Garmin · Previous Models
The Garmin Forerunner® 165 in Black/Slate Gray is a purpose-built GPS running smartwatch designed for runners who want clear feedback, structured guidance, and everyday wearability. A 1.2” colorful AMOLED display and both touchscreen and buttons make it easy to check stats at a glance and interact mid-workout.
With built-in GPS for time, distance, pace and speed plus wrist-based heart rate, it supports focused training and consistent tracking. It also helps shape day-to-day decisions with training metrics, recovery insights, and sleep-based HRV status. Battery life is rated up to 11 days in smartwatch mode, helping keep training and wellness trends together in one place.
Training
Daily suggested workouts are built to fit the runner’s routine and adjust after every run based on performance and recovery, with upcoming races pulled from the Garmin Connect™ smartphone app calendar. Garmin Coach adds free adaptive plans for 5K, 10K and half-marathon goals for structured progression over time.
Navigation
Forerunner® 165 tracks key metrics with built-in GPS and wrist-based heart rate, delivering pace, distance, time and speed for each session. It also provides wrist-based running dynamics such as cadence, stride length and ground contact time, along with wrist-based running power to help manage effort on road or trail.
Connectivity
When paired with a compatible iPhone® or Android™ smartphone, smart notifications deliver emails, texts and alerts to the watch. Garmin Pay™ contactless payments work with participating providers, and the watch can control a paired smartphone’s music. Safety and tracking can send a message with live location if an incident is detected.
Display
Designed for running and all-day wear, Forerunner® 165 features an AMOLED display with an optional always-on mode and a 390 x 390 pixels resolution on a 1.2" (30.4 mm) diameter screen. Touchscreen control is paired with buttons for confident operation during workouts. The Black/Slate Gray configuration uses a silicone strap, a fiber-reinforced polymer bezel, and chemically strengthened glass over the display.
Training
Beyond basic tracking, this watch supports planning with training effect, recovery time, and sleep monitoring with sleep score and insights. HRV status is measured while sleeping to provide additional perspective on overall health, training and recovery. Morning Report summarizes sleep and training outlook after waking, and Body Battery™ energy monitoring helps show how sleep, naps, activities and stress can influence energy levels.
Battery
Forerunner® 165 is built to keep up with frequent training and daily tracking. Battery life is rated up to 11 days in smartwatch mode, with up to 20 days in Battery Saver Smartwatch mode. For GPS use, it delivers up to 19 hours in GPS-Only GNSS mode and up to 17 hours in All-Systems GNSS mode. Charging is handled through a Garmin proprietary plug charger.
| Part Number | 010-02863-20 |
|---|---|
| Model | Forerunner® 165 |
| Configuration | Black/Slate Gray |
| Battery life (smartwatch mode) | Up to 11 days |
| Pulse Ox blood oxygen | Yes (spot-check, during sleep, all day) |
| Display type | AMOLED (optional always-on mode) |
| Water rating | 5 ATM |
| Strap material | Silicone |
| Lens material | Chemically strengthened glass |
| Bezel material | Fiber-reinforced polymer |
| Quick Release bands | Yes (20 mm, Industry standard) |
| Physical size | 43 x 43 x 11.6 mm; Fits wrists with a circumference of 126-203 mm |
| Weight | 39 g |
| Display Size | 1.2" (30.4 mm) diameter |
| Display resolution | 390 x 390 pixels |
| Battery type | Lithium ion |
| Battery life (Battery Saver Smartwatch mode) | Up to 20 days |
| Battery life (GPS-Only GNSS mode) | Up to 19 hours |
| Battery life (All-Systems GNSS mode) | Up to 17 hours |
| Charging method | Garmin proprietary plug charger |
| Memory/History | 4 GB |
| Forerunner 165 running watch |
| USB-C charging/data cable |
| Documentation |
| Gym | Strength, HIIT, Cardio, Elliptical Training, Stair Stepping, Floor Climbing |
|---|---|
| Wellness | Walking, Pilates, Yoga, Indoor Walking |
| Indoor running | Treadmill Running, Indoor Track Running, Virtual Running |
| Outdoor running | Running, Outdoor Track Running, Trail Running, Ultra Running |
| Outdoor recreation | Hiking |
| Cycling | Biking, Indoor Biking |
| Swim | Pool Swimming, Open Water Swimming |
| Racket sports | Tennis, Pickleball, Padel |
| What You'll Love | Sleep score and insights, Garmin Pay™, Touchscreen |
|---|---|
| General | Color display, Large font option |
| Clock Features | Time/date, GPS Time Sync, Automatic daylight saving time, Alarm clock, Timer, Stopwatch, Sunrise/sunset times |
| Health & Wellness Monitoring | Heart rate (constant, every second), Resting heart rate, Respiration rate, Fitness age, Body Battery™ energy monitor, All-day stress, Relaxation reminders, Relaxation breathing timer, Breathwork, Breathing variations and 2 more |
| Sensors | GPS, GLONASS, Galileo, Garmin Elevate™ wrist heart rate monitor, Pulse Ox blood oxygen saturation monitor, Barometric altimeter, Compass, Accelerometer, Thermometer, Ambient light sensor |
| Daily Smart Features | Find My Phone, Find My Garmin (helps locate lost device), Find My Phone during GPS activity, Connect IQ™ (downloadable watch faces, data fields and apps), On-device Connect IQ™ Store, Smart Notifications, Text response/reject phone call with text (Android™ only), View images from notifications on watch (Android™ only), Morning report, Calendar and 9 more |
| Workout and Training Plans | Daily suggested workout - Running (pace and heart rate based), Garmin running coach experts, Garmin Coach - Prebuilt cycling plans, Cardio workouts, Strength workouts, HIIT workouts, Yoga workouts, Pilates workouts |
| Safety and Tracking Features | Incident detection during select activities, Incident detection alert on phone for wearables, Assistance |
| Activity Tracking Features | Step counter, Move alerts (displays on device after a period of inactivity), Auto goal (learns your activity level and assigns a daily step goal), Calories burned, Floors climbed, Distance traveled, Intensity minutes, TrueUp™, Move IQ™, Automatic rep counting |
| Training, Planning and Analysis Features | Customizable data pages, Downloadable training plans, Course guidance, HR zones, HR alerts, HR calories, % HR max, % HRR, Recovery time, Auto max HR and 23 more |
| Running Features | GPS-based distance, time and pace, Running dynamics, Vertical oscillation and ratio, Stride length (real time), Cadence (provides real-time number of steps per minute), Running power, PacePro™ pacing strategies, Run workouts, Race predictor, Course- and weather-specific race predictor and 2 more |
| Outdoor Recreation | UltraTrac mode, Elevation profile, Distance to destination, Total ascent/descent, Rest timer (ultra run only), Auto rest, Future elevation plot |
| Mapping & Navigation | Point-to-point navigation, Bread crumb trail in real time, Back to start, TracBack® |
| Cycling Features | Courses, Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories), Compatible with Varia™ radar (rear-facing radar), Compatible with Varia™ lights, Compatible with Varia™ headlight camera, Speed and cadence sensor support (w/sensor) |
| Swimming Features | Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (SWOLF), calories), Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (SWOLF), calories), Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only), Drill logging (pool swim only), Basic rest timer (up from 0) (pool swim only), "Repeat on" rest timer (pool swim only), Auto rest (pool swim only), Time and distance alerts, Countdown start (pool swim only), Underwater wrist-based heart rate |
| Abnormal heart rate alerts | Yes (high and low) |
|---|---|
| Sleep | Yes (advanced) |
| Hydration | Yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Women's health | Yes (in Garmin Connect™ and optional Connect IQ™ widget) |
| Connectivity | Bluetooth®, ANT+® |
|---|---|
| Smartphone compatibility | IPhone®, Android™ |
| Area calculation | Yes (via Connect IQ™) |
|---|---|
| Fish forecast | Yes (via Connect IQ™) |
| Sun and moon information | Yes (via Connect IQ™) |
Activity tracking accuracy
This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Breathing Variations not available in all countries.
This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Pulse Ox not available in all countries.
When paired with your compatible smartphone. For safety and tracking feature requirements and limitations, see Garmin.com/safety.
iPhone is a trademark of Apple Inc., registered in the U.S. and other countries. Android is a trademark of Google LLC.
