Skip to content
51

18x33 winter pool cover oval

Worth a look

Shows demand growing +253.5% this quarter, but brand-locked demand (top 5 brands take 97% of clicks) keeps it on the watch list.

Market size 15Growth 99Conversion 38Competition 20Returns 89Price range 44Avg price 72Brand share 7Review moat 72Quality gap 84

Growth

Incredible+253.5%

90-day search growth — must beat 0% to launch

Returns

Great1.3%

return rate — above 5% kills the launch gate

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Review moat

Good613.5

avg incumbent reviews — the moat a new listing must climb

Avg price

Good$107.66

avg listing price — sweet spot $15–$100

Price range

Okay$57.77–$154.42

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Okay3.1%

search→purchase rate — share of searches ending in a sale

Competition

Bad76%

top-5 click share — a locked-up shelf

Market size

Bad$60K

$60K/yr · 18K searches

Brand share

Bad97%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, 18x33 winter pool cover oval is a $60K/yr Amazon United States market (18K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Aug–Sep–Oct. Verdict: Worth a look — 51/100.

Data updated Jul 24, 2026 · scored weekly · How we score niches

18x33 winter pool cover oval market data

Units sold / yr
1K–2K
avg 0–100/product
Revenue / yr
$135K–$161K
units × avg price
Conversion rate
3.1%
Avg BSR
#453
Page quality
0%
Prime
92%
Sponsored
83%
Out of stock
13.5%
Avg brand age
60 months
Avg seller age
232 days

Competition & brand share

The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.

Brands

6 falling

Sellers

14

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

76%

Top 20: 100%

Open market

0%

  • QH.HOME62%
  • Pool Mate13%
  • Robelle12%
  • Winter Block6%
  • iBirdie4%
  • Swimline3%
  • Open — no brand owns it (0%)

Demand & seasonality

Weekly Amazon search volume, last 97 weeks — +253.5% search growth over the last 90 days.
2K2KSpike '24Spike '25Prime Day '25Spike '26SepMarAugNovMarMay

Peak months: Aug, Sep, Oct · busiest ÷ quietest = 70.4×

Top 18x33 winter pool cover oval search terms

  • 18x33 pool cover5K/yr
  • 18 x 33 oval above ground pool winter cover4K/yr
  • 18x33 winter pool cover oval10K/yr
All search terms

Top 18x33 winter pool cover oval 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.

0%10%$6K20%$12K30%$18K40%$24K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 12 tracked products in this niche — three views at once, no toggling.

What buyers say about 18x33 winter pool cover oval

What buyers praise and complain about, mined from review topics.

What buyers love

Assembly/Installation17%

“This was installed correctly”

Thickness17%

“was a thick cover that I was wanting”

Value For Money17%

“For the price would buy again”

Quality-Overall17%

“Good product”

Size-Overall17%

“Fit just right”

What buyers complain about

Quality-Overall67%

“Trouble workmanship”

Durability17%

“still didnt hold up”

Top return reasons

Size-Overall50%
Weight Heavy25%
Defective Material/Parts17%
Quality-Overall17%
Advertised Vs Actual Product8%

Common questions

Is 18x33 winter pool cover oval profitable to sell on Amazon United States?
The niche generates $60K/yr across 12 tracked products. 2 of 4 products launched in the last 360 days are still selling. 90-day search growth is +253.5%. Flapen's verdict: Worth a look (51/100).
How competitive is the 18x33 winter pool cover oval niche?
6 brands and 14 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 97% of demand.
What do buyers complain about in 18x33 winter pool cover oval?
Top complaints mined from reviews: Quality-Overall, Durability. The return rate is 1.3%.
When does demand for 18x33 winter pool cover oval peak?
Demand peaks in Aug–Sep–Oct; the busiest month runs 70.4× the quietest.
What does it cost to enter the 18x33 winter pool cover oval niche?
Listings span $57.77–$154.42; the average listing price is $107.66 (sweet spot $15–$100). The average incumbent carries 614 reviews — the moat a new listing must climb.