Do You Need a Garmin Heart Rate Monitor for Swimming?

Usually, start with wrist heart rate if your Garmin watch supports it in your swim activity and it gives you the information you need. A compatible chest strap is worth considering when stored swim heart-rate data for post-session analysis matters more than convenience; it does not provide live chest HR on the watch while the strap is underwater.

When is wrist heart rate enough?

Wrist HR is the simpler starting point when your watch supports swim HR and you only want a broad record alongside pace, distance and perceived effort. Before adding equipment, ask what you would actually do differently with a stored chest-HR trace. If you rarely review heart rate after swimming, the extra pairing, fit and care may buy you little practical value.

This is a workflow recommendation, not a claim that the two sensors have equal accuracy. For choosing a watch rather than an accessory, see the Garmin swimming watch guide. For interpreting the session itself, start with how to read a swim workout.

How does stored chest heart rate reach your watch?

Garmin’s Forerunner 570 manual lists HRM 600, the HRM-Pro series, HRM-Swim and HRM-Tri as accessories that record and store heart rate while swimming. You must start a timed activity on the paired watch to view the stored data later. Adding a heart-rate data field does not remove the underwater transmission limit.

If the saved trace is missing, first check the timed-activity, pairing and download conditions rather than assuming that water resistance guarantees data transfer. Follow the troubleshooting instructions for your exact watch and strap.

Does a strap fit pool, open-water or triathlon swimming?

Choose by the friction you are willing to accept and the analysis you will use. The comparison below is a decision framework, not a measured accuracy or stability test.

Swim workflows

Decision	Pool lap swimmer	Open-water swimmer	Triathlete
Start with	Wrist HR if supported and sufficient	Wrist HR if supported and sufficient	Your existing compatible setup
Why add stored chest HR?	Review HR alongside repeat splits	Review the saved swim trace	Include swim HR in post-session review
Setup friction	Fit, pairing, push-offs and washing	Fit, pairing and out-of-water download	Confirm swim and multisport workflow
Stability check	Does it move on wall push-offs?	Does it stay secure under swim clothing?	Does it stay secure in race clothing?
Display expectation	No live chest HR underwater	No live chest HR underwater	No live chest HR underwater

For HRM-Pro Plus specifically, Garmin says it is primarily designed for open-water swimming and can be used occasionally in the pool. Wear it under a swimsuit or triathlon top for pool swimming; otherwise it may slide down your chest when pushing off. Hand wash it after chlorine or other pool chemicals, because prolonged exposure can damage it.

What should you check before buying a Garmin HRM?

Find the swimming chest-HR instructions in your exact watch manual, then check the exact strap manual. Ordinary sensor pairing is not enough evidence that stored swim HR will be downloaded into your activity.

If you also need a watch for this stored-HR workflow, the Garmin Forerunner 570 is a concrete model to investigate: its manual documents the accessory list and download behavior described above. Keep your current watch if it already supports your needs; this evidence does not establish that you need a replacement.

Garmin Forerunner 570 watch, a model with documented stored swimming chest-HR support Check Garmin Forerunner 570 availability

For the workout side of the setup, use the Garmin swim-workout guide, or build a structured session in AquaPlan . Planning repeat distances and rest remains useful whichever sensor you choose.

Which setup fits?

Keep wrist HR unless you have a clear use for stored chest-HR data.

Add a compatible strap when reviewing swim HR after the session is worth the fit, pairing and care. For regular pool use, resolve the pool-use and push-off questions first. Do not buy any strap expecting live underwater chest HR on your watch.

Frequently Asked Questions

Can a Garmin watch display chest heart rate underwater?

Garmin’s Forerunner 570 manual says chest heart-rate data is not visible on compatible watches while the monitor is underwater. Stored swim data downloads after you save the timed activity, with the accessory active, out of the water and within 3 metres of the watch.

Which Garmin heart-rate monitors store swimming heart rate?

The Forerunner 570 manual lists HRM 600, the HRM-Pro series, HRM-Swim and HRM-Tri. That list documents this watch’s workflow; check your own watch manual and the exact accessory before buying.

Is HRM-Pro Plus suitable for regular pool swimming?

Garmin describes HRM-Pro Plus as primarily designed for open-water swimming, with occasional pool use. Its manual advises wearing it under a swimsuit or triathlon top to prevent slipping during push-offs and hand washing it after chlorine or pool-chemical exposure.

Does Garmin use wrist or chest HR when both are recorded?

In the documented Forerunner 570 swim workflow, Garmin says the watch uses chest heart-rate data when both wrist and chest data are available. Do not assume the resulting saved trace is a separate wrist-only record.

Sources and editorial process

Sources checked October 8, 2026: Garmin’s Forerunner 570 chest-HR swimming instructions and HRM-Pro Plus pool-use instructions.

Limitations: this guide is based on those two manual sections, not first-hand testing or a complete compatibility database. They do not establish comparative sensor accuracy, every strap’s pool durability, current accessory availability or support on other watch models.

Automated editorial check (daily-ai-v1): this article was authored using AI and checked through an automated editorial process. No human expert review is claimed.

Article publisher

Published and maintained by AquaPlan. The article above identifies its evidence sources and automated editorial process; no human expert review is claimed.