---
title: "Porthole Window — $48K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/home-kitchen/porthole-window"
last_updated: "2026-08-06T04:53:47.049Z"
locale: en
meta:
description: "Niche score 50/100 · $48K/yr market · 87K searches/yr · $53.93 avg price. A small market ($48K/yr) keeps it on the watch list. Data updated Aug 2026."
"og:description": "Niche score 50/100 · $48K/yr market · 87K searches/yr · $53.93 avg price. A small market ($48K/yr) keeps it on the watch list. Data updated Aug 2026."
"og:title": "Porthole Window — $48K/yr Amazon US Niche (2026) - Flapen"
---
# **porthole window**
**Worth a look**
Shows a thin review moat (101 avg reviews), but a small market ($48K/yr) keeps it on the watch list.
Market size 12Growth 42Conversion 13Competition 84Returns 35Price range 53Avg price 92Brand share 53Review moat 95Quality gap 76
**Review moat**
**Great****100.73**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Great****$53.93**
avg listing price — sweet spot $15–$100
**Competition**
**Great****31%**
top-5 click share — an open shelf
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Brand share**
**Good****73%**
top-5 brand share — brands hold most of the demand
**Price range**
**Good****$6.16–$166.41**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+13.4%**
90-day search growth — must beat 0% to launch
**Returns**
**Okay****4.2%**
return rate — above 5% kills the launch gate
**Conversion**
**Bad****1.0%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****$48K**
$48K/yr · 87K searches
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
According to Flapen's Amazon United States niche tracking, porthole window is a $48K/yr Amazon United States market (87K searches/yr). The top 5 brands hold 73% of demand. Verdict: Worth a look — 50/100.
Data updated Aug 2, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **porthole window market data**
- **Units sold / yr**
- **750–1K**
- avg 0–100/product
- **Revenue / yr**
- **$40K–$54K**
- units × avg price
- **Conversion rate**
- **1.0%**
- **Avg BSR**
- **#2,185**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **83%**
- **Out of stock**
- **17.5%**
- **Avg brand age**
- **42 months**
- **Avg seller age**
- **182 days**
## **Competition & brand share**
Clicks spread well past the top 5 (31% combined) — an open shelf where new products get seen.
**Brands**
**23 **▲rising
**Sellers**
**47**
**Top-5 brand share**
**73%**
Top 20: 98%
**Top-5 click share**
**31%**
Top 20: 69%
**Open market**
**23%**
- Nagina International29% - THE ANTIQUE HOUSE17% - Amarine Made13% - inanosa9% - The Metal Magician5% - Creative Co-Op4%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +13.4% search growth over the last 90 days.
3K2KHoliday '24Spike '25 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/home-kitchen/porthole-window/trend)
## **Top porthole window search terms**
- **porthole mirror**20K/yr+20.7%0.7% conv. - **porthole window**18K/yr+2.2%0.7% conv. - **porthole**15K/yr+41.2%0.3% conv. - **boat window**9K/yr+17.0%0.2% conv. - **porthole picture frame**8K/yr+1.3%0.3% conv. - **port hole wall decor**4K/yr+35.9%0.7% conv. - **port hole**4K/yr+11.8%0.7% conv. - **port holes window**5K/yr-22.1%0.7% conv. - **porthole windows**3K/yr-10.8%0.3% conv. [**All search terms **](https://flapen.com/research/us/home-kitchen/porthole-window/search-terms)
## **Top porthole window 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%3%$1K6%$3K9%$4K12%$6K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Antique Transparent Porthole 9 Inches Round Window Clear Glass Nautical Window Ship Porthole**THE ANTIQUE HOUSE**$39.52**4.0★34 rev](https://www.amazon.com/dp/B0BT9XW77G) [2**Nagina International Powder Coated Premium Nautical Aluminum Pirates Ships Porthole Window | Exclusive Wall Decor Accent (8 Inches Antique Brass)**Nagina International**$32.62**3.7★11 rev](https://www.amazon.com/dp/B01MZF5LTB) [3**The Metal Magician 12inch Nautical Decor Porthole Wall Mirror Polished Brass Mirror for Home Pirate Decor Shipwrecked Victorian**The Metal Magician**$72.09**4.7★38 rev](https://www.amazon.com/dp/B0C6ZLQ5YN) [4**Nagina International 12 Nautical Nickel Plated Premium Ships Porthole Mirror | Maritime Wall Decor Plane Mirror**Nagina International**$27.94**4.4★140 rev](https://www.amazon.com/dp/B01N667TDX) [5**Antique Brass 9 Inch Mirror Porthole Wall Hanging Nautical Home Decorative Gift**THE ANTIQUE HOUSE**$38.51**4.2★26 rev](https://www.amazon.com/dp/B0BHL3F44B)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Viozakanry 6 Styles Large Nautical Porthole Cutouts 11 Inches Double Printed Cabin Scenery Nautical Accents Anchor Sailboat Lighthouse Beach Lifebuoy Seagull Decor for Bulletin Board Party Supplies**Viozakanry**$12.57**21 rev1y ago](https://www.amazon.com/dp/B0F6V3S1CD) [**Oil Rubbed Antique Bronze Finish Vintage Style Functional Porthole Window | Stylish Home & Wall Mounting Decor | Wall & Door Fixture (Transparent Window Glass) (12 Inches)**Nagina International**$41.83**1 rev2y ago](https://www.amazon.com/dp/B0D4R6RKXH) [**inanosa 10 Inch Antique Brass Porthole Mirror Boat Frame Port Hole Decor Vintage Nautical Ship Mirror for Coastal Wall & Antique Decor**inanosa**$47.24**60 rev3y ago](https://www.amazon.com/dp/B0CCY5VSB2) [**inanosa 8 Inch Brass Porthole Window Small Round Nautical Wall Window Antique Brass Ship Porthole for Coastal & Vintage Decor**inanosa**$33.80**3 rev3y ago](https://www.amazon.com/dp/B0CCY5GC3Q) [**The Metal Magician 12inch Nautical Decor Porthole Wall Mirror Polished Brass Mirror for Home Pirate Decor Shipwrecked Victorian**The Metal Magician**$72.09**38 rev3y ago](https://www.amazon.com/dp/B0C6ZLQ5YN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**inanosa 20 Inch Nautical Wall Window Large Brass Porthole Window Nautical Wall Art Ship Decor Antique Brass Round Porthole with Clear Glass for Coastal & Sailing Dcor**inanosa**$124.38**2.5★**▲ 196%**](https://www.amazon.com/dp/B0C59FPWKX) [**SEAFLO Round Porthole Window with ABS Plastic & Tempered Glass for Boat Yacht Marine Applications (White 10.5)**SEAFLO**$43.97**5.0★**▲ 104%**](https://www.amazon.com/dp/B07F2P917X) [**Viozakanry 6 Styles Large Nautical Porthole Cutouts 11 Inches Double Printed Cabin Scenery Nautical Accents Anchor Sailboat Lighthouse Beach Lifebuoy Seagull Decor for Bulletin Board Party Supplies**Viozakanry**$12.57**4.3★**▲ 85%**](https://www.amazon.com/dp/B0F6V3S1CD) [**Nagina International Powder Coated Premium Nautical Aluminum Pirates Ships Porthole Window | Exclusive Wall Decor Accent (8 Inches Antique Brass)**Nagina International**$32.62**3.7★**▲ 83%**](https://www.amazon.com/dp/B01MZF5LTB) [**inanosa 8 Inch Brass Porthole Window Small Round Nautical Wall Window Antique Brass Ship Porthole for Coastal & Vintage Decor**inanosa**$33.80**2.5★**▲ 80%**](https://www.amazon.com/dp/B0CCY5GC3Q)
**~~View all trending →~~**
## **What buyers say about porthole window**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**18%
*“Very good quality”*
**Value For Money**14%
*“Good value for a one-sided porthole”*
**Fun/Entertainment Experience**9%
*“Fun Addition for Dogs — Easy Install and Clear Visibility”*
**Pet Friendly**7%
*“My dog loves it”*
**Strength**6%
*“Sturdy”*
**Gifting Purpose**6%
*“Great gift”*
**Design-Overall**5%
*“the unit is attractive”*
**Assembly/Installation**4%
*“Super easy to install”*
**Adhesion/Stickiness**4%
*“Ties the room together”*
**Ease Of Use**4%
*“Help me find my room easy”*
### **What buyers complain about **
**Size-Overall**42%
*“I just couldnt find the right size”*
**Advertised Vs Actual Product**25%
*“So don't advertise as such”*
**Instructions/User Manual/Troubleshooting**17%
*“But no instructions”*
**Defective Material/Parts**8%
*“Missing parts”*
**Mounting**8%
*“Item was missing the nuts required to secure bolts”*
### **Top return reasons **
**Size-Overall**48%
**Advertised Vs Actual Product**10%
**Quality-Overall**6%
**Color**5%
**Value For Money**4%
**Defective Material/Parts**3%
**Compatibility-Overall**2%
**Paint Quality**2%
**Windshield Issues**2%
**Functionality-Overall**2%
## **Common questions**
- **Is porthole window profitable to sell on Amazon United States?**
- The niche generates $48K/yr across 52 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is +13.4%. Flapen's verdict: Worth a look (50/100).
- **How competitive is the porthole window niche?**
- 23 brands and 47 sellers compete. The top 5 products take 31% of clicks and top 5 brands hold 73% of demand.
- **What do buyers complain about in porthole window?**
- Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Instructions/User Manual/Troubleshooting. The return rate is 4.2%.
- **When does demand for porthole window peak?**
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- **What does it cost to enter the porthole window niche?**
- Listings span $6.16–$166.41; the average listing price is $53.93 (sweet spot $15–$100). The average incumbent carries 101 reviews — the moat a new listing must climb.
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