Best triathlon watches: Track your progress across all three legs

The best triathlon watches will let you track your swim, ride and run and easily transition between the three during a race. They're also a great tool to track your training and monitor your fitness.

The best smartwatches have become ever more sophisticated. Not only do they now give you more accurate tracking, with many following multiple GPS satellite constellations and offering multi-band GPS, but the fitness tracking tech has increased.

You can expect heart rate and pulse oximeter monitoring at a minimum. These allow your watch to offer you resting heart rate and heart rate variability monitoring as well as sleep quality assessment, stress and other metrics, giving you an in-depth assessment of your training and fitness 24/7.

For triathletes in training, these are fantastic features. The best watches for triathlon also track all three legs accurately and you can get seamless logging of transitions.

All this is achieved while still offering great GPS logging times, so you'll be ready for the longest events.

In this article, we’re going to tell you everything you need to know about the best triathlon watches. We previously covered the best cycling watches, as well as the best bike computers, but here, we are diving into the data-rich world of triathlon. 

Read on for our pick of watches for triathletes, or head to the bottom of the page for our guide to how to choose the best triathlon watch for your needs.

Best triathlon watches as chosen by our reviewers

Best triathlon watches

The Forerunner 965 is at the top of Garmin's Forerunner range and includes an AMOLED screen for a bright display and touchscreen interactivity that makes transitions really easy, with one touch switching between sports.  Despite this, it still manages up to 31 hours of GPS tracking. 

Garmin includes loads of health stats as well from training readiness scores and suggested workouts to reach your goals, to how well you've slept, with built-in HRM and PulseOx providing 24/7 monitoring and HRV analysis.

Also on board are colour maps with turn-by-turn directions, round-trip routing and PacePro race strategies as well as on-the-fly ClimbPro ascent profiles. You can also play tracks from the watch as you train and use Garmin Pay to speed up payments, leaving your cards or cash at home.

The Suunto Vertical builds on Suunto's robust, military-grade smartwatch functionality, adding dual-band GNSS tracking and solar charging for the titanium model, which allows it to offer a claimed 85 hours of battery life with full GPS tracking and 280 hours with single-band GPS. The lowest power Tour mode will go for a year between charges.

There's WiFi, full offline mapping, HRM, weather, a flashlight and all the fitness and health monitoring you'd expect from a premium smartwatch.

The colour touchscreen has increased in size to 1.4 inches and the resolution has increased to 280x280, although the response time isn't as quick as some competitors. The watch feels quite large as well. Suunto says that its manufacture is 100 per cent carbon compensated.

The shining feature of the Wahoo Elemnt Rival Multisport GPS Watch is its multiport handoff feature which allows you to seamlessly transition from swimming to cycling to running. No other watch in the triathlon space has this capability.

This watch will automatically detect when you’re transitioning to a new activity, and even transfer your data to a nearby device such as the Wahoo Elemnt Roam. In terms of convenience, this watch is arguably the best for triathletes. 

Unfortunately, the multisport handoff is the only standout feature of this watch. The rest is pretty average for this price point. and compared to some cheaper watches later in this list, you might want a few more features for this price. 

Tri Specific features of the watch aside, there is a range of pre-loaded activity profiles to choose from. The watch is stylish and we found the soft strap to be really comfortable for long periods. You can control a music playlist from the watch but track selection has to be done on your mobile. 

The Forerunner 255 does pretty much everything a triathlete needs, without the bells and whistles, although you can select a version with onboard music. There are also standard 46mm and small 41mm diameter formats to suit your wrist size and a range of colour options.

The display is a non-touchscreen colour memory in a pixel screen with 260 x 260 pixels. You can select which GPS networks to use, which results in tracking for a claimed duration of between 16 hours with all constellations and multi-band GPS for the highest accuracy and 30 hours if you just use single-band GPS GNSS. 

The 4GB onboard memory isn't the largest (the Forerunner 965 boasts 32GB), but it's adequate to store 500 songs in the version with music. There are also optical HRM and PulseOx sensors and you get the full suite of Garmin fitness and activity tracking and Garmin Coach functionality.

Coros says that it's upped durability with its second generation Apex 2 and Apex 2 Pro GPS watches, as well as updating the GPS antenna to the dual-band and increasing battery life to a claimed 75 hours of GPS tracking for the Pro model and 45 hours for the standard Apex 2.

Coros says that it's also improved the accuracy of the optical heart rate sensor. There's on-board training load and recovery tracking and HRV as well as structured workout building and example training plans to follow. Other useful features include a nutrition alert.

You can save yourself around a third of the price of the Pro by going for the standard version, which has a slightly lower res, smaller touchscreen. Both Apex 2 models sync over WiFi with the Coros app for more analysis.

This watch has got to be our favourite, and it will be yours too if you can afford it. Tipping the scales at around $800 / £750, the Garmin Fenix 7 Pro Sapphire Solar is the most capable watch on this list, with literally two pages of features to explore. It includes a touchscreen, making it easier to interact with, although this is switched off during exercise, so you won't change anything unintentionally.

The Sapphire Solar version gets a tougher screen and solar charging. In standard mode with all satellite systems running and multi-band GNSS, this will add around three hours to the claimed 20-hour runtime, assuming your event is somewhere sunny. 

But where the Fenix 7 scores is if you choose one of the lower power consumption GPS modes when Garmin claims that solar charging more than doubles the battery life to as much as 289 hours. There's also an expedition GPS mode that will extend that up to 74 days.

There's a range of specs with or without solar charging, with the Sapphire Pro Solar at the top of the tree. The Fenix 7 range is also available in three face sizes, a range of colours and four different strap options. 

Topo maps are included in the Fenix 7 Pro Sapphire Solar, which are maps specifically created for outdoor activities using OpenStreetMap. Of course, this watch comes with excellent GPS and navigation capabilities, as well as onboard music. There is also the PacePro feature, which can give you pace guidance based on your exact terrain. 

For long-course triathletes who spend many hours on long training sessions, the Fenix 7 Pro Sapphire Solar is a great fit. Its self-charging solar feature is unlike anything else, and you can easily go all day while using many of the watch's features – you can’t find that in any competitors. There's even a flashlight function.

The watch includes all the usual wireless connectivity capabilities, as well as optical heart rate measurement, and pulse oximetry. Designed for triathletes looking to take their long rides to the next level, look no further than the Garmin Fenix 7 Pro Sapphire Solar. 

Designed for experienced and long-course triathletes, the Polar Ignite 3 includes training, nutrition and exercise planning as well as lifestyle metrics and sleep tracking.  

The Ignite 3 has a 416 x 416-pixel AMOLED touchscreen and alongside the titanium version, there's a standard steel bezel option, which will save you some cash.

One feature that you can also find on the Polar Grit X is the power management feature designed for long-course triathletes and adventurers. Within these settings, users can optimize GPS recording, heart rate sensor readings, and screensaver settings to get the most out of their watch while also saving the battery. 

The plastic case and titanium bezel save weight and also improve GPS accuracy, which is excellent overall in the Polar Ignite 3. New watch face interfaces have been added, as well as the ability to control the music being played from an external device. There's a lot of extra planning and analysis functionality in the Polar Flow app as well.

The Fitbit Charge 5 is a lightweight, compact, affordable option to track your activity and, as with other Fitbit devices, it can also follow your fitness 24/7 and monitor your sleep. There's a bright AMOLED touchscreen that's easy to read, despite the device's size. There's in-built GPS, HRM and PulseOx as well as skin temperature monitoring, Fitbit Pay and BLE connectivity. 

The Charge 5 is waterproof to 50 metres, so it's good for the swim, although it's 5-hour claimed runtime when tracking activities might be a little low for longer events and training.

The design of the GPS antenna does mean that the Fitbit Charge 5 can't accurately monitor both your position and heart rate at the same time though.

Where the Polar Grit X Pro shines is in the data. This watch is among the best, with tons of wireless capabilities and super-accurate heart rate tracking. The Grit X Pro is built as the name suggests: strong and durable. It’s hard to find a non-titanium watch that can be beaten around as much as this, especially at this price point.

There are loads of data features not limited to just heart rate and GPS. You can also track your recovery and sleep, as well as read into your workout difficulty, all through the Polar Grit X Pro. Having both touchscreen and button navigation, you’d expect that this watch is easy to use – but not quite.

The Polar Grit X Pro’s UX isn’t the best, especially for a touchscreen smartwatch at this price point. The touchscreen can be slow to respond, which is especially frustrating when you are mid-activity and in need of some quick data or a GPS reroute. The other small downside is the watch's battery life, which isn’t all bad. The GPS life is actually quite good, listed at 40 hours. But the everyday battery life is only seven days, which is quite low relative to comparable smartwatches. However, it only takes an hour to fully recharge – so once again, it’s not all bad.

How to choose the best triathlon watch for you

When it comes to choosing a watch for a triathlon, all you need to know is this: choose a watch that provides everything you are looking for. 

If you are a long-distance triathlete, choose a watch that has long battery life. If you are a short-course triathlete, choose a watch that has the GPS and wireless capabilities you need, but not necessarily one with a long-lasting battery. 

If you want a watch to use for training and exploring more than racing, then choose a watch with great GPS capabilities, smart technology, the ability to play music, and emergency alerts. But if you’re a beginner looking to track your training for the very first time, go with a cheaper watch with basic GPS capabilities and without all the extras. 

There are a few watches loaded with extra features that – frankly – no one ever uses. If you are one of those select few who love diving into the data weeds, go right ahead. But know that it is going to cost you. 

Battery life and GPS capabilities are two of the more basic metrics that can help you determine which triathlon watch you need, whereas wireless connectivity is an important feature for most. Having a watch that continually measures your heart rate (and maybe some other metrics) throughout the day is a great feature for buyers looking for a watch that covers wellness in addition to athletics. With these features, you can better track your recovery and everyday activities. 

Overall, there are so many options out there when it comes to triathlon watches. There is also a huge price range that starts at less than $200 and goes to well over a thousand dollars. Think about what you will be using the watch for, and exactly what you need from it. You will be paying a premium for extra features, so make sure you’re going to use them before making your final purchase. 

To help you go fast, we've also covered the best triathlon shoes and the best triathlon saddles. 

 How we test the best triathlon watches 

We wore these watches 24/7 and tested them out in the wind, rain, heat, and everything in between. Some days we wore the watches in the pool or out on the open water, testing the GPS signal in more settings than one. 

In addition to the overall feeling of the watch, we tested as many of its features as we could (without breaking the watch, of course). And when we were all done with our activities, we left the watches turned on until their batteries ran out. Some watches took days and some took weeks.