We wade through the e-weeds to find the best watches for tri.

There used to be a time when the absolute best triathlon watch was the Timex Ironman. Remember that one? So many triathletes bought it simply because it was our watch—it said so right in the name. Don’t worry, Timex’s tried-and-true start/stop/lap/time workhorse still exists, but now we’ve got smartwatches more powerful than a 15-year-old home computer.

Today’s best triathlon watches do heart rate with or without a strap, run pacing, mapping, bike functions, tri functions, brick workouts, smartphone notifications, open-water swimming, run power, and way way way more—heck a few of these marvels of modern technology can even act as a de facto coach and training partner. (Some also act like they require a computer science degree to use.)

But not all watches are created equal, and not all are the best watches for triathletes. While some do running super well, their biking functions are an afterthought; while many of today’s smartwatches do pool swimming at least reasonably well, only a few handle the open water with ease. Want to use your watch all day for race day? Yes, there’s a watch for that, but if you go super long, the list gets even shorter.

Below we’ve broken down some of the best triathlon watches in a wide range of prices—whether you want ultra simple, like the Timex Ironman, or something that could potentially drive your Tesla remotely (with a future software update, of course).

Garmin Forerunner 945

Starting at $600best triathlon watches

Tri Functions

Running, Cycling, Open-Water Swimming, Multisport

TL;DR

Does all the things always, but you might need to take out a second mortgage

Best Triathlon Watch: Why It Makes the Cut

I did a video review of this one recently, and I used it again at the Santa Barbara Tri in August for my video training diary. This is the watch you get and use until you lose it or break it or someone swipes it from you. Honestly, I would be hard pressed to even imagine what else Garmin could pack into a new model–the Forerunner 946 or the Forerunner 955 or whatever comes up next. Without giving a 10,000-word diatribe on what this thing can do, I’ll hit the tri highlights on why this is one of the best triathlon watches (bonus: it’s very small):

Claimed battery life:
Smartwatch Mode: Up to 2 weeks
GPS Mode with music: Up to 10 hours
GPS Mode without music: Up to 36 hours

Suunto 5

best triathlon watches

Starting at $330

Tri Functions

Running, Cycling, Open-Water Swimming, Multisport

TL;DR

High-end features, mid-range price

Best Triathlon Watch: Why It Makes the Cut

Suunto’s mid-range multisport offering is one of the best triathlon watches because it packs all of the ultra high-end features of something like the Forerunner 945 into a great watch at almost half the price. While no one can argue that $330 is cheap, it certainly doesn’t require a visit with your accountant. The big win with this bigger-sized watch is getting the host of Suunto preloaded activities (it’s a lot) alongside their renowned accuracy. While the interface isn’t as infinitely expandable via updates and apps as the Garmin, or as compatible with external sensors, for those who don’t like to get waist-deep into the intricacies of training minutiae, this is best triathlon watch for the middle ground. The only big caveat? The Suunto 5 is NOT ANT+ compatible, so check to be sure your external devices work with Bluetooth. The big multisport mentions:

Claimed battery life:
Smartwatch Mode: Up to 2 weeks
GPS Mode: Up to 40 hours, depending on settings

Polar Vantage M

$280, Polar.com

Tri Functions

Running, Cycling, Open-Water Swimming, Multisport

TL;DR

Crazy amount of value, price sweet spot for triathletes

Best Triathlon Watch: Why It Makes the Cut

As someone who’s used this watch for a while, I’m still amazed that Polar can price one of the best triathlon watches for under $300. It’s bigger brother, the Vantage V, is still a killer watch with great value for built-in running power and a touchscreen at $500, but the Vantage M is a high-tech sleeper. For about the cost of a tri entry (ugh), you get a fully-featured multisport watch with a shocking battery life and a footprint (or wristprint?) that is light and manageable. In fact, ladies should take note as the Vantage M gets high marks on the “cuteness” scale from my lovely wife. There’s not much to dislike about this watch except that the smartphone notifications are a recent add that are still a little buggy and the GPS accuracy for speed/distance is not nearly as pinpoint as the Garmin or Suunto (but the built-in heart rate is arguably better, per Polar’s area of expertise). The major tri highlights:

Claimed battery life:
Smartwatch Mode: Up to 2 weeks
GPS Mode: Up to 30 hours, depending on settings

Coros Apex

Starting at $300

Tri Functions

Running, Cycling, Open-Water Swimming, Multisport

TL;DR

Up-and-comer with some unique features, a sleek design, and insane battery life

Best Triathlon Watch: Why It Makes the Cut

Though many triathletes might not be familiar with helmet/smartwatch maker (weird combo, right?) Coros, they’ve put out a shockingly excellent product that’s the best triathlon watch for those who like to break from the big name brand herd without sacrificing features and functions. The battery life is hard to believe—the only downside is that you might forget it ever needs to be charged. The twisting bevel notification is super different and actually very useful as well. Coros does a great job of thinking outside the box with this powerful (and pretty) smartwatch. Heck, the larger version (46mm at $350) even won Best In Class for our 2019 Buyer’s Guide! The major tri highlights:

Claimed battery life:
Smartwatch Mode: Up to 30 days (!!)
GPS Mode: Up to 100 hours, depending on settings

Timex Ironman Classic 50

Starting at $67

Tri Functions

Swimming, cycling, open-water swimming, multisport

TL;DR

It has a stopwatch, it never dies, it always works

Best Triathlon Watch: Why It Makes the Cut

Ok, so this might seem like a joke, but real talk: Sometimes simple is best. The best triathlon watch for someone who loves to measure everything always is not exactly the best triathlon watch for someone who wants to just go for a swim or a bike or a run and know how long it took. There’s something to be said for a watch whose battery life can be measured in decades. And if you’re someone who’s had a watch die overnight causing you to miss a race-morning alarm and subsequently result in an all-out sprint LITERALLY through Times Square (where you ejected a bottle while running reds and riding the wrong way down Midtown one-way streets) to BARELY make the start of the New York City Triathlon, you might find value in something that always works no matter what. (Not saying this was me, but…) The feature list is short, but you know what you get with this one:

Claimed battery life:
Longer than your own