Do You Need a Pool Pillow for Winter?

This one is for above ground pool owners. The idea behind adding an air pillow under your cover is that it absorbs the pressure from expanding ice. And that takes pressure away from your pool walls. They also keep water from pooling in the middle of your cover, where it’s hardest to reach.

I’m not totally convinced that they’ll protect you from ice damage. They’re just floating on top. But it does help with water pooling in the middle.

So do you need to use a pool pillow? Maybe, but I’m leaning no. I really don’t think it’s going to save your pool from real ice damage, but it does help with water pooling in the middle. And it’s only for above ground pools in freezing climates.

What Is a Pool Air Pillow?

It’s a vinyl, inflatable pillow you place in the middle of your above ground pool, between the water and the winter cover.

A pool air pillow is used to compensate for the accumulation of rain, snow, and ice that may build up on the pool cover over the winter months.

By placing an air-filled pool pillow under the winter cover, you create a void in the water and on the top of the cover. When rain, snow, and ice accumulate and pressure builds on the cover, the ice will expand inward toward the pillow.

Without the pool air pillow, ice would expand outward, putting pressure on your pool walls and causing potential damage to your cover, liner, and pool walls.

How to Use a Pool Pillow Under Your Above Ground Winter Cover

It’s easy to integrate this into the process of winterizing your above ground pool.

1. Decide How Many Air Pillows Your Pool Needs

You need to know the size of your pool first. The best way to figure this out is to measure the diameter of your pool. You don’t need to know the volume, but if you’re curious, you can use our pool volume calculator.

Pool Size	Recommended Pillow	Maximum Pillow Size
12 ft round	4 x 4 ft	4 x 8 ft
15 ft round	4 x 4 ft	4 x 8 ft
16 ft round	4 x 4 ft	4 x 8 ft
18 ft round	4 x 8 ft	Two 4 x 4 ft
21 ft round	4 x 8 ft	One 4 x 15 ft or two 4 x 8 ft
24 ft round	4 x 8 ft	One 4 x 15 ft or two 4 x 8 ft
27 ft round	4 x 15 ft	Two 4 x 15 ft
28 ft round	4 x 15 ft	Two 4 x 15 ft
30 ft round	4 x 15 ft	Two 4 x 15 ft
33 ft round	4 x 15 ft	Two 4 x 15 ft
12 x 18 ft oval	4 x 4 ft	4 x 8 ft
12 x 20 ft oval	4 x 8 ft	4 x 15 ft
12 x 24 ft oval	4 x 8 ft	4 x 15 ft
15 x 24 ft oval	4 x 8 ft	4 x 15 ft
15 x 26 ft oval	4 x 8 ft	4 x 15 ft
15 x 30 ft oval	4 x 8 ft	4 x 15 ft
16 x 25 ft oval	4 x 8 ft	4 x 15 ft
16 x 32 ft oval	4 x 8 ft	4 x 15 ft
18 x 34 ft oval	4 x 15 ft	4 x 15 ft
18 x 36 ft oval	4 x 15 ft	4 x 15 ft
18 x 38 ft oval	4 x 15 ft	4 x 15 ft
18 x 40 ft oval	4 x 15 ft	Two 4 x 15 ft
21 x 41 ft oval	4 x 15 ft	Two 4 x 15 ft
21 x 43 ft oval	4 x 15 ft	Two 4 x 15 ft

2. Inflate the Air Pillow(s)

Inflate the pool air pillow to only 50% to 80% of its capacity to allow for compression. If you overfill the air pillow, it’s more likely to pop during the winter. This is a common complaint.

To inflate it, you can use:

• An electric air pump
• A hair dryer on the cool setting
• A shop vac in reverse.

My favorite tool for the job is this portable air compressor. I use it for inflating car tires, bike tires, pool floats, and more.

3. Anchor Pillow(s) to The Center of The Pool

The reason you want it in the center of the pool is to make it easier to remove water off the cover around the edges. So there are two ways to do this:

1. Tie strong string or thin rope to both ends of the pillow. The pillows have grommets on the edges for this purpose. Place the pillow in the center of the pool. Secure the other ends of the strings to the edge of the pool to keep the pillow in place.
2. Use a Velcro centering tool like The Pool Pillow Pal. This product has been around as long as I have. And I highly recommend it. The pillow sticks to the center of the underside of your winter pool cover.

4. Place Your Winter Cover Over the Pillow(s)

Pull the winter cover over the pool, being careful to keep it above the pillow. (This may be easier with the help of a friend or two.) Then, secure the cover using the cable and winch, cover clips, and water bags.

If the pool pillow moves while you’re putting the cover on, you can slide a pole under the cover to move the pillow back into place. Just make sure it doesn’t have a sharp point that can puncture the pillow, the cover, or both!

Important: We highly recommend using an actual pool air pillow for this purpose. Inner tubes or exercise balls won’t work as well.

Common Questions About Pool Pillows

Do I need an air pillow for inground pool?

No. Air pillows are really only for above ground pools to help with water removal from the top of the cover. They also claim to prevent ice expansion damage against the walls. Since an inground pool is literally in the ground, ice expansion against the walls shouldn’t be an issue.

Are pool pillows necessary?

No, not really. A pool pillow is supposed to absorb pressure from expanding ice so it doesn’t push on your pool walls. But I’m not convinced it does much when it’s just floating on top of the water and not submerged. Where it does help is keeping water from pooling in the middle of your cover. This makes it easier to remove the water since it pushes the pooling water to the edges where you can reach it.

Do I need a pool pillow if I live in a mild climate?

If your pool water doesn’t freeze, you don’t need a pillow. That said, it does help with water removal off the cover.

What if my pool pillow pops or deflates over the winter?

Nothing. I would just leave it alone. Just keep an eye on your cover and pump off any water that collects in the middle. If you’re worried about freezing, it doesn’t matter where the pillow sits under your cover, so you can add another one at any time without needing to push it to the middle.

How do I keep my pool pillow from popping?

• Don’t overinflate it. Fill it to about 50% to 80% so it has room to compress.
• Duct tape the air valve. Make sure it’s closed, then put duct tape over it.
• Tie it loosely. If the strings are too tight, wind and ice will rip the pillow.

Can I use a pool pillow with a mesh or safety cover?

You can, but you don’t need one. A mesh cover lets rain and snowmelt drain right through, so water won’t pool on top. And you don’t need to worry about the ice expansion putting pressure on the pool walls because it’s in the ground.

Can I use a pool pillow on an Intex pool?

Yes. But I would recommend taking the pool down if it’s small enough. Otherwise, if you have a large pool, then treat it the same way as any other above ground pool. Make sure you winterize it correctly.

What do I do with my pool pillow in the spring?

Pump the water off your cover and clear off any leaves first, so all that junk doesn’t end up in your pool. Then remove the cover, untie the pillow, and let the air out. If it’s still in good shape, rinse it off, let it dry completely, and store it somewhere dry until fall.

Can I reuse or patch a pool pillow?

Yes. But honestly, they’re so cheap, it’s probably just worth replacing. Otherwise, if you try to patch it, it might deflate during the winter.

What if water still pools on my cover?

Get a cover pump. Even with a pillow, rain and snowmelt can collect on your cover, and too much weight will stretch it or pull it into the pool. Check out our guide to the best pool cover pumps to find one.

Key Takeaways

• Pool pillows are a maybe, but I’m leaning no. I don’t think they’ll protect your pool from real ice damage. But they do help keep water from pooling in the middle of your cover.
• They’re only for above ground pools in freezing climates. Inground pools don’t need one.
• Only fill it 50% to 80% full. Overinflating is the reason they pop.
• Tape the valve and tie the pillow loosely to the center of the pool so wind and ice don’t tear the grommets.
• If your pillow pops, don’t worry. Keep your cover pumped off and your pool will be fine.