
The 10 Best Triathlon Watches in 2025
Multi-sport athletes are in a class of their own. As such, without smartwatches with functions that are dedicated to tracking full triathlons, it’s almost impossible to train and track your progress properly.
Unfortunately, it can easily get overwhelming trying to sift through the hundreds of smartwatch options out there to look for ones with the right suite of features to support you in your training and come at reasonable prices for the options they supply.
This list is for you! This is both a springboard to get you started in your search for a training companion and a comprehensive list that you could easily select your next watch from. So without further ado, let’s get right into making your life a little easier!
A Brief Guide to Triathlon Watches
As a dedicated athlete, choosing the right smartwatch for you can mean the difference between unlocking the next stage of your physical ability and ending up with a little contraption on your wrist that is more of a burden than a help. It’s important to know what you’re looking for and what will help you most as a competitor!
The most important option for any triathlon athlete is, of course, a multisport tracker built into your watch. Ideally, this should just be activated once, at the start of each training or competition, and then should automatically detect whenever you switch from one leg of the race to the next.
This will let you “set it and forget it” when you’re training or competing, keeping your watch present but hassle-free so that you get all the helpful analytics at the end and none of the fuss during the race. This is a must-have for any triathlon athlete!
Other key features that you should keep an eye out for aren’t quite as obvious (I promise). You’ll want to make sure the screen is bright enough, ideally an AMOLED, to be viewed while underwater if need be.
Along the same lines, the buttons should be leakproof and, as such, safe to use underwater. If you’re an ultratriathlon runner, you’ll need a long battery life, especially when using GPS to track your progress on the course.
The 10 Best Triathlon Watches
Whether you’re an ultra runner or not, whether you’re worried about having a full suite of customized training features or are ready with your own training plans, there’s something on this list for you!
I’ve curated a comprehensive list of the 10 best triathlon watches across all these considerations, which can either lead you to find your next dream watch or serve as a great springboard into your own research to find something that speaks to you even more. Let’s get right into it!
Garmin Enduro 3 – $800

The Enduro 3 is far from a cheap watch, but it’s also one of the best there is on the market at what it does. If you’re an ultra-triathlon or Ironman runner, this is without a doubt one of the first watches that you should be considering for training and for tracking your races.
In terms of training, you’ve got access to one of the best feature suites on the market today through Garmin, such as Garmin Coach and many built-in sports apps.
Energy monitoring, sleep coach, pulse oxygen, and heart rate are just a few more of the features that will really round out a comprehensive picture of your training and performance status.
Plus, perhaps most importantly for long-term racers, you get solar charging and up to 320 hours of battery life even with continuous GPS usage, or almost 3 months without GPS.
This watch will be a little difficult to wear at a 51mm diameter, but if you have the wrist for it, it will be a faithful and diligent companion through whatever endurance races you face.
Suunto Race S – $350

The Race S is a great option for shorter-distance runners who are looking for a more affordable tracker. It’s mostly limited to its battery life, which is 30 hours in performance mode with optimal GPS precision and 120 hours in tour mode, with active GPS but slightly lower accuracy.
With just normal daily use and the heart rate on, you get 9 days straight of use, so it’ll be a consistent help if you’re not wandering off the beaten path. Suunto also offers a great selection of training features, with AI workout supervision and feedback on training and recovery.
The S in the name simply refers to the smaller model, which is relatively wearable while maintaining a prominent screen size at 45mm. It’s a great affordable option that will definitely keep you at the top of your game for shorter-term races.
Garmin Forerunner 970 – $750

We’re back into the realm of more expensive top-of-the-line triathlon watches with this one, but every dollar here will be well spent. Like the name suggests, this watch is mostly targeted towards runners, but its massive suite of endurance features integrates perfectly with the triathlon suite too.
It automatically switches between each mode as you go through the race, making for easy hands-off tracking during the event. Like the Race S, ultratriathlon runners will be a little limited by the battery life of this watch, which is 26 hours in continuous GPS usage.
That said, its dozens of training features and analytics geared towards long-term activity will be a tremendous support for any runner. There are far too many of them to list here, so if this watch interests you, I’d take a look at the Garmin website for more information.
COROS PACE Pro – $350

From start to finish, COROS made their PACE Pro for multi-sport athletes, and it shows. With GPS active, you’ve got a considerable 31 hours of battery life, and that extends to 20 days in everyday use.
The training features aren’t quite as good as some of the others, as they’re mostly focused on building your own workouts or using a library of pre-made plans.
For professionals, this can be a major boon, but amateurs may struggle to develop a training program that leads to serious personal growth.
That said, the multiple features for pacing and training status monitoring, such as overall wellness and sleep quality, make for a great daily companion for the dedicated athlete.
Garmin Fenix 8 43mm – $900

When Garmin finally brought a brilliantly-lit AMOLED display to their Fenix series in the new 8 model, it immediately made for one of the greatest fitness smartwatches on the market today.
For example, while other watches can struggle with the swimming leg of a triathlon, the Fenix 8 was carefully built to be dive-rated thanks to its sealed buttons, which means you can even work it underwater.
The bright AMOLED screen, as well, will ensure you can see the watch while swimming. Automatic transitions between each sport in the triathlon mean that all you have to do is remember to start the race on your watch, and the Fenix 8 will run with you the whole way.
Once again, ultratriathlon runners may struggle with the battery life at 28 hours if the GPS is needed, but if that’s enough, the preloaded topographical maps will be a tremendously useful companion for your journeys.
Outside of just training, I’m also impressed by the watch’s recreational features, such as full dive capabilities (rated to 40m), golf tracking, ski resort maps, and boating info with tidal indication.
If you’re the type of athlete who loves to both train hard and take your rest time outside, staying active, the Fenix 8 is a great option for your wrist.
Apple Watch Ultra 2 – $799

There’s a reason that the Ultra 2 has found its way onto almost every list I do about smartwatches, no matter the specific criteria. It’s a watch that does almost everything exceptionally well, including triathlon training and performance.
However, you will struggle with the battery life for this one, as it’s only 36 hours in smartwatch mode and a weaker 17 hours of continuous GPS use. As such, the watch named Ultra actually makes for a poor companion for ultra athletes.
That said, its automatic detection of switching between each leg of the race is a really useful feature for shorter-race athletes, as is the bright screen and rapid processing power. More than the triathlon features, the Ultra 2 is also a great do-it-all watch.
It integrates perfectly with an iPhone and includes features for pretty much everything under the sun (as you’ll see in any number of my other smartwatch articles).
If you like to dabble in a bit of everything and are also looking for a smartwatch that does more than just fitness, the Ultra 2 is probably your best option.
COROS VERTIX 2S – $700

You know how I’ve been saying for most of these past watches, “be careful of this one if you’re an ultratriathlon runner”? Well, at long last, we have another true competitor for the Enduro 3, as the VERTIX 2S clocks in with a lovely 36 days of battery life in smartwatch mode and a whopping 118 hours of continuous GPS use.
If you’re out running or swimming in the middle of nowhere, you’ve got global offline maps to use with that GPS to ensure that you never get lost. It’s a watch built above all for adventure and traveling off the beaten path, thanks to its lightweight durable case and easy-access buttons.
Training features are some of the best available for intense endurance activity, as options like nutrition alerts and notifications about incoming storms keep you safe and protected as well as on top of your health.
It’s built for those who push themselves to the limits in terms of distance, but that means it’s also a great overengineered option for those who stay a little closer to home.
Polar Vantage M3 – $410

The Vantage M3 is a clean, elegant smartwatch designed to accompany multi-sport athletes who need a fusion of both outdoor and high-end sports functionality.
Or so, Polar is sure to tell you in their first few written lines about the watch—but I wouldn’t be paraphrasing that here if the watch didn’t have the functionality to back it up.
First, its 30 hours of battery life in performance training mode may not be the best on the market, but it is highly competitive for its price.
After examining that, the list of features is where you really start to see the watch shine: maps and dual-frequency GPS (using every GPS satellite system), skin temperature tracking, running power, swimming metrics, and specialized recovery programs are just a few of the most significant that caught my eye on Polar’s description.
Overall, the Vantage M3 is a mid-priced watch with top-of-the-line functionality. It may not seem at first glance like anything to write home about, until you realize that it offers almost as much as a $1,000 Garmin with about half the price.
COROS PACE 3 – $230

The PACE 3 is the immediate predecessor of the PACE Pro, but remains a powerhouse option in its own right. As the most affordable option on this list, you’d expect it to have the most limited suite of features, but you’d be wrong.
Its battery life already crushes the competition, even at higher price points, at 38 hours of continuous GPS and 15 days in smartwatch mode.
It’s designed for comfort, almost above all, as it weighs just 30g and strap options in silicone and nylon are perfect for exercise and won’t be abrasive or harmful to your skin.
It’s safe for swimming, and its list of sensors checks all the boxes: heart rate, pulse oxygen, compass, thermometer, gyroscope, and altimeter.
To be fair, it’s never going to be quite the daily companion that an Apple Watch would be, as most of its features are limited to fitness, but it does what it’s meant to do exceptionally well for an exceptional price.
Garmin Forerunner 265 – $350

Last but not least, the Forerunner 265 is another spectacular budget option that manages to not pull any punches in terms of training features.
Garmin Coach is still present, as well as analytics about each training session and indicators of your readiness for physical activity, like bodily energy monitoring. For triathlon competitors, it even still has the ability to switch between each leg of the race, so you can set it and forget it.
The battery life is acceptable for a watch of this price at 20 hours of GPS use, and the sensor array goes above and beyond by following pulse oxygen, stress levels, and VO2 Max, among others.
If you don’t need a several-page list of features to go with your smartwatch and are looking for something a little more affordable, the Forerunner 265 should be top of your list.
Conclusion
A smartwatch is a must-have these days for any dedicated athlete, and triathlon competitors are no different. A great watch can accompany you from training day to competitions and open up a whole world of analytics and training programs that would have been completely out of reach without this companion.
Yes, some options are expensive—but on this list, there’s an option for every budget and every training need. It’s time to unlock the maximum from your performance and be the best you can be.