Garmin Forerunner 165 – My review from testing as a Marathoner and Triathlete (2026)

Bought by RunningGearLab: I paid for this Forerunner 165 myself. Garmin did not send it to me, pay for this review or approve the article. This page contains affiliate links, which may earn us a commission at no extra cost to you.

I bought the Garmin Forerunner 165 after using the 920XT and the more expensive Forerunner 955. I expected a clear downgrade. For ordinary road running, long runs and daily wear, it rarely felt like one.

Check the price before choosing

The 165 is the value pick only when the discount is meaningful. Check the exact model and colour, then compare it with the 170 before you buy.

Check price on Amazon

Compare 165 vs 170

Amazon prices change. Confirm that the listing is the Forerunner 165, not the 165 Music or another Garmin model.

Why I bought a cheaper Garmin after the 955

My first serious Garmin was the 920XT. I later moved to the Forerunner 955, which gave me maps and far more training data. I liked it, but when it broke I had to be honest about how much of that data I used.

I still wanted proper Garmin workouts, race tools and recovery trends. I did not want to pay for another top model just to ignore half the features. That is what pushed me toward the 165.

The surprise was not that the 165 could record a run. It was how little I missed the expensive watch on an ordinary training week.

Comfort: the smaller size is one of its best features

The Forerunner 165 has a 43 mm case and weighs 39 g. Coming from the larger 955, I noticed the difference right away. It is easier to forget about on a long run and more comfortable to leave on overnight.

That matters because sleep, HRV and recovery trends only help if you actually wear the watch. I do not want outdoor equipment strapped to my wrist all day. The 165 feels much closer to a normal watch.

Display and controls: AMOLED without losing the buttons

I never thought I cared much about a watch screen until I used this one. The 1.2-inch AMOLED display makes menus, messages and the morning report easy to read. It also makes the 165 feel less basic than its place in Garmin’s range suggests.

The touchscreen is handy in menus. During a run, I prefer Garmin’s five physical buttons, especially with gloves or sweaty hands. You can disable touch during activities if accidental swipes bother you.

Always-on display costs battery. I use more conservative display settings because I would rather charge less often than keep the screen lit every minute.

The running features I actually use

The feature list is long, but these are the tools that made a difference in my training:

• GPS pace and distance for easy runs, workouts and long runs.
• Daily Suggested Workouts and Garmin Coach when I want training structure.
• PacePro and Race Widget for pacing and race preparation.
• Recovery Time, HRV Status and resting heart rate for fatigue trends.
• Morning Report, Body Battery and Sleep Score as useful context, not commands I follow blindly.
• Track Run, treadmill, trail run and Ultra Run profiles for different training days.
• Courses for following a route line, although this is not the same as having full maps.

Garmin also includes wrist-based running power and running dynamics. Those are nice to have, but they were not the reason I kept the watch. For marathon training, pace, workouts, recovery trends and race tools did most of the work.

GPS and heart rate: good for my roads, with clear limits

GPS

The 165 can use multiple satellite systems, but it does not have multiband GPS. On my normal road and neighbourhood routes, it locks on quickly and the recorded tracks have been good enough that I do not think about GPS accuracy while training.

I would make a different choice for frequent runs between tall buildings, under heavy tree cover or on technical trails. Those are the situations where multiband hardware has more value.

Wrist heart rate

For easy runs, long runs and daily tracking, the wrist sensor has been useful for me. Fast intervals are different. Cold weather, quick pace changes and arm movement can all make wrist readings less dependable.

If I care about the number for a hard workout or fitness test, I pair a chest strap. That is how I treat wrist heart rate on most watches, not a complaint that is unique to the 165.

Battery life: enough for marathon training, not every ultra

I did not run a controlled battery-drain test. In normal training, the 165 did not need daily charging and it easily covered my road races and long runs. Display mode, GPS mode, music, notifications and connected sensors can change the result a lot.

These are Garmin’s maximum estimates, not my measured results. Garmin says actual life depends on the features enabled. See the official battery table.

I would not make the 165 my first choice for a 24-hour race or a multi-day trip. If that is your goal, start with our guide to the best watches for ultra runners.

What is missing, and who will notice

The missing features matter more than another long list of what the watch includes.

• No multiband GPS: normal road runners may never care; runners in difficult city or forest conditions might.
• No true triathlon mode: it records running, cycling, pool swimming and open-water swimming separately, but not one continuous multisport race.
• No full maps: you can follow a synced course, but you do not get detailed map pages like Garmin’s higher models.
• No Training Readiness or Training Status: the 165 still gives you Recovery Time, HRV Status, Training Effect and daily suggestions, but not Garmin’s fuller training overview.
• No offline music on the standard model: you need the Forerunner 165 Music if you want downloaded audio without a phone.

I did not miss most of this on ordinary road-running days. A triathlete, trail runner or runner who makes decisions from Garmin’s advanced training screens may feel differently.

Forerunner 165 vs 165 Music

I usually have my phone nearby, so offline music was not important enough for me to pay more. Remember that downloaded music also reduces GPS battery life.

Forerunner 165 vs 170: the short answer

The 165 is the older value option. The 170 is the newer choice and adds the training overview I missed on the 165, including Training Readiness and Training Status, along with a much wider selection of sport profiles.

I now use the Forerunner 170. It is the better buy when the prices are close. I would still choose the 165 at a deep enough discount because the core running experience remains very similar.

What other owners keep mentioning

I checked current owner discussions to see whether my experience was unusual. These are patterns, not controlled test results:

• Battery and planned workout tracking get frequent praise. Owners also report very different battery results depending on daily GPS use and settings.
• The light, running-first design is a common reason to keep it.
• Sleep tracking and pool-lap counting receive mixed feedback. Some owners are happy; others report missed sleep details or incorrect pool distance.
• Trail runners can outgrow it. The lack of full maps becomes more important when routes get longer or less familiar.

I used owner comments as a check, not as proof. You can read the discussions on Forerunner 165 owner feedback and moving from the 165 for trail use.

Garmin support influenced my decision too

Who should buy the Forerunner 165?

• Road runners training for a 5K, 10K, half marathon or marathon.
• Runners who want a small, light Garmin for all-day and overnight wear.
• People moving from a basic or older running watch.
• Runners who want workouts and recovery trends without the most advanced Garmin data.
• Anyone who finds the 165 at a worthwhile discount.

Who should skip it?

• Triathletes who need one continuous multisport race mode.
• Trail runners who regularly rely on full maps or multiband GPS.
• Ultra runners who need more than its GPS battery can safely cover.
• Data-focused runners who want Training Readiness and Training Status.
• Anyone paying almost the same price as a Forerunner 170.

Final verdict: still good, but only at the right price

The Forerunner 165 showed me how few premium watch features I need on a normal training week. It is light, comfortable and easy to read. It gives me the run tracking, workouts, race tools and recovery trends I use most, and it never felt like a cheap watch.

In 2026, I would not buy it at any price. I would buy it when the discount makes its missing features easy to accept.

For a road runner who wants a smaller Garmin and does not need maps, triathlon mode or the deepest training metrics, the Forerunner 165 remains an excellent value. If the Forerunner 170 is close in price, buy the 170 instead.

Garmin Forerunner 165 FAQ

Fact-checking: Specifications and maximum battery estimates were checked against Garmin’s Forerunner 165 announcement, the Forerunner 165 owner’s manual and Garmin’s Forerunner 170 announcement. Personal observations are identified as my experience. Owner comments are labelled as anecdotal.