I’ve had a few swimmers comment on this blog about their stroke rhythm, and as it happens, I managed to get my hands on a new product called the Wetronome.
This small, simple device can help you refine your rhythm, timing, and stroke rate, acting as a metronome in waterproof form.
As the name suggests, the Wetronome is like a metronome, but built for swimmers.
It emits a beeping signal at preset intervals, helping you maintain a consistent pace and develop an efficient stroke rhythm.
Each beep marks the start of a stroke, allowing you to fine-tune your timing and eliminate dead spots in your stroke cycle.

Your ideal stroke rate depends on the stroke type and distance you’re training for. Too slow and you create pauses, too fast and you lose power.
The Wetronome helps you find your personal “sweet spot” for stroke tempo.
Setup is very simple.
Use the small magnetic wand included in the package to tap the device and adjust your desired interval. A few beeps later, it’s ready to go.
You can even reset it through your swim cap. There is no need to remove it from your head between sets.
Once programmed, tuck the Wetronome under your goggle strap or beneath your swim cap, either in front of or just behind your ear.
Proper placement is key to hearing the beep clearly without interfering with your stroke.
For me, the best position is slightly behind the ear, closer to the middle of the back of the head.
This lets me hear the beeps clearly while keeping my arms free to move.

Don’t worry about disturbing other swimmers, the beep volume is subtle enough that only you will hear it unless someone is swimming right beside you.
The Wetronome is more than a pacing tool.
It’s a stroke-rate training device.
By synchronizing each arm movement with the beep, you develop a steady tempo and avoid gaps in your pull.
This helps you:
It can be used with any stroke, not just freestyle, making it a versatile training companion.
The Wetronome can also be used for mindful or association swimming, using each beep as a mental cue.
For example, if you’re focusing on a high elbow catch, you can associate every beep with that movement:
beep - good catch, beep - good catch.
This builds muscle memory over time.
It’s also great for relaxation swims. Set it at a steady pace and just cruise, like a cycling spin session to good music.
If you coach a group, you could even use a submerged speaker version of the device to cue an entire team during drills.

The original Wetronome is no longer produced, but a modern equivalent exists, the Finis Tempo Trainer.
It works on the same principle, with a slightly more intuitive interface and reliable construction.
Whether it’s the Wetronome or the Tempo Trainer, the concept remains the same, an audio cue for rhythm and tempo is one of the simplest and most effective swim-training tools you can use.
The Wetronome emits a regular beep to help swimmers maintain a consistent stroke rate or tempo. Each beep cues the start of a stroke, improving timing, rhythm, and pacing awareness.
Use the included magnetic wand to tap the device and change the interval. You can even adjust it through your swim cap without removing the unit from your head.
Place it under your swim cap or goggle strap, just behind your ear. This allows you to hear the beep clearly without interfering with your arm movement.
Yes. The Wetronome works for any stroke (freestyle, backstroke, butterfly, or breaststroke) wherever maintaining a steady rhythm improves efficiency.
No. The sound is quiet and only noticeable to you unless someone is swimming right beside you.
The Wetronome has been discontinued, but the Finis Tempo Trainer is a great alternative that offers the same functionality with modern updates.
Absolutely. Many swimmers use the rhythmic beep to unwind after work or to focus on specific stroke mechanics during meditative swims.
Comments (5)
Please email me if you would be interested in reviewing a Wetronome and we'll send you out a sample. We're think they're extremely valuable for nearly any swimmer and are keen to spread the word as widely as possible.
Cheers! Adam Young
adam@swimsmooth.com