Best Smartwatch With A Temperature Sensor In 2021

To save you the struggle, Garmin Fenix 6 Pro is the best watch with a relatively accurate body temperature sensor. But be prepared, it is going to break the bank. 

Let’s get started with the post.

Smartwatches with a temperature sensor or a thermometer are few and far between. Almost always, these watches have other tactical features like Altimeter, Barometer, and Compass. 

Made for outdoorsmen, these rugged smartwatches are chunky and heavy. 

The temperature sensor technology inside the watch is evolving, and up til now, they are not very accurate. Nevertheless, the body temperature sensor watches we have added here are better than the rest of the lot. 

Even if these watches show readings that are a little off, they give you important insights into the rising and falling trend of your body temperature. Also, if you take off the watch, and tie it to your backpack or bike, you get a somewhat accurate measurement of outside air temperature.

Also, you can pair an external temperature sensor with these watches to get the most accurate data of the surrounding air.

Anyways, it is always handy to have all important sensors in a single watch than carrying two or three devices to track the body (heart rate, sleep, calories burnt, ECG)  and environmental metrics (direction, altitude, and temperature)

So without further ado, let’s get straight to our first pick. 

Watches With Temperature Sensor: Comparison Table

Smartwatches With Temperature Sensor in 2021:

Garmin Fenix 6X Pro: Best Smartwatch With Body Temperature Sensor

$749.99
$619.89
 in stock
28 new from $619.89
3 used from $636.99
Free shipping
Amazon.com
as of March 6, 2021 3:03 pm

Garmin Fenix 6X Pro key features:

  • Works with iPhones and Android phones
  • 51mm case
  • Interchangeable bands
  • 10ATM waterproof rating (Water-resistant for up to 100m)
  • Topographical maps
  • Built-in music player
  • Garmin Pay
  • Heart rate monitor
  • Up to 60 hours GPS battery life
  • Altimeter, Barometer, and Compass
  • Heart rate and SpO2 sensor

Two Minute Review:

First thing first, this watch will scare you off with its hefty price tag.

Is it worth spending money?

It depends on your preferences in a smartwatch.

Provided that money is not a problem, there are still other things to look for.

If you are looking for a multisports GPS smartwatch, this is the right watch for you; if you are looking for a durable watch, this is the right watch for you; and finally, if you are looking for a trekking companion, again, this is the right watch for you. 

Keep in mind, this is a chunky watch that won’t go under the sleeve. Suitable for big wrists, this durable watch is made for men’s physique. 

The smartwatch is the right mix of smartwatch, health, and sports features. In a sense, it is a complete watch having the most important features for all kinds of activities.

You want to go on a trekking or hiking spree, no problem. This watch will give you a storm alert, tell you direction, help you navigate through tough terrains with its heat maps and TOPO map, will tell you how hot or cold is outside temperature with its onboard sensor. 

You want to give its health features a spin. The optical heart rate tracker on board will give you the most accurate data of your heart rate, and calories burn. The pulse OX will help you keep close tabs on your blood oxygen saturation. 

The battery life of the smartwatch is consistent with the claims of the manufacturer company. Garmin claims that it will give three weeks of use as a smartwatch, up to 3 days of GPS, up to 15 hours of GPS and music, 120 hours in max battery mode, 46 hours in expedition mode, and 80 days in battery saver mode.


POLAR Grit X - Best Garmin Alternative With A Temperature Sensor

$429.95
$408.90
 in stock
11 new from $408.90
Free shipping
Amazon.com
as of March 6, 2021 3:03 pm

Key Features:

  • 47mm diameter, the stainless steel casing isn’t chunky or cumbersome
  • Works with iPhones and Android phones
  • Max GPS-battery life to 40-hours
  • 10ATM waterproof rating (Water-resistant for up to 100m)
  • 64 g with the wristband, 44 g without a wristband.
  • Display Size 1.2”, resolution 240 x 240
  • Integrated GPS, GLONASS, Galileo, QZSS.
  • Tested against military standards (MIL-STD-810G)
  • Compatible with standard 22 mm quick release watch bands

Two Minute Review:

Can’t Afford Garmin Fenix 6X pro? Or Its features are overkill for you?

No problem. Polar has an alternative for you in Grit X.

This watch has your required temperature sensor, but it doesn’t end there.  It is packed with a range of powerful features for you.

But first, we should go through the built quality. 

The GPS watch has a reinforced fiber casing with a metallic ring and gorilla glass protected display. It is a military standard approved for shock, water, and dust resistance. Like Fenix 6X pro, the top dog when it comes to ruggedness, this smartwatch is 10 ATM rated. In layman’s terms, it is resistant to water for upto 100m.

Moving next to GPS connectivity, it seamlessly connects to multiple satellite navigation network to give you an accurate track of your position. Unfortunately, there is no offline map support, but you can plan your route online and then sync the watch with the Polar web service, and you’ll have a trail to follow right on your wrist.

Other than the temperature sensor, it has an onboard compass and altimeter for outdoor adventures. The watch is also packed with several features for outdoor adventurers, which include, Fuelwise, Komoot route guidance, and Hill splinter.  Besides this, you have intervals, timers, and race pace options.

The battery life isn’t as impressive as that of Fenix 6X pro, but still, it is considerable.  The 346mAh, average-size, the battery is good for up to 40 hours of GPS-enabled tracking or 7 days of timekeeping with continuous heart-rate monitoring. 

Lastly, the smartwatch might have top-line features for runners or outdoor enthusiasts, and even if it is affordable than the Fenix 6X, we won’t recommend this one if all you need from a watch is a decent body temperature sensor. 


Fitbit Sense: Best Fitbit

$329.95
$298.95
 in stock
12 new from $298.94
Free shipping
Amazon.com
as of March 6, 2021 3:03 pm

Key Features:

  • Weighs just 1.7 ounces, lightweight when compared to other watches on this list
  • Fitbit OS, clutterless and easy to navigate
  • 1.58-inch OLED display (336 x 336 pixels) 
  • 6 Days battery life
  • GPS and GLONASS
  • Contactless payment (Fitbit Pay), plus Bluetooth connectivity
  • 5 ATM water-resistant, remains intact for up to 50 m. 
  • Two voice assistant well integrated: Alexa, Google Assistant
  • Sensors: Blood oxygen sensor, Electrical heart sensor, optical heart sensor, Accelerometer, Ambient light sensor, skin response sensor, Gyroscope, Altimeter

Two Minute Review:

Fitbit Sense is an altogether different watch than Fenix 6X pro and Polar Grit X.

It is the company’s first health watch. Fitbit has tried to rebrand it along the line of health and fitness, the core of Fitbit business.

Fitbit Sense is the first FDA-approved ECG watch by the company, and till now, is counted among the pioneers of ECG sensors.

Being a health watch, it is packed with a number of biometric sensors. Besides ECG, it has a blood oxygen sensor, heart rate sensor, accelerometer, and skin response temperature sensor. 

However, there is a major caveat.

The skin temperature sensor only activates at night and gives you the trend of the temperature changes once you wake up. You can’t track the skin temperature in real-time. But the first part is, you will have no control over the sensor which means you can’t use it during the day.

Other than the skin temperature sensor, Fitbit sense has an altimeter like Apple Watch Series 6. The altimeter tells you the altitude quite accurately. Whereas, a blood oxygen sensor informs you about the trends in the saturation of oxygen in the blood so you keep close tabs on the health of your lungs.

Let’s move away from its fitness features.

The watch has a decent display, pretty large but not chunky. The AMOLED screen is the gold standard of screen technology in wearables. The watch is fairly rugged, 5 ATM rated for resistance against water plus reinforced screen for resistance against scratches.

You should buy Fitbit Sense only if you are interested in an active lifestyle, live-saving bio-tech like ECG and Blood oxygen tracking, and not for an inaccurate, limited skin temperature sensor. 


Samsung Galaxy Watch Active 2: Best Affordable Watch With Temperature Sensor

$249.99
$199.00
 in stock
6 new from $199.00
23 used from $124.99
Free shipping
Amazon.com
as of March 6, 2021 3:03 pm

Key Features and Specs:

  • eSIM: Yes
  • Size: 44 mm Version
  • Weight: 42 g (1.48 oz)
  • OS: Tizen by Samsung
  • Display: 1.4″ AMOLED / 60 x 360 / 328ppi /Always-on Display
  • Storage & Memory:  4GB , 1.5 GB 
  • Battery Life: 20-50 hours
  • GPS: Yes with  A-GPS, GLONASS, GALILEO, BDS
  • NFC: Yes
  • Water Resistance: 5 ATM  IP68 + Military Grade 8100

Two Minute Review:

Samsung Galaxy Watch Active 2 is remarkable in many aspects, and an on-board temperature sensor isn’t only a highlight. 

Active 2 is called swiss army knife for a reason. The watch combines the right set of health and smartwatch features. 

For instance, it has the latest FDA-approved ECG feature, SpO2 sensor couple with the old optical heart rate and sleep tracking sensor.

In smartwatch features, it allows you to make calls without a phone, send texts, and emails. Other than that, you can make contactless payments via Samsung pay. You have a voice assistant in the form of Bixby and can stream music and podcasts on the smartwatch. 

The watch has an altimeter, barometer, and closely linked thermometer sensor with it. The temperature sensor is not for tracking body temperature but the temperature of ambient air and correcting the altimeter readings.

The smartwatch has military standard certification so it is rugged to an acceptable degree. 5 ATM rated, the smartwatch can withstand water for up to 50 m, and has a high resistance against dust. 

Speaking of the display, it features a high-resolution AMOLED display. The rotating touch screen bezel is the standout feature of the watch. 

If you are looking for a well-rounded smartwatch that offers bells and whistles without charging a heavy price for it, Samsung Galaxy Watch Active 2 is the right pick for you. For the features it is offering, the smartwatch is highly affordable. You can take our words for it, Active 2 offers the best value for the money.

Smartwatches With Temperature Sensor: FAQs

Garmin Fenix Watch Changes Temperature during Workout?

The temperature sensor isn’t very accurate in all smartwatches, let alone Garmin Watches.

The temperature sensor is linked with the altimeter, and therefore dependent on the airflow. In the first few minutes of workout or running, the airflow carries the heat away from the body, and therefore, the temperature drops. This accounts for the fluctuations of temperature reading during workouts

Can We Use The Fitbit Sense Temperature Sensor During The Day?

In a single word, no.

Fitbit needs you to be still while it takes skin temperature measurement and that is only possible when you are asleep. Also, you need a premium subscription to the Fitbit account to get access to your Sleeping data.

Do The Samsung Watches Has A Temperature Sensor?

Yes, the latest version surely has a temperature sensor coupled with the barometric sensor.

.Both the Galaxy Watch Active 2 and Samsung Galaxy Watch 3 have a temperature sensor.