Is water thermometer for cold plunge profitable to sell on Amazon United States?

The niche generates $85K/yr across 17 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +1.5%. Flapen's verdict: Worth a look (58/100).

How competitive is the water thermometer for cold plunge niche?

15 brands and 20 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 66% of demand.

What do buyers complain about in water thermometer for cold plunge?

Top complaints mined from reviews: Durability, Measurement/Reading Accuracy, Functionality-Overall. The return rate is 1.0%.

When does demand for water thermometer for cold plunge peak?

Demand peaks in Jan–Nov–Dec; the busiest month runs 3.9× the quietest.

What does it cost to enter the water thermometer for cold plunge niche?

Listings span $8.13–$29.23; the average listing price is $13.64 (sweet spot $15–$100). The average incumbent carries 854 reviews — the moat a new listing must climb.

water thermometer for cold plunge

Worth a look

Shows beatable incumbent ratings (4.0★), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Quality gap

Incredible4.0★

avg incumbent rating — lower means beatable quality

Conversion

Great11.8%

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

Returns

Great1.0%

return rate — above 5% kills the launch gate

Price range

Good$8.13–$29.23

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

Review moat

Good854.24

avg incumbent reviews — the moat a new listing must climb

Brand share

Good66%

top-5 brand share — brands hold most of the demand

Avg price

Good$13.64

avg listing price — sweet spot $15–$100

Competition

Okay61%

top-5 click share — leaders hold, buyers still browse

Growth

Okay+1.5%

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

Market size

Bad$85K

$85K/yr · 53K searches

Signals Low Review Barrier Quality Gap

According to Flapen's Amazon United States niche tracking, water thermometer for cold plunge is a $85K/yr Amazon United States market (53K searches/yr). The top 5 brands hold 66% of demand. Demand peaks in Jan–Nov–Dec. Verdict: Worth a look — 58/100.

Data updated Jul 16, 2026 · scored weekly · How we score niches

water thermometer for cold plunge market data

Units sold / yr: 6K–8K; avg 250–500/product
Revenue / yr: $82K–$109K; units × avg price
Conversion rate: 11.8%
Avg BSR: #123
Page quality: 0%
Prime: 94%
Sponsored: 82%
Out of stock: 27.8%
Avg brand age: 42 months
Avg seller age: 176 days

Competition & brand share

The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 falling

Sellers

Top-5 brand share

66%

Top 20: 100%

Top-5 click share

61%

Top 20: 100%

Open market

28%

Suoimk23%
PRASBURR16%
Keystone Peak12%
Zuprime8%
TempPro7%
Unipool6%

Demand & seasonality

Weekly Amazon search volume, last 102 weeks — +1.5% search growth over the last 90 days.

Peak months: Jan, Nov, Dec · busiest ÷ quietest = 3.9×

Open Trend

Top water thermometer for cold plunge search terms

cold plunge thermometer22K/yr +3.1%11.6% conv.
ice bath thermometer16K/yr -3.5%9.9% conv.
floating thermometer for ice bath8K/yr +3.0%7.4% conv.
cold plunge thermometer floating4K/yr +13.7%13.1% conv.
cold plunge timer3K/yr -3.8%5.0% conv.

All search terms

Top water thermometer for cold plunge 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Silicone Cover Ice Bath Thermometer with Timer Waterproof Floating Water Thermometer for Cold Plunge Works with Ice Bath Tub Hot Tub Accurate Recovery(Black)

Suoimk$20.884.2★298 rev

Pool Thermometer Floating Easy Read Leisurely Polar Bear Water Thermometer for Ice Bath with String for Outdoor & Indoor Swimming Pools Spas Hot Tubs & Aquariums

PRASBURR$11.164.6★323 rev

Pure55 PlungeGauge 3-in-1 Cold Plunge Thermometer with Clock & Timer - Ice Bath Water Thermometer with Easy 3-Button Control - Floating Design & IPX7 Waterproof with Audible Beep & LED Indicators

Zuprime$17.893.6★11 rev

TempPro Waterproof Wireless Pool Thermometer Easy Read Digital Pool Thermometer Floating for Swimming Pool Hot Tub Cold Plunge Pond Upgraded IPX8 Water Temperature Monitor (Previously ThermoPro)

TempPro$29.234.3★1,692 rev

Floating Pool Thermometer Large Display with String Easy to Read Shatter Resistant for Outdoor & Indoor Swimming Pools Spas Hot Tubs & Aquariums (Turtle)

Unipool$8.254.4★1,819 rev

Newest

by launch date

Ice Bath Water Thermometer and Timer LED Large Backlit Cold Plunge Thermometer IPX68 Waterproof Floating USB & Solar Charging for Hot Tub & Ice Bath Tubs Included USB Cable Included

WAKHZCM$18.648 rev

3mo ago

Ice Bath Thermometer and Timer - Waterproof Floating Thermometer for Ice Bath & Pool - Patented Design with Accurate Reading & Improved Sealing - White

Keystone Peak$12.0459 rev

6mo ago

Pool Thermometer Floating Water Temperature Thermometer with String Large Size Easy Read & Shatter Resistant Pool Accessories for Outdoor & Indoor Swimming Pools Spas Hot Tubs & Aquariums.(White)

Inpool$9.23747 rev

8mo ago

2 in 1 Cold Plunge Thermometer Ice Bath Thermometer Floating Easy Read IP67 Waterproof Timer and Digital Temperature Gauge Timer (Black)

KILEEP$19.1940 rev

12mo ago

Pure55 PlungeGauge 3-in-1 Cold Plunge Thermometer with Clock & Timer - Ice Bath Water Thermometer with Easy 3-Button Control - Floating Design & IPX7 Waterproof with Audible Beep & LED Indicators

Zuprime$17.8911 rev

1y ago

What buyers say about water thermometer for cold plunge

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

What buyers love

Quality-Overall15%

“appears well made”

Ease Of Use14%

“Easy and Convenient”

Advertised Vs Actual Product13%

“As advertised”

Value For Money11%

“Worth the investment”

Assembly/Installation9%

“set up quickly”

Measurement/Reading Accuracy8%

“Works well and seems to be accurate”

Water Resistance3%

“Its waterproof”

Durability3%

“It is durable”

Temperature Control2%

“The temperature readings appear accurate”

Functionality-Overall2%

“A very useful addition to my hot tub instrumentation”

What buyers complain about

Durability29%

“Broke quickly”

Measurement/Reading Accuracy12%

“Very poor accuracy”

Functionality-Overall8%

“Doesn't work”

Quality-Overall7%

“Complete garbage”

Size-Overall6%

“Large is a joke”

Battery Life4%

“Thought it may be low battery yet no indicator”

Heating3%

“We've been having trouble with the heater for our spa”

Water Resistance3%

“Not Waterproof”

Ease Of Use2%

“because it will be extremely difficult to get them back out”

Leak-Proof2%

“Leaks”

Top return reasons

Measurement/Reading Accuracy31%

Functionality-Overall18%

Heating10%

Size-Overall7%

Advertised Vs Actual Product5%

Defective Material/Parts5%

Value For Money4%

Connectivity-Overall3%

Durability2%

Product Condition2%

Common questions

Is water thermometer for cold plunge profitable to sell on Amazon United States?: The niche generates $85K/yr across 17 tracked products. 1 of 4 products launched in the last 360 days are still selling. 90-day search growth is +1.5%. Flapen's verdict: Worth a look (58/100).
How competitive is the water thermometer for cold plunge niche?: 15 brands and 20 sellers compete. The top 5 products take 61% of clicks and top 5 brands hold 66% of demand.
What do buyers complain about in water thermometer for cold plunge?: Top complaints mined from reviews: Durability, Measurement/Reading Accuracy, Functionality-Overall. The return rate is 1.0%.
When does demand for water thermometer for cold plunge peak?: Demand peaks in Jan–Nov–Dec; the busiest month runs 3.9× the quietest.
What does it cost to enter the water thermometer for cold plunge niche?: Listings span $8.13–$29.23; the average listing price is $13.64 (sweet spot $15–$100). The average incumbent carries 854 reviews — the moat a new listing must climb.