Best Winter Pool Cover

A leaf net, a debris cover and a safety cover are three things

This is the confusion that costs money. A leaf net is a mesh sheet that lies on top of a winter cover to catch the season's leaves so you can lift them off in one go. A winter debris cover is the solid sheet underneath it that keeps water, dirt and light out of the pool. A safety cover is a tensioned mesh cover anchored into the deck, and it is the only one of the three designed to take weight.

This page is about the second and third. If you already know you want a net to go over the top, that is its own page.

Mesh or solid: the decision that comes first

The trade is genuine in both directions. Mesh means no ponding, no cover pump and a barrier you can stand on - at the cost of dirtier water in April, because dirt and light both get through. Solid means the cleanest possible spring opening and a much lower price, at the cost of a cover that collects water and cannot take any weight at all.

How we compared them

Nothing about a folded cover is visible in a photograph, and we have handled none of these. What can be compared is what each maker is willing to publish, and in this category most of them publish very little.

• **Scrim count.** The thread count of the woven base fabric - 7x7 means seven threads per inch each way. It is the density figure that drives tear resistance, and it is the first thing a thin cover's listing omits.
• **Fabric weight.** Ounces per square yard, or grams per square meter. Exactly one cover here publishes it.
• **Overlap.** The material beyond the pool edge, which is what you anchor. 4 ft is standard on an above-ground cover; a safety cover is cut roughly 2 ft larger all round.
• **Warranty term.** In a category with almost no measurable specifications, the maker's own warranty is the closest thing to a service-life estimate - and it is usually prorated, so read what year one actually covers.
• **What is in the box.** Above-ground covers usually include the cable and winch. Inground solid covers usually do not include the water tubes, which are a real added cost.
• **Seams and underside.** Heat-sealed seams and a black underside are the standard solid-cover claims; the black underside is what stops algae growing under the cover all winter.

Only the Robelle publishes both a scrim count and a fabric weight, which is why it leads the page. Blue Wave's Gold cover is the odd case: it is the dearer of its two inground covers and publishes a 15-year warranty but no scrim, while the cheaper Arctic Armor publishes 7x7 scrim and no warranty. Its above-ground sibling publishes a denser 10x12 and still no weight. You are choosing which figure you trust.

Sizing: the overlap is not optional

A winter cover is cut to one pool. There is no adjusting it afterward, so the measurement is the purchase. The number that catches people out is the overlap - the material beyond the water's edge that you anchor.

On an oddly shaped pool, or one with a step that intrudes into the water, a mesh safety cover has to be cut to that shape - VEVOR's is made for a 4 x 8 ft center end step. Measure the step as well as the pool before ordering, because a safety cover with the step in the wrong place cannot be fitted at all.

The picks

Top pick - The most completely specified above-ground cover

Robelle Heavy Duty Super Winter Cover for Above-Ground Pools, 24 ft round

The only cover on this page that publishes a fabric weight as well as a scrim count, which makes it the one you can genuinely compare.

The published figure

Solid polyethylene at 2.36 oz per square yard (80 g/m2), 8x8 scrim, 4 ft overlap, winch and cable included, 10-year warranty

Robelle states 2.36 ounces per square yard - 80 grams per square meter - on an 8x8 scrim. Two figures where most listings give none, and 8x8 is a denser weave than the 7x7 on the Blue Wave above-ground cover. It also claims the material is 18% heavier than the industry standard, which is a comparative claim rather than a measurement, so treat the 2.36 oz/sq yd as the fact.

A 4 ft overlap is the material beyond the pool edge, and it is what you tuck and anchor. On a round above-ground pool that overlap plus the cable and winch is the whole fitting system, and both are included here.

A 10-year warranty is shorter than the Blue Wave Gold's 15, but this is an above-ground cover at a fraction of the price.

What it does well

• Fabric weight and scrim count both published
• Winch and cable included, so nothing else to buy to fit it
• 10-year warranty on an inexpensive cover

What it costs you

• Solid, so it will pond and needs a cover pump or a siphon
• The 18%-heavier claim is comparative and unverifiable
• Round 24 ft only - covers are sized to one pool

Skip it if your pool is not 24 ft round. Every cover in this category is cut to one size, so buy the one that matches yours.

$72.64 - View on Amazon

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Pick 2 - The longest stated warranty

Blue Wave Gold 15-Year Rectangular In-Ground Winter Cover, 18 x 36 ft

A 15-year prorated warranty is the longest commitment any cover on this page makes, and warranty length is the closest thing this category has to a durability figure.

The published figure

Solid polyethylene, heat-sealed seams, black underside, sewn loops every 4 ft; 15-year limited warranty, full in year 1 and prorated through year 15

Nothing about a winter cover is measurable from a photograph, so the warranty is doing real work as a proxy. Blue Wave states 15 years, full coverage in year one and prorated from year two - read that as the maker's own estimate of service life rather than as fifteen years of free replacement.

The construction claims are the standard solid-cover set: heat-sealed seams for a watertight bond, and a black underside to block the sunlight that would otherwise grow algae under the cover all winter.

Sewn loops every 4 ft take water tubes rather than deck anchors, so nothing is drilled into your deck. The tubes are sold separately and you will need them - see the picks below.

What it does well

• 15-year limited warranty, the longest stated here
• Sewn loops every 4 ft, so no deck anchors and no drilling
• Black underside blocks the light that feeds algae under a cover

What it costs you

• The listing states no scrim count, so it cannot be compared on fabric density
• Water tubes are not included
• A debris cover, not a safety cover - the maker states it must never be walked on

Skip it if you want a barrier that resists a child or a pet. No solid debris cover does that, whatever it costs; buy a mesh safety cover with anchors.

$123.50 - View on Amazon

$209.98 · 41% off

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Pick 3 - An actual safety barrier

VEVOR In-Ground Pool Safety Cover, 18 x 36 ft with 4 x 8 ft Center End Step

The only cover here that is anchored into the deck and tensioned, which is the difference between a debris cover and a barrier.

The published figure

Polypropylene mesh, triple-stitched seams and double strapping; cut to 20 x 38 ft for a 2 ft overlap; brass anchors, stainless springs, straps and install tools included

A mesh safety cover is drilled into the deck on brass anchors and tensioned with stainless springs, all of which VEVOR states are included along with the installation tools. That tension is what makes it a barrier; a solid debris cover simply lies on the water and the maker will tell you not to step on it.

It is cut to 20 x 38 ft for an 18 x 36 ft pool - a 2 ft overlap all round - and is shaped for a 4 x 8 ft center end step. Measure your own pool and step before ordering, because a safety cover is cut to a shape and cannot be adjusted afterward.

The mesh drains. Rain and snowmelt pass straight through into the pool rather than ponding on top, which is why a safety cover needs no cover pump. The cost is that sunlight and fine dirt pass through too.

What it does well

• Anchored and tensioned, so it functions as a barrier rather than a lid
• Drains rain and snowmelt - no cover pump, no ponding, no two-ton puddle
• Anchors, springs, straps and tools all stated as included

What it costs you

• Needs holes drilled in the deck, which is permanent
• Fine dirt and light pass through, so the water is dirtier at opening
• Several times the price of a solid cover, and cut to one pool shape

Skip it if you have no deck to anchor into, or you want the cleanest possible water in April. A solid cover keeps more out; it just cannot hold weight.

$372.90 - View on Amazon

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Pick 4 - A published scrim count at a lower price

Blue Wave Arctic Armor Rectangular In-Ground Winter Cover, 18 x 36 ft

Publishes the scrim count the Gold cover does not, which is the one fabric figure you can actually compare across brands.

The published figure

7x7 scrim woven polyethylene, heat-sealed seams, black underside, sewn loops every 4 ft

Scrim is the thread count of the woven base fabric - 7x7 means seven threads per inch each way. It is the density number that decides tear resistance, and it is the figure most cover listings quietly omit. Blue Wave states it here and does not state it on the dearer Gold cover.

Everything else matches the Gold: heat-sealed seams, black underside, sewn loops every 4 ft for water tubes, no deck anchors.

What it does not state is a warranty term. That is the trade against the Gold cover, and it is a real one - you are choosing a published fabric figure over a published service-life estimate.

What it does well

• 7x7 scrim published, so the fabric can be compared
• Costs meaningfully less than the Gold cover
• Same loops-and-tubes fitting, no deck anchors

What it costs you

• No warranty term stated on the listing
• Water tubes sold separately
• Also a debris cover, never a safety cover

Skip it if you plan to keep the pool covered for a decade. The Gold cover's stated warranty is the better proxy for that, even without a scrim figure.

$80.98 - View on Amazon

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Pick 5 - Grommets closer together

Blue Wave Arctic Armor Round Above-Ground Winter Cover, 24 ft

Grommets every 2 ft rather than the usual wider spacing, which is what stops a round cover lifting at the edge in wind.

The published figure

10x12 scrim woven polyethylene, heat-sealed seams, aluminum grommets every 2 ft, 4 ft overlap, vinyl-coated cable and winch included

Blue Wave states aluminum grommets every 2 ft. Grommet spacing decides how evenly the cable pulls the edge down, and a cover that lifts between grommets in a gale is how covers end up in the pool.

10x12 scrim woven polyethylene with reinforced heat-sealed seams, which Blue Wave states blocks leaves, debris and rain and blocks sunlight through the cover.

The vinyl-coated cable and the winch are included, so the fitting hardware is in the box.

What it does well

• Aluminum grommets every 2 ft for an even pull around the edge
• 10x12 scrim published, a denser weave than the 8x8 covers here
• Vinyl-coated cable and winch included; stated to block sunlight

What it costs you

• Lighter than the Robelle and it does not publish a fabric weight
• No warranty term stated on the listing
• Solid, so it ponds and needs pumping or siphoning

Skip it if you want a published fabric weight. Robelle states 2.36 oz/sq yd; this listing publishes a scrim count but no weight.

$99.99 - View on Amazon

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Pick 6 - Anchoring a solid inground cover

Blue Wave 8 ft Double Water Tubes for Winter Pool Covers, 5 pack

Dual chambers mean one puncture does not free a whole length of cover edge, which is the failure that puts covers in pools.

The published figure

18-gauge vinyl, dual independent chambers, stated to hold from -10 F to 180 F, garden hose valve; 5 tubes per pack

A solid inground cover with sewn loops is held down entirely by water tubes. Blue Wave states two independent chambers per tube, so a split in one still leaves the other holding that section of edge.

18-gauge vinyl and a stated -10 F to 180 F range are the durability figures. Vinyl that stiffens and cracks in deep cold is the usual reason tubes last one season.

Fill each tube three-quarters full, which the maker states explicitly. A full tube has no room for the water inside it to expand when it freezes, and it splits.

What it does well

• Dual chambers, so one puncture does not release the edge
• 18-gauge vinyl with a stated temperature range
• Fills from a garden hose and drains flat for storage

What it costs you

• Five tubes will not go round a large pool - most need eight to twelve
• Water tubes are a consumable; expect to replace some every few years
• Useless on an above-ground pool, which uses a cable and winch instead

Skip it if your pool is above ground. The cover's own cable and winch do this job and tubes have nowhere to sit.

$32.03 - View on Amazon

$42.48 · 25% off

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Pick 7 - Larger round pools

Swimline Above-Ground Pool Winter Cover Air Pillow, 4 x 8 ft

Twice the footprint of a 4 x 4 for about the same money, which is the right shape for a bigger pool even though the listing states no gauge.

The published figure

4 x 8 ft cushion with a large valve opening; described by the maker as an ice compensator

Swimline calls these ice compensators, which is the clearest description of the job in this category: they absorb the pressure of freezing and expanding water so that the pool wall and the cover do not.

4 x 8 ft is the size that suits a larger round above-ground pool, where a small pillow leaves too much of the surface free to freeze flat against the cover.

The listing states puncture-resistant heavy-duty material but no gauge, so it cannot be compared with the Blue Wave pillow on construction. The large valve is a genuine convenience when you are inflating it in October.

What it does well

• 4 x 8 ft suits larger round pools
• Large valve opening makes inflating and deflating quick
• Deflates flat for storage

What it costs you

• No vinyl gauge stated, so construction cannot be compared
• No warranty or expected life stated
• Still needs rope to tie it in place

Skip it if you want a published construction figure. Blue Wave states 16-gauge vinyl and this listing states none.

$14.94 - View on Amazon

$24.95 · 40% off

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Pick 8 - A published vinyl gauge

Blue Wave Air Pillow for Above-Ground Pools, 4 x 4 ft

Publishes its vinyl gauge, which is the only figure that separates a pillow that survives one winter from one that survives five.

The published figure

4 x 4 ft, 16-gauge vinyl with heat-sealed seams on every edge, built-in valve for a standard air pump

An air pillow is not there to hold the cover up. It is there to take the expansion of freezing water, so the ice pushes against a compressible cushion instead of against the pool wall. Blue Wave states exactly that, and it is the reason above-ground pools in freezing climates use one.

16-gauge vinyl with heat-sealed seams is the published construction. A pillow that deflates in January has stopped doing its job for the rest of the winter, which is why the gauge matters more than the size.

Inflate firm but not taut - an over-inflated pillow splits at the seam on the first hard freeze. Blue Wave says the same, and adds that the rope to tie it in place is sold separately.

What it does well

• 16-gauge vinyl stated, unlike most pillows
• Heat-sealed seams on every edge
• Inflates with any standard air pump through a built-in valve

What it costs you

• 4 x 4 ft is small for a large round pool
• Rope not included
• Nothing on the listing states how many seasons it should last

Skip it if your pool is 24 ft or more across. One 4 x 4 pillow will not center the load on a pool that size - use a larger pillow or two of these.

$11.61 - View on Amazon

$12.73 · 9% off

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Anchoring is half the product

A cover that is not held down is a sail. How it is held down depends entirely on which type you bought, and it is worth knowing before you order because two of the three methods cost extra.

• **Above-ground, solid:** a vinyl-coated cable threads through grommets around the edge and a winch pulls it tight. Both Robelle and Blue Wave include the cable and winch. Grommet spacing matters - Blue Wave states one every 2 ft, which pulls the edge down more evenly than wider spacing.
• **Inground, solid:** sewn loops every 4 ft take water tubes laid end to end around the deck. No drilling, but the tubes are sold separately and you need enough to go all the way round - a five-pack of 8 ft tubes covers 40 ft of perimeter, and an 18 x 36 ft pool has 108 ft.
• **Inground, mesh safety:** brass anchors are drilled into the deck and stainless springs tension the straps. Permanent, and the reason a safety cover works. VEVOR states the anchors, springs, straps and tools are all included.

Never use bricks, paving slabs or anything with a hard edge to hold a cover down. They tear the cover, and on an inground pool they end up in the deep end.

The air pillow, and what it is actually for

The common belief is that the pillow holds the cover up out of the water. It does do that, but it is not the point. Its job is to take the expansion of freezing water: ice pushes against a compressible cushion in the middle of the pool instead of outward against the walls. Swimline's own term for these is ice compensators, which is the clearest description in the category.

Two practical rules. Inflate it firm but not taut, because an over-inflated pillow splits at the seam on the first hard freeze. And scale it to the pool - a 4 x 4 ft pillow is fine on a small pool and lost on a 24 ft one, where a 4 x 8 or two pillows is the sensible answer. Both pillows here need rope to tie them in place, and neither includes it.

An air pillow is an above-ground product. On an inground pool the walls are not going anywhere, and the cover is held by tubes or anchors instead.

Fitting one so it survives February

1. **Close the water first.** The cover goes on last - after the closing chemicals, and after the shock has fallen back to normal. High chlorine under a cover degrades it from below.
2. **Lower the water to the level your cover type wants.** Below the skimmer for a solid cover in a freeze climate; a safety cover is usually fitted with the water much closer to normal, per its own instructions.
3. **Inflate and tie the pillow in first,** if you are using one, and center it before the cover goes over the top.
4. **Work the cover square before you tension anything.** A cover pulled tight while it is sitting crooked will never sit right, and the strain goes into one corner all winter.
5. **Tension evenly.** Winch a little at a time going round, rather than pulling one section fully tight first.
6. **Put the cover pump on before the first storm,** not after - a solid cover ponds, and an inch of rain on a 20 x 40 cover is over two tons.
7. **Sweep snow off the edge, not the middle.** Blue Wave and Robelle both say to use a soft-bristle broom; a shovel or a stiff brush will hole the fabric.

What a winter cover will not do

It will not keep the water balanced. A cover is a physical barrier, not a chemical one, and a pool closed out of range still drifts - which is why the sequence on pool closing chemicals comes first and the cover comes last.

It will not stop every leaf. Leaves land on top, rot into a slurry and go straight into the pool the moment you pull the cover off in spring. That is exactly the problem a leaf net over the top solves, and it is the cheapest thing you can add to a close. The full autumn sequence is on winter leaf control.

And a solid cover will not drain itself, nor roll itself up - that is what a cover reel is for. Fitting it is the last step of a close; the rest of that job is on how to winterize a pool. Every one of them collects water, which is a job for a cover pump or a siphon and the commonest reason a cover tears at the seam.