying sizes: comes in different sizes for your need
- Wind resistance: doesn’t get blown off by the wind
How to use
When using the Evoio Solar Pool Covers Heavy-Duty Bubble Pool Hot Tub Thermal Blanket, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
The Evoio Solar Pool Covers Heavy-Duty Bubble Pool Hot Tub Thermal Blanket is a great bubble thermal blanket for your hot tub because it is quite heavy and does not move in strong winds. It is also 15mm which is the perfect thickness to keep your pool protected. For a test, I covered the blanket in a layer of dry leaves, and to my surprise, it did not sink into the pool one bit! It might be thick but it is easy to trim and shape it up for your hot tub. Sadly, it does not hold up all that well against cleaning products like chlorine tablets because it developed holes. So be sure to clear out as much of the cleaning products from your hot tub before putting this cover on.
Pros and Cons
| Pros | Cons |
| Does not move in the wind | Breaks down in chlorine water |
| Able to hold a lot of weight | |
| Easy to trim and shape for your hot tub |
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6. Best for 5-7 Days of Consistent Sunlight – In The Swim 8 x 8 Foot Spa and Hot Tub Solar Blanket Cover
Specification
- Brand: In The Swim
- Product Dimension: 96″L x 96″W x 0.6”H
- Style: Protective
- Material: Polyethylene
- Shape: Square
Description
Be able to use them for a constant week without any worries with the In The Swim 8 x 8 Foot Spa and Hot Tub Solar Blanket Cover!
Features
- Large size: able to fit large hot tubs
- Continuous use: can be kept for 7 days without worry even in harsh and intense sunlight
- Thermal efficiency: keeps the water nicely warmed
How to use
When using the In The Swim 8 x 8 Foot Spa and Hot Tub Solar Blanket Cover, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
The wonderful thermal efficiency of the In The Swim 8 x 8 Foot Spa and Hot Tub Solar Blanket Cover helps keep the water nicely warmed without having to worry about it for a whole week! It can withstand harsh sunlight and will not disintegrate either. It is also a very large size which is perfect to fit large hot tubs. The only problem is that it takes a while for the water to heat up but it does a good job of not losing it once the water is heated.
Pros and Cons
| Pros | Cons |
| Once heated, keeps the water warm for a long time | Takes a while to properly heat the hot tub water |
| Can withstand harsh sunlight | |
| Large size for larger hot tubs |
7. Best for Long Time Warranty – In The Swim Basic Pool Solar Blanket Cover
Specification
- Brand: In The Swim
- Product Dimension: 48″L x 14″W x 0.3”H
- Style: Protective
- Material: Polyethylene
- Shape: Rectangle
Description
Be worry-free with your purchase for up to 3 years after buying the In The Swim Basic Pool Solar Blanket Cover with its great warranty period!
Features
- 3-year warranty: a lasting product that you can always replace with the warranty
- Reduce water chemistry change: does not change the water chemistry
How to use
When using the In The Swim Basic Pool Solar Blanket Cover, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
When you have a product that is ensured for 3 years by the manufacturer, who wouldn’t want the In The Swim Basic Pool Solar Blanket Cover! The only things that you might have a problem with are the sheer weight of the product at over 20 pounds and the inefficient heating of the product. But once you have it down, you can be sure that your water chemistry will have no changes and the water level will be intact as well! Even though it is big and heavy, it was very easy to trim even with a blunt pair of scissors.
Pros and Cons
| Pros | Cons |
| 3-year warranty | Very heavy to carry around |
| Does not affect water chemistry | Takes time to heat the hot tub |
| No changes to the water level | |
| Easy to trim |
8. Best for Irregular Shape Tub – Fatiro Hot Tub Thermal Blanket Bubble Cover Insulation Blanket
Specification
- Brand: Fatiro
- Product Dimension: 94.5″L x 94.5″W
- Style: Thermal
- Material: PVC
- Shape: Square
Description
Get a thermal blanket for your hot tub that can fit irregular shape tubs with the Fatiro Hot Tub Thermal Blanket Bubble Cover Insulation Blanket!
Features
- Easy to fit: can be trimmed and easily fit irregularly shaped hot tubs
- Energy efficiency: keeps costs of energy down during the winter
How to use
When using the Fatiro Hot Tub Thermal Blanket Bubble Cover Insulation Blanket, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
What I liked about the Fatiro Hot Tub Thermal Blanket Bubble Cover Insulation Blanket is that it worked well throughout the winter. I noticed that my energy costs during the winter were getting absurd and had to cover it up to help keep the water warm with this thermal blanket. I was really happy with the results and the reduced costs. But it was so large that it made it easy to fit my irregular hot tub quite easily as well! Not only did it keep the hot tub water warm, but it also prevented it from freezing as well. The downside is that it was thin and light and a good breeze could easily blow it away. That is why I had mine tied down to avoid such an incident.
Pros and Cons
| Pros | Cons |
| Energy efficiency | Very thin and light; can be blown away easily |
| Keeps water warm | |
| Prevents water freezing in winter |
9. Best for Value of Money & Multi Shape Usage – KETNET Solar Pool Cover Irregular Above Ground and In-Ground Pool Solar Cover
Specification
- Brand: KETNET
- Product Dimension: 72″L x 12″W
- Style: Custom
- Material: PVC
- Shape: Round
Description
Get value for your money with a multi-shaping thermal blanket in the KETNET Solar Pool Cover Irregular Above Ground and In-Ground Pool Solar Cover!
Features
- 15mm thick: makes it very durable
- Round shape: can be shaped for different types of hot tub shapes
- Versatility: perfect for in-ground tubs
How to use
When using the KETNET Solar Pool Cover Irregular Above Ground and In-Ground Pool Solar Cover, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
The KETNET Solar Pool Cover Irregular Above Ground and In-Ground Pool Solar Cover is one that I was surprised by because of the price it was at. It had a great price for the quality of product that I was getting and that really helped make it much easier to recommend for this particular category! It is double-sided so you don’t have to see which side is up or down. It provides what most other thermal blankets on the market are providing at a great price as well! The only thing I could nitpick is that it did not provide the heat I was looking for but still, it was great!
Pros and Cons
| Pros | Cons |
| Great price | Did not get desired solar heat |
| Double-sided | |
| Great quality of the thermal blanket |
10. Best for All Inflatable Round Style Hot Tub – MADHOLLY Spa and Hot Tub Cover- 16-mil Hot Tub Thermal Blanket
Specification
- Brand: MADHOLLY
- Product Dimension: 82.7″L x 82.7″W
- Style: Modern
- Material: Polyethylene
- Shape: Round
Description
Get the perfect thermal blanket for your inflatable round hot tub with the MADHOLLY Spa and Hot Tub Cover- 16-mil Hot Tub Thermal Blanket!
Features
- 16mm thickness: great durability with heavy-duty performance
- Lightweight: only weighs about 4 pounds
- Thermal efficiency: keeps the heat trapped inside
How to use
When using the MADHOLLY Spa and Hot Tub Cover- 16-mil Hot Tub Thermal Blanket, you need to make sure that it fits your hot tub precisely. For that, you simply need to cover the entire hot tub bubble side down and then trim the edges to make sure that it fits perfectly on your hot tub. This thermal blanket works by heating up the pockets of air in the bubbles which transfer the heat to the hot tub and keep the water warm for your next dip!
After a week, do a check-up on the thermal blanket by washing it with mild soap and water to clean the dirt from the surface of the blanket. Make sure to also inspect any damages like wear and tear of the thermal blanket before putting it back on your hot tub.
Expert Verdict
While inflatable hot tubs are really not my thing, I can appreciate how well this oblong-shaped MADHOLLY Spa and Hot Tub Cover- 16-mil Hot Tub Thermal Blanket works in keeping the heat trapped inside at all times. You can keep your hot tub out and not worry about the water temperature dropping all that much either. Even with the water level, I could see that it did well to insulate the hot tub perfectly and keep it nicely warm for my next solo hot tub relaxation. The only downside is that it is quite an expensive thermal blanket for an inflatable hot tub and there are cheaper alternatives. But they might not work as well as this one does!
Pros and Cons
| Pros | Cons |
| Lightweight; easy to carry around | Expensive for an inflatable hot tub blanket |
| Heat insulator | |
| Little to no water loss |
Key Features To Look Out For Thermal Blankets for Hot Tub
The first thing that you want to look out for in a thermal blanket for your hot tub is to make sure that the material is good enough. The best material for thermal blankets for hot tubs is vinyl and the more durable PVC. This help to add a perfect insulation layer for your hot tub while also being durable enough to last for a long time. The heat retention from these two materials is the best and makes sure that your hot tub water stays warm even on days you aren’t using it! These materials do all of that while also being safe to use even under the fluctuation of outside weather that might change the composition of chemicals in the water.
The next to watch out for in hot tub thermal blankets is bubble wrap that is on the thermal blanket. These bubble wraps might look silly, but their effectiveness is very good. Firstly, they provide extra pockets of air which you are able to absorb heat from the outside and safely transfer to the hot tub water. It does all of that while also keeping the hot tub water safe.
The last thing that you need to consider is if it will fit your hot tub. While most thermal blankets can be too big for your hot tub, you can very easily trim it down to the shape of your hot tub. The only thing that you have to worry about is if the thermal blanket is too small for the hot tub or not. You might void the warranty of your thermal blanket if you trim it but most thermal blankets come with an indication of how much you can cut without voiding the warranty.
Can Thermal Blankets Be Customized For Hot Tubs?
The only thing that you need to worry about when trying to customize your thermal blanket for the hot tub is to trim it down the size to fit your hot tub. That is the only customization that you need for your thermal blanket. Other types of customization might be too heavy for the thermal blanket and cause it to not sit on top of your hot tub water. If it is submerged, then it won’t be able to cover the hot tub water and help heat it up. It will also not be able to keep it protected from dirt and leaves from surrounding trees and the environment in general. When you are trimming the thermal blanket, you will have to make sure that you are only cutting the space between the bubble wrap. If you puncture or make holes in the thermal blanket, then it will defeat the purpose of keeping your hot tub water warm because the heat will escape from the holes! That is why you should follow the guidelines that the manufacturer put out for you so that you keep it safe while also not voiding the warranty that comes with the thermal blanket!
While not a customization, you will however need to clean your hot tub thermal blanket because it will get dirt on it. This will reduce the effectiveness of the blanket from heating up the hot tub water and reduce the evaporation rate because the material that clings to will absorb it.
FAQs
1. Do thermal blankets work on hot tubs?
Yes, they do! They help to add a layer of heat protection and keep the water warm and protected against dirt and leaves from falling on it.
2. What is a hot tub thermal blanket?
A hot tub thermal blanket is a blanket cover that has pockets of bubbles on one side which needs to be face down on the hot tub water and it heats the air in the bubble which in turn heats the water and keeps it warm.
3. What are the benefits of a spa blanket?
A spa blanket helps to give your spa a cover to keep it protected from the environment and keep the water warm all the while keeping the water clean in a cost-effective way.
4. Should I insulate under my hot tub?
While most hot tubs are already insulated, to begin with, you can add an extra layer of insulation around the cabinet which helps to keep most of the heat from leaving the hot tub.
5. Are thermal blankets worth it?
Yes, thermal blankets are well worth it! They help to stop about 90% of the water from evaporating from the surface of the water.
Final Thoughts
Hot tub thermal blankets are a tricky thing to buy because most if not all of them are advertised for large pools and such. But still, I am glad to have found these 10 amazing thermal blankets for hot tubs because they really are multi-purpose and very easy to shape for your hot tub. They all worked really well but I have to give props to where props are due to the Sun2Solar Blue 7-Foot-by-7-Foot Square Solar Cover and KETNET Solar Pool Cover Irregular Above Ground and In-Ground Pool Solar Cover! The Sun2Solar edges the KETNET by a hair but that is what is so great about comparing products because you get to see what you are missing out! I hope one of these thermal blankets or solar covers has piqued your interest. With cooler weather on the horizon, it is the perfect time to keep your hot tubs well-protected while it is not in use!
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I am Donald M. Beyer and I am backyard enthusiasts. I am a homeowner who has been doing DIY projects in and out of my house for many years. From simple backyard lunches to making an old-school pizza oven in my own backyard, I have a lot of experience in turning my backyard into my and my family’s personal playground.
