The Garmin Forerunner 165 is a lightweight, user-friendly running smartwatch designed to support runners of all levels with advanced training tools and smart health insights. At its core is a bright, colorful AMOLED touchscreen display that makes stats easy to read at a glance, whether you’re checking pace mid-run or reviewing your daily progress. Its 43 mm size strikes a balance between a large, readable screen and comfortable all-day wear, while traditional button controls complement the touchscreen for reliable navigation during workouts.

Built-in GPS enables accurate tracking of pace, distance, and route without needing to bring your phone, and the Forerunner 165 goes beyond basic metrics with comprehensive training features. Personalized daily suggested workouts adapt based on your performance and recovery status, helping you train smarter over time. The watch also offers adaptive plans for race training and a “morning report” that summarizes your sleep, recovery, and readiness for the day, giving you actionable insights to guide your training schedule.

Health tracking on the Forerunner 165 is robust, with continuous wrist-based heart rate monitoring, pulse oximetry (blood oxygen), stress and sleep analysis, and Body Battery™ energy monitoring to help you understand your body’s condition throughout the day and night. These features make it easy to see how your workouts, rest, and everyday activities affect your overall health and recovery.

Despite all these capabilities, the Forerunner 165 maintains excellent battery life, lasting up to about 11 days in smartwatch mode and up to around 19 hours in GPS mode on a single charge, which keeps you going through long training cycles without frequent recharging. The watch also supports smart features like smartphone notifications and compatibility with the Garmin Connect™ app so you can sync data, customize metrics, and plan workouts easily.

Product Overview
Brand Name: Garmin
Model Name: Forerunner 165
Category: GPS Running Smartwatch
Target Use: Running, fitness tracking, health monitoring, everyday smartwatch use
Color Options: Black, Whitestone

Display
Display Type: AMOLED color touchscreen
Display Size: 1.2 inches (30.4 mm diagonal)
Resolution: 390 × 390 pixels
Touchscreen: Yes
Always-On Display: Optional
Screen Protection: Chemically strengthened glass
Large Font Option: Yes

Physical & Build
Case Material: Fiber-reinforced polymer
Bezel Material: Fiber-reinforced polymer
Lens Material: Chemically strengthened glass
Strap Material: Silicone
Quick-Release Bands: Yes (20 mm)
Dimensions: 43 × 43 × 11.6 mm
Weight: ~39 g
Water Resistance: 5 ATM (swim-rated)

Battery & Charging
Battery Type: Rechargeable lithium-ion
Battery Life (Smartwatch Mode): Up to 11 days
Battery Saver Smartwatch Mode: Up to 20 days
GPS-Only Mode: Up to 19 hours
All-Systems GNSS Mode: Up to 17 hours
Charging Method: Proprietary Garmin charging cable
Memory/History: 4 GB storage

Sensors & Tracking
GPS: Built-in GPS with multi-satellite support
Heart Rate Monitor: Wrist-based continuous heart rate
Pulse Ox (Blood Oxygen Saturation): Yes
Respiration Rate (24/7): Yes
Resting Heart Rate: Yes
Body Battery Energy Monitoring: Yes
Fitness Age: Yes
Sleep Tracking: Yes
Daily Suggested Workouts: Yes
Training Metrics & Recovery Insights: Yes
Stress Tracking: Yes
Altimeter: Yes
Barometer: Yes
Compass: Yes
Accelerometer: Yes

Fitness & Sports Features
Running Metrics: Distance, pace, speed, cadence
Training Status & Training Effect: Yes
Daily Suggested Workouts: Yes
Exercise Profiles: Running, cycling, swimming, strength, cardio, yoga, HIIT, treadmill, hiking, and more
Adaptive Training Plans: Yes
Race Training: Yes
LiveTrack: Yes
VO2 Max Estimation: Yes

Smart Features
Smartphone Notifications: Yes (calls, texts, app alerts)
Music Controls: Yes
Garmin Pay (NFC): Yes (contactless payments)
Compatibility: Android and iOS
Bluetooth Connectivity: Yes
ANT+ Support: Yes

Watch & Clock Functions
Time/Date: Yes
GPS Time Sync: Yes
Automatic Daylight Saving Time: Yes
Alarm Clock: Yes
Timer: Yes
Stopwatch: Yes
Sunrise/Sunset Times: Yes

Environmental
Operating Temperature Range: -20°C to 60°C
Charging Temperature Range: 0°C to 45°C
Water Rating: 5 ATM (suitable for swimming and showers)

Included in Box
Garmin Forerunner 165 smartwatch
Charging/data cable
Quick start guide / documentation