Best Triathlon Watches

There was a time when running or sports watches could only offer time and heart rate, and offered little additional value.  But with the proliferation of GPS-enabled devices, modern triathlon watches are quite advanced in their offering and can help any athlete train with more precision.  These are true multipart watches that can be used in a number of workouts and races.

We will even take it a step further:  We think you need a good triathlon watch in order to train effectively.

For 2019, the watchmakers have turned the simple watches into complex fitness tracking tools.  They can tell you how far you’ve gone, how fast you are going, and even integrate with your bike’s power meter (if you have one).  These triathlon watches work in three different modes of swimming, running, and cycling. If you are running a triathlon and looking for a smart watch, you need to look for all these modes. Through comparing different watches available in the market, we have identified our four favorite watches for you.  Some are spendy, some are cheaper.  All are ones that we would recommend other triathletes.

4 Best Triathlon Watches

With no further adieu, here are our picks:

1.  Garmin Forerunner 920 

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garmin 920 triathlon watch

Our top Pick. The Garmin 920.

Let’s cut to the chase: The Garmin 920 is our favorite triathlon watch.  The Forerunner 920 is the best multipart watch on the market, in our opinion.  We love the features, the fit, and the design — it is much thinner than even its predecessor (the 910) and it a quantum leap from the old Garmins of several years ago.  With the ability to track all three sports, and to be in training mode for a whopping 24 hours, this watch is suitable for everyone all the way up to the serious Ironman triathlete.  If you want an even newer model, the Garmin 935 is like the 920 but with a few added features.


Many people complain that the sports watches available in the market are not comfortable to wear because of the larger size. Garmin Forerunner 920 is no different regarding size, but the larger size has an advantage as the buttons on front and side are easy to locate.


Any triathlon watch should be able to track your runs, rides, and swims accurately.  The 920 goes above and beyond and truly becomes a training buddy. It can monitor your average speed, heart rate, and regular alerts to keep your speed up, including predictions on what your finishing pace and time will be (something we don’t always use — it can be unnerving). It is also an excellent steps tracker and is smart enough to tell you how much fitter you are getting with time. In the water, it is a reliable partner in swimming with a very delicate GPS tracker, SWOLF tracker, and a length tracker. The length tracker helps you to calculate the number of times you have reached for each stroke in the water — something that can allow you to determine if your stroke is becoming more powerful and efficient over time. The SWOLF tracker helps to calculate the strokes each length is taking.

All Garmin products now come with Garmin Connect, the interactive app that allows you to track workouts and share with other users.  This is a nice feature if you have training partners who also use it — but for most people, more universal apps like Strava fit better, and are compatible with all kinds of devices.  We like Garmin Connect, but it is not a reason we would choose a Garmin.

One of our favorite features, though, is a calculator on how much rest time you should have based on your most recent workout — and if we have learned one thing, it is that most triathletes underestimate the importance of rest.  Incorporating a rest feature into the watch shows that Garmin truly understands the finer points of training.

2.  Tom Tom Multisport

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Tom Tom is a company that entered the sports market relatively recently.  They began making GPS devices for navigation, and are the trusted partner of companies such as Apple and Uber.  In the sports market, they are making their mark with the Multisport watch.  The greatest feature of TomTom Multisport is its innovative design and one-button usability. It can track all the three modes in a triathlon with simplicity. As tom tom triathlon watchcompared to the other sports watches, TomTom Multisport is less expensive, but may lack some of the accuracy in swimming mode.  This is a device that is really built for the bike and run legs.


The watch is designed to ensure comfort and performance at the same time. It has a large LCD with a single-button menu system. The screen is among the largest we have seen on the multisport market, but it is designed in a way that is not obtrusive.  The watch comes in a gray and dark pink color.


With the one-button control system, it becomes relatively easier to operate the watch as you don’t need to remember what button does what. Some watches are more complicated, not something you want when you are fatigue or quickly switching between sports.  The button acts as a D-pad, and you can operate the watch by simply scrolling within the menu. This watch is aimed at tracking your abilities during swimming, cycling, and running. It can work as a pedometer, calorie tracker, distance calculator, GPS-system, and stroke detection.  The swimming mode is useful for lap pool swims, but not ideal if your main swimming is done in open water.

3.  Polar M400 GPS Watch

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The M400 is a new class of fitness wearables combined with simplicity and high performance of expensive watches in a single device. It is polar M400 multisport watchsurprisingly functional and a great option for the fitness enthusiast buying their first proper running watch. The professional triathlon runners can use it well, but it lacks underwater heartrate monitoring and route navigation.  If what you need is accurate distance tracking and the ability to track multisport speeds, it is excellent.


Unlike the bulky triathlon watches, M400 is incredibly slim and light. Being less obtrusive than the other GPS-tracking watches, it looks perfect even on the skinnier wrists. The five buttons are smartly placed so that you can operate the watch without any stress.


The M400 is a perfect workout companion that functions as an activity tracker and fitness band. The watch has different modes depending on the activity you are performing, and particularly excels on the run leg. You can choose from “Aqua fitness” to “Yoga” and even “Classic Roller skiing.”  It is waterproof, but the company suggests that you not push buttons underwater and it is not meant to go far below the water surface.  One feature we like is the option of free training plans to be download to the watch, making it a true workout buddy.

4.  Fitbit Flex 2

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Fitbit Flex watch for triathlon

Fitbits are not often considered in the same league as Garmins and other sport-specific watches when it comes to multisport training, but the Flex 2 is worth a look.  Despite having no display and heart tracking, Fitbit Flex 2 is worth the compromise for many, and comes at a significantly lower price. Thanks to its band-like design and effectiveness even in the water, it is a basic tracker that multisport athletes can use for all three sports. It has a long battery life and sleeker design with the ability to track your all the activities and sleep. It is connected to your phone and shows all the activities through an application.

With the strong brand of Fitbit, and the likelihood of the Fitbit lineup growing in the future, it is intriguing for triathletes to think about building their training database on the Fitbit platform.  If you simply need something that can track your time and distance in the water, on the bike, and during the run, the Flex 2 fits that bill.

A very important distinction, though, is that the Flex 2 is not meant to be used to glance at your speeds and mileage within a workout — and that is exactly what many triathletes need.  Instead, it is a great tool for looking back at your workouts over time and understanding how your training has been trending.  It is also not going to be compatible with most power meters, if that is important to you.

Non-Swim Multisport Options

The devices listed above are all listed because of their ability to handle all three swims in a triathlon – the swim, the bike, and of course the run. It is always a bit of a debate on if it is necessary to use your watch on the swims, or simply save it for the bike and run.  It depends on how serious of a swimmer you intend to be, and how much open water swimming you plan to do (we find GPS watches of limited value in a pool).

If you are willing to not wear a watch in the swim and only track your cycling and running performance, your options open up considerably.  If you are not taking them in water, you can consider several more Garmin and Fitbit models, including the Fitbit Blaze workout watch.

Compatibility with Triathlon and Cycling Training Apps

Most watches are now more than just wearables — they also are compatible with some of the better training and fitness apps on the market.  That is important if you want to integrate all of your workout information into one, consolidated log.

Major manufacturers have their own platforms for tracking and planning your training, including Garmin Connect, Polar Beat, and Fitbit’s popular Fitbit Dashboard.  All will help you analyze your workouts, keep track of what you did and when, and help you share the information with others.

Some of the other apps to keep in mind that could be useful include:

  • Strava – the popular cycling and running workout tracker and community.  All of the watches recommended above demonstrate some level of compatibility with Strava.  We are huge fans of Strava, mainly because so many people are using it.  It is the network effect.
  • Smart Cycling Trainers The advent of smart bike trainers  has brought a sophistication to indoor cycling that did not exist before.  Many third-party apps, such as the one from Zwift, are able to sync with your Garmin, Polar, and other watch data for a complete analysis of your training.
  • Other Run Apps — Apps like Runkeeper and Runtastic are generally compatible with the data from your watch.  However, these apps are really meant to be used on your phone.

Final Thoughts on Tri Watches

The choice of a triathlon or multisport watch depends on your usage. If you are a professional, elite, or aspiring elite triathlete, or you just like knowing that you have the best gear out there, you should go with Forerunner 920. It has all the necessary features to help you during your training. For all the fitness enthusiasts not willing to spend quite as much, the other three watches are definitely good enough to provide training precision and some motivation on your runs, bikes, and swims.

Some may ask the question, “why not just use your phone as a tracker?”  We prefer a watch for a couple reasons.  First, it is built-for-purpose, and fits naturally on your wrist during even the hardest workouts.  Second, the right watch can be used on your swims — you would never do that with a phone.  Third, the battery life on a tri watch is far superior to that of your typical phone — a factor on your longer workouts or when starting out with less than a full charge.

This technology is changing so fast, though, and the peripherals you can use with the watches are in such rapid advancement, that we would consider this a ~2 year investment, and at that time you will probably be looking to upgrade.

We will be happy to see your thoughts

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