winter pool cover 21 ft round above ground
Worth a lookShows demand growing +371.2% this quarter, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Growth
Incredible+371.2%90-day search growth — must beat 0% to launch
Quality gap
Great4.0★avg incumbent rating — lower means beatable quality
Avg price
Great$75.62avg listing price — sweet spot $15–$100
Price range
Great$27.14–$114.96cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Good2.2%return rate — above 5% kills the launch gate
Review moat
Good1,024.46avg incumbent reviews — the moat a new listing must climb
Competition
Okay55%top-5 click share — leaders hold, buyers still browse
Brand share
Okay79%top-5 brand share — brands hold most of the demand
Conversion
Okay2.8%search→purchase rate — share of searches ending in a sale
Market size
Bad$55K$55K/yr · 26K searches
According to Flapen's Amazon United States niche tracking, winter pool cover 21 ft round above ground is a $55K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Aug–Sep–Oct. Verdict: Worth a look — 60/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
winter pool cover 21 ft round above ground market data
- Units sold / yr
- 1K–1K
- avg 0–100/product
- Revenue / yr
- $76K–$95K
- units × avg price
- Conversion rate
- 2.8%
- Avg BSR
- #279
- Page quality
- 0%
- Prime
- 79%
- Sponsored
- 88%
- Out of stock
- 17.2%
- Avg brand age
- 32 months
- Avg seller age
- 212 days
Competition & brand share
The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
22
Top-5 brand share
79%
Top 20: 100%
Top-5 click share
55%
Top 20: 97%
Open market
16%
- QH.HOME37%
- SIHAIAN15%
- Shop Square12%
- UIRWAY10%
- Holiwei5%
- Sun2Solar5%
- Open — no brand owns it (8 brands, 16%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +371.2% search growth over the last 90 days.Peak months: Aug, Sep, Oct · busiest ÷ quietest = 44.6×
Top winter pool cover 21 ft round above ground search terms
- 20 ft pool cover7K/yr
- 20ft pool cover5K/yr
- pool cover 20 ft round5K/yr
- 20 foot pool cover4K/yr
- 20 ft round pool cover3K/yr
- 20 ft pool cover round above ground3K/yr
Top winter pool cover 21 ft round above ground products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SIHAIAN 20 Ft Round Pool Cover with Automatic Drain Pool Cover Patented One-Piece Tensioning System Above Ground Pool Cover Preventing Waterlogging Yarn-Dyed Oxford Fabric Solar Pool Cover
SIHAIAN$81.074.1★904 rev
![QH.HOME 20ft Round Pool Cover [Ultimate Windproof & Tear-Resistant Fabric] Snug Fit with Patented Ratchet & Weight Rings Solar Pool Cover for Above Ground Pools Blocks Leaves &Waterproof](https://m.media-amazon.com/images/I/41J3FURJ0ML.jpg)
QH.HOME 20ft Round Pool Cover [Ultimate Windproof & Tear-Resistant Fabric] Snug Fit with Patented Ratchet & Weight Rings Solar Pool Cover for Above Ground Pools Blocks Leaves &Waterproof
QH.HOME$108.214.2★1,372 rev
21 ft Round Pool Cover for Above Ground Pools Above Ground Cover for Winter Keeps Out Debris Cold and UV Resistant Supreme Mesh Navy Blue
Shop Square$41.763.8★726 rev
![QH.HOME 550D 20 ft Pool Cover Round[Upgraded Tear Resistant & Quadruple Windproof] wth Pre-Installed Patented Winch and Rope Pool Covers for Above Ground Pools-Snug Fit & Waterproof Protection](https://m.media-amazon.com/images/I/41zo5NnZO3L.jpg)
QH.HOME 550D 20 ft Pool Cover Round[Upgraded Tear Resistant & Quadruple Windproof] wth Pre-Installed Patented Winch and Rope Pool Covers for Above Ground Pools-Snug Fit & Waterproof Protection
QH.HOME$96.714.4★297 rev
QH.HOME 20Ft Round Pool Cover Super Windproof Ratchet Straps (1 500lb Break Strength)-Effective Installation/Removal Pool Cover for Above Ground Pools Snug Fit Blocks Leaves Sun & Water
QH.HOME$105.684.4★152 rev
Newest
by launch dateQH.HOME 550D 20 ft Pool Cover Round[Upgraded Tear Resistant & Quadruple Windproof] wth Pre-Installed Patented Winch and Rope Pool Covers for Above Ground Pools-Snug Fit & Waterproof Protection
QH.HOME$96.71297 rev
QH.HOME 20Ft Round Pool Cover Super Windproof Ratchet Straps (1 500lb Break Strength)-Effective Installation/Removal Pool Cover for Above Ground Pools Snug Fit Blocks Leaves Sun & Water
QH.HOME$105.68152 rev
![QH.HOME 21 Ft Heavy Duty Winter Pool Cover for 21 Ft Steel Wall Pool 4 ft Overlap (25ft Cover Size) [Excellent Windproof ] Fast Tightening Ratchet & Counterweight Ring Cold and UV Resistant](https://m.media-amazon.com/images/I/41BaVdbQrDL.jpg)
QH.HOME 21 Ft Heavy Duty Winter Pool Cover for 21 Ft Steel Wall Pool 4 ft Overlap (25ft Cover Size) [Excellent Windproof ] Fast Tightening Ratchet & Counterweight Ring Cold and UV Resistant
QH.HOME$93.121,372 rev
QH.HOME 21Ft Heavy Duty Winter Round Pool Cover Super Windproof Ratchet Straps (1 500lb Break Strength)-Effective Installation/Removal Snug Fit Blocks Leaves Sun & Water
QH.HOME$100.48152 rev
UIRWAY 18 Ft Round Pool Cover with Reflective Strips Swimming Pool Cover for Above Ground Pools Solar Cover Including Rope Tie and Luminous Ground Nails PU Tarp Snug Fit for UV Protected
UIRWAY$72.701,764 rev
Trending
90-day click momentumQH.HOME 21 Ft Heavy Duty Winter Pool Cover for 21 Ft Steel Wall Pool 4 ft Overlap (25ft Cover Size) [Excellent Windproof ] Fast Tightening Ratchet & Counterweight Ring Cold and UV Resistant
QH.HOME$93.124.2★
QH.HOME 21Ft Heavy Duty Winter Round Pool Cover Super Windproof Ratchet Straps (1 500lb Break Strength)-Effective Installation/Removal Snug Fit Blocks Leaves Sun & Water
QH.HOME$100.484.4★
UIRWAY 21 Ft Round Pool Cover with Reflective Strips Swimming Pool Cover for Above Ground Pools Solar Cover Including Rope Tie and Luminous Ground Nails PU Tarp Snug Fit for UV Protected
UIRWAY$94.604.0★
SIHAIAN 20Ft Round Pool Cover Prevents Water Accumulation Above Ground Pool Cover Quick Installation and Removal One-Piece Pool Cover Lockable Windproof UV-Resistant Tear-Resistant Solar Cover
SIHAIAN$92.614.0★
UIRWAY 18 Ft Round Pool Cover with Reflective Strips Swimming Pool Cover for Above Ground Pools Solar Cover Including Rope Tie and Luminous Ground Nails PU Tarp Snug Fit for UV Protected
UIRWAY$72.704.0★
What buyers say about winter pool cover 21 ft round above ground
What buyers praise and complain about, mined from review topics.What buyers love
“the actual cover is very good”
“Fits great”
“Cant beat the price”
“also the material feels durable and well-made”
“its so easy to put on”
“Material is durable”
“Water looked great”
“Works as described”
“Its lightweight”
“Easy and sturdy”
What buyers complain about
“Lasted two days”
“Not very well made”
“It seemed slightly smaller than other covers saying they were the same size”
“Thin and cheap”
“Very disappointing considering the price I paid for it”
“After the first rain the cover sink into the pool”
“I had the stitching rip off when I was tightening it”
“Cheap material”
“it is dirty after it fell in the pool since the string wouldnt tighten”
“Not the way it shows”
Top return reasons
Common questions
- Is winter pool cover 21 ft round above ground profitable to sell on Amazon United States?
- The niche generates $55K/yr across 24 tracked products. 7 of 9 products launched in the last 360 days are still selling. 90-day search growth is +371.2%. Flapen's verdict: Worth a look (60/100).
- How competitive is the winter pool cover 21 ft round above ground niche?
- 14 brands and 22 sellers compete. The top 5 products take 55% of clicks and top 5 brands hold 79% of demand.
- What do buyers complain about in winter pool cover 21 ft round above ground?
- Top complaints mined from reviews: Durability, Quality-Overall, Size-Overall. The return rate is 2.2%.
- When does demand for winter pool cover 21 ft round above ground peak?
- Demand peaks in Aug–Sep–Oct; the busiest month runs 44.6× the quietest.
- What does it cost to enter the winter pool cover 21 ft round above ground niche?
- Listings span $27.14–$114.96; the average listing price is $75.62 (sweet spot $15–$100). The average incumbent carries 1,024 reviews — the moat a new listing must climb.