Garmin Forerunner 945 GPS Running Watch Review 2026

The Importance of Choosing the Right Wearable for Athletes

In the world of competitive sports and fitness, the right wearable device can make all the difference between achieving peak performance and falling short. For athletes, especially those engaged in running and triathlon training, a smartwatch must balance advanced tracking capabilities with durability, comfort, and seamless integration into daily routines. The Garmin Forerunner 945 is designed for serious athletes who demand precision, reliability, and comprehensive health insights. Its combination of GPS tracking, real-time performance analytics, and safety features makes it a compelling choice for runners and triathletes who need to monitor their progress and stay connected during intense training sessions. Whether you’re preparing for a marathon or a triathlon, the Forerunner 945 offers a suite of tools that cater to both training optimization and emergency preparedness. This review evaluates the device’s core features, performance metrics, and user experience to help athletes determine if it aligns with their specific needs and goals.

Quick Overview

Feature	Details
Device Category	Premium GPS running/triathlon smartwatch
Supported Tracking Metrics	Heart rate, cadence, elevation, stride length, VO2 Max, training status, and recovery time
Sensors and Hardware	Built-in GPS, GLONASS, Galileo, and QZSS satellite systems; 240 x 240 pixel touchscreen; Lithium Polymer battery
Battery Life	Up to 2 weeks in smartwatch mode, 10 hours in GPS mode with music, or 60 hours in ultratrac mode
Platform Compatibility	Android Wear
Intended User Profiles	Runners, triathletes, and endurance athletes requiring advanced performance analytics
Durability Ratings	Water-resistant to 50 meters; IP68 rating for dust and water resistance
Warranty and Software Support	2-year warranty; firmware updates available through Garmin Connect

The Forerunner 945’s robust feature set positions it as a versatile tool for athletes who need precise tracking, extended battery life, and seamless integration with third-party apps. Its combination of advanced sensors and durable construction makes it suitable for both training sessions and everyday use, while the Android Wear compatibility ensures it remains relevant in the evolving smartwatch ecosystem.

Activity and Health Tracking Suitability

The Garmin Forerunner 945 is engineered to provide athletes with comprehensive insights into their training performance and physiological state. Its advanced tracking capabilities include real-time monitoring of heart rate, cadence, elevation, and stride length, all of which are critical for optimizing running and triathlon workouts. The device’s VO2 Max estimation and training status analysis offer valuable feedback on aerobic and anaerobic capacity, allowing users to adjust their training intensity based on scientifically validated metrics. Additionally, the Forerunner 945 incorporates heat and altitude acclimation status, which helps athletes adapt their training plans to environmental conditions. These features make it an ideal choice for athletes who require precise data to refine their performance.

Real-Time Performance Analytics

The Forerunner 945’s ability to deliver real-time performance analytics is a standout feature for athletes. During workouts, the device continuously tracks metrics such as heart rate variability, pace, and power output, providing immediate feedback on training efficiency. The inclusion of training load balance and recovery time assessments ensures that users can avoid overtraining and maintain optimal performance levels. These analytics are particularly beneficial for endurance athletes who need to manage their energy expenditure across multiple training sessions.

Adaptive Training Adjustments

One of the key advantages of the Forerunner 945 is its capacity to adapt to individual training needs. The device’s training status feature dynamically adjusts to changes in the user’s fitness level, offering personalized recommendations for recovery and progression. This adaptability is crucial for athletes who engage in varied training regimens, such as long-distance running and swimming. The Forerunner 945’s ability to integrate data from multiple activities ensures that users receive a holistic view of their performance, enabling more informed training decisions.

Environmental Adaptation Metrics

For athletes training in different environments, the Forerunner 945’s heat and altitude acclimation status provides critical insights into how their body responds to changing conditions. This feature is particularly useful for triathletes who may compete in diverse climates, as it helps them adjust their training strategies to minimize the risk of altitude sickness or heat exhaustion. The device’s ability to track these environmental factors ensures that users can maintain their performance levels regardless of external conditions.

Sensor Accuracy and Data Reliability

Accurate data collection is essential for athletes seeking to improve their performance and monitor their health. The Garmin Forerunner 945 employs a combination of advanced sensors and algorithms to ensure reliable tracking of key metrics. Its built-in GPS, GLONASS, Galileo, and QZSS systems provide precise location data, making it an excellent choice for runners who require accurate route mapping and pace tracking. The device’s heart rate monitor uses optical sensors to provide continuous readings, which are crucial for assessing cardiovascular health and training intensity.

GPS and Location Tracking

The Forerunner 945’s multi-constellation GPS system enhances its accuracy in various environments, including urban areas with tall buildings and open terrains. This capability is particularly beneficial for runners who navigate through challenging landscapes, as it ensures that their route data remains accurate even in areas with limited satellite visibility. The device’s full-color onboard maps further enhance navigation by providing real-time guidance during runs, reducing the risk of getting lost during training sessions.

Heart Rate and Fitness Monitoring

The Forerunner 945’s heart rate monitoring system is designed to provide consistent and reliable readings throughout workouts. By using optical sensors, the device can track heart rate variability, which is essential for assessing recovery and stress levels. The integration of this data with other metrics such as VO2 Max and training status allows users to gain a comprehensive understanding of their cardiovascular health and training effectiveness.

Environmental Sensor Integration

In addition to GPS and heart rate monitoring, the Forerunner 94,5 incorporates environmental sensors that track temperature, barometric pressure, and altitude. These sensors provide valuable insights into how external conditions affect an athlete’s performance, enabling more informed training and race strategies. The combination of these environmental metrics with physiological data ensures that users receive a well-rounded view of their health and performance.

Comfort, Fit, and Wearability

For athletes who engage in long-duration training sessions, comfort and wearability are critical factors in choosing a smartwatch. The Garmin Forerunner 945 is designed with a round, lightweight body that ensures a secure fit during intense workouts. Its 1.2-inch touchscreen is optimized for visibility and ease of use, even when wearing gloves. The device’s IP68 rating for water resistance and durability makes it suitable for use in various weather conditions, from rain to sweat during training sessions.

Ergonomic Design and Weight

The Forerunner 945’s ergonomic design minimizes the risk of discomfort during extended wear. Weighing just 0.11 pounds, the device is light enough to be worn throughout the day without causing strain. The round shape and slim profile allow it to sit comfortably on the wrist, making it ideal for both training and daily use. The lightweight construction ensures that users can focus on their workouts without being distracted by the device’s weight.

Display and Interface Usability

The Forerunner 945’s 1.2-inch touchscreen provides clear visibility of data and notifications, even in bright sunlight. The interface is intuitive, with customizable watch faces and quick access to frequently used functions such as music playback and workout tracking. The device’s ability to display real-time data without requiring frequent interactions makes it a practical choice for athletes who need to stay focused during training.

Material and Build Quality

The Forerunner 945’s build quality is designed to withstand the rigors of athletic activity. The device’s durable materials and IP68 rating ensure that it can handle exposure to water, sweat, and physical impacts. This level of durability is essential for athletes who train in diverse environments, from indoor tracks to outdoor trails. The combination of a robust chassis and a secure fit ensures that the device remains functional and reliable throughout extended use.

Battery Life and Charging Expectations

Battery life is a critical consideration for athletes who rely on their smartwatches during long training sessions and races. The Garmin Forerunner 945 offers a range of battery life options to accommodate different usage scenarios. In smartwatch mode, the device can last up to 2 weeks, making it ideal for daily use without frequent charging. When GPS is enabled, the battery life is reduced to 10 hours, which is sufficient for most running and triathlon sessions. For extended endurance events, the ultratrac mode provides up to 60 hours of battery life, ensuring that users can complete their workouts without interruptions.

Power Management and Efficiency

The Forerunner 945’s power management system is designed to optimize battery life while maintaining performance. The device’s ability to switch between different power modes based on user activity ensures that it remains functional throughout the day. For example, when GPS is not required, the watch can operate in smartwatch mode, conserving energy for more demanding tasks. This adaptability is particularly beneficial for athletes who need to balance between tracking and conserving battery life.

Charging and Connectivity

The Forerunner 945’s charging process is straightforward, with a USB cable that allows for quick and efficient recharging. The device’s wireless connectivity options, including Bluetooth, ensure that it can sync with smartphones and other devices without the need for physical connections. This seamless integration is essential for athletes who need to access their data and receive notifications during training sessions.

Battery Life in Different Modes

The Forerunner 945’s battery life varies depending on the mode in which it is used. In smartwatch mode, the device can last up to 2 weeks, which is ideal for daily use and tracking non-activity-related data. When GPS is enabled, the battery life is reduced to 10 hours, which is sufficient for most running and triathlon events. For extended endurance activities, the ultratrac mode provides up to 60 hours of battery life, ensuring that users can complete their workouts without the need for frequent charging.

Device Compatibility and Ecosystem Integration

The Garmin Forerunner 945 is designed to integrate seamlessly with the broader smartwatch ecosystem, ensuring that users can access their data across multiple devices. Its compatibility with Android Wear allows for smooth synchronization with smartphones, enabling real-time data sharing and notifications. The device’s ability to connect with third-party apps such as Spotify, Amazon Music, and Deezer enhances its functionality for users who want to manage their music playlists directly from their wrist.

App Integration and Data Sync

The Forerunner 945’s compatibility with third-party music services is a significant advantage for athletes who prefer to have their favorite playlists available during workouts. By downloading songs to the watch, users can enjoy uninterrupted music without relying on their smartphones. This feature is particularly beneficial for runners who train in areas with limited cellular connectivity. The device’s ability to sync with Garmin Connect and other fitness platforms ensures that users can track their progress and receive personalized insights.

Cross-Device Synchronization

The Forerunner 945’s cross-device synchronization capabilities allow users to access their data across multiple platforms. This includes the ability to transfer workout data, heart rate metrics, and other health information to smartphones and computers for further analysis. The device’s seamless integration with the Garmin ecosystem ensures that users can maintain a comprehensive overview of their fitness progress without the need for manual data entry.

Compatibility with Smartphones and Wearables

The Forerunner 945’s compatibility with Android Wear ensures that it can function as a standalone smartwatch while still maintaining full integration with smartphones. This dual functionality is essential for athletes who need to access notifications, messages, and other features without constantly checking their phones. The device’s ability to connect with other wearables through Bluetooth further enhances its versatility in a connected ecosystem.

Durability and Environmental Resistance

For athletes who train in challenging environments, the Garmin Forerunner 945’s durability and environmental resistance are critical factors in its usability. The device is rated for water resistance up to 50 meters, making it suitable for use in rain, sweat, and even shallow water. Its IP68 rating ensures that it can withstand dust and water exposure, making it a reliable companion for both indoor and outdoor training sessions.

Water Resistance and IP Rating

The Forerunner 945’s IP68 rating indicates that it is dust-tight and can withstand immersion in water up to 50 meters. This level of water resistance is ideal for athletes who engage in swimming or training in wet conditions. The device’s ability to function underwater ensures that users can continue their workouts without the risk of damage from moisture.

Weather Resistance and Environmental Factors

The Forerunner 945’s design also includes resistance to extreme weather conditions, making it suitable for use in various climates. The device’s ability to track environmental factors such as temperature and barometric pressure provides valuable insights into how external conditions affect performance. This feature is particularly beneficial for athletes who train in different environments, from cold mountain trails to hot urban areas.

Longevity and Wear Resistance

The Forerunner 945’s build quality is designed to withstand the wear and tear of regular use. The device’s durable materials and secure fit ensure that it remains functional even after prolonged exposure to physical activity. This longevity is essential for athletes who rely on their smartwatches for consistent performance tracking and safety features.

Pros & Cons

Pros

• Advanced GPS Tracking: The Forerunner 945’s multi-constellation GPS system provides accurate location data, making it ideal for runners and triathletes who need precise route mapping and pace tracking.
• Comprehensive Health Analytics: The device offers detailed insights into heart rate, VO2 Max, and training status, helping users optimize their performance and recovery.
• Long Battery Life: With up to 2 weeks of battery life in smartwatch mode, the Forerunner 945 is suitable for daily use without frequent charging.
• Third-Party Music Integration: Users can download songs from Spotify, Amazon Music, and Deezer, allowing for uninterrupted music playback during workouts.
• Safety Features: The incident detection system sends real-time location data to emergency contacts, providing peace of mind during training sessions.
• Durable Construction: The IP68 rating and water-resistant design ensure the device can withstand harsh weather conditions and physical impacts.
• Seamless Ecosystem Integration: Compatibility with Android Wear and Garmin Connect allows for smooth synchronization with smartphones and other fitness platforms.
• Customizable Interface: The device’s intuitive interface and customizable watch faces cater to different user preferences and training needs.

Cons

• Limited App Ecosystem: While the Forerunner 945 supports third-party music apps, its app ecosystem is more limited compared to other smartwatches, which may restrict customization options.
• No Cellular Connectivity: The device lacks built-in cellular capabilities, requiring a smartphone for data access and notifications during training sessions.
• Battery Life in GPS Mode: While the battery life in smartwatch mode is impressive, the 10-hour GPS mode may be insufficient for ultra-long-distance runs or triathlons.
• Size and Weight: The device’s round shape and slightly heavier build may not be as comfortable for users with smaller wrists or those who prefer a more streamlined design.
• Limited Software Updates: The Forerunner 945’s software updates are less frequent compared to newer models, which could affect long-term usability and feature enhancements.

Final Verdict: Who This Wearable Is Best For (and Who Should Skip It)

The Garmin Forerunner 945 is an excellent choice for serious runners and triathletes who require advanced tracking capabilities, durability, and seamless integration with their training routines. Its combination of precise GPS, comprehensive health analytics, and safety features makes it ideal for athletes who need to monitor their performance and stay connected during intense workouts. The device’s long battery life and third-party music integration further enhance its appeal for users who prioritize convenience and reliability.

However, the Forerunner 945 may not be the best fit for casual users or those who require cellular connectivity for extended periods without a smartphone. The limited app ecosystem and lack of cellular capabilities could be drawbacks for users who rely on constant data access or prefer a more customizable smartwatch experience. For athletes who need a reliable, feature-rich device to support their training and performance goals, the Forerunner 945 remains a top-tier option in the premium smartwatch market.

Frequently Asked Questions (FAQs)

Does the Garmin Forerunner 945 support third-party music apps?

Yes, the Forerunner 945 allows users to download songs from Spotify, Amazon Music, and Deezer directly to the watch. However, this feature may require a premium subscription with the respective music provider.

How long does the battery last in GPS mode?

The Forerunner 945 provides up to 10 hours of battery life in GPS mode with music enabled. This duration is suitable for most running and triathlon sessions, though extended endurance events may require additional charging.

Can the Forerunner 945 be used for swimming?

The Forerunner 945 is water-resistant up to 50 meters and has an IP68 rating, making it suitable for use in shallow water. However, it is not designed for deep-water swimming or prolonged underwater use.

What safety features does the Forerunner 945 offer?

The Forerunner 945 includes incident detection during select activities, which automatically sends the user’s real-time location to emergency contacts via a paired smartphone. This feature enhances safety during outdoor training sessions.

Is the Forerunner 945 compatible with Android Wear?

Yes, the Forerunner 945 is compatible with Android Wear, allowing for seamless synchronization with smartphones and access to notifications, messages, and other features without constant phone interaction.

Can the Forerunner 945 track elevation and cadence?

Yes, the Forerunner 945 accurately tracks elevation, cadence, and stride length using its advanced sensors. These metrics are essential for analyzing running performance and adjusting training intensity.

Does the Forerunner 945 have a long battery life for daily use?

The Forerunner 945 offers up to 2 weeks of battery life in smartwatch mode, making it ideal for daily use and tracking non-activity-related data without frequent charging.

What is the weight of the Forerunner 945?

The Forerunner 945 weighs 0.11 pounds, ensuring a lightweight and comfortable fit for extended wear during training and daily activities.