Garmin Fenix 8 Solar

Name: Garmin Fenix 8 Solar
Brand: Garmin
SKU: 92790

Manufacturer: Garmin

The Garmin Fenix 8 Solar is a feature-rich sports watch built for athletes and outdoor enthusiasts who demand a wide range of tracking capabilities from a single device. Weighing 95 g with a 51 mm case, it carries a solid physical presence on the wrist while housing an extensive sensor suite. Its sapphire glass display sits atop a 1.4″ always-on LCD panel with a resolution of 280 x 280 px at 282 ppi, and the case is rated to 10 ATM water resistance, making it suitable for aquatic activities including diving and swim stroke counting.

On the connectivity and performance side, the Fenix 8 Solar supports GPS with fast lock acquisition, Galileo, ANT+, Wi-Fi, and NFC, while pairing with both iOS and Android devices. It includes 32 GB of internal storage and a built-in microphone for call handling. The solar-assisted rechargeable battery delivers up to 48 days in smartwatch mode, 149 hours with GPS active, and 65 hours in training mode. Health monitoring spans heart rate, HRV, VO2 max, blood oxygenation, body temperature, and wind speed, complemented by a full app ecosystem offering coaching, live tracking, route support, maps, and reproductive health features, all accessible ad-free without additional subscription costs.

Pros

Solar-assisted battery extends usage to up to 48 days in smartwatch mode and 149 hours with GPS active, reducing how often the watch needs recharging
Sapphire glass display with an always-on 1.4″ LCD touchscreen and 282 ppi pixel density offers clear visibility without requiring a wrist raise
Rated at 10 ATM water resistance with dedicated diving support, making it genuinely suitable for aquatic sports beyond casual water exposure
A comprehensive sensor suite covering GPS, heart rate, pulse oximeter, barometer, gyroscope, compass, body temperature, and wind speed serves a wide range of outdoor activities
32 GB of internal storage provides ample space for maps, routes, and music without relying on a connected phone
Multi-sport mode, automatic activity detection, stroke counting, golf support, and trackback mode cover a broad range of sporting disciplines in a single device

Cons

No wireless charging means the watch must always be connected via cable to recharge
The case measures 51 mm wide and 15.4 mm thick at 95 g, which may feel bulky on smaller wrists
There is no cellular module, so features requiring network access depend on proximity to a paired smartphone
A cadence sensor is not included, which limits cycling metric tracking without an external accessory
No external memory slot restricts storage expansion beyond the built-in 32 GB
Voice commands and a smart alarm are absent despite the watch offering a microphone and other smart notification features

Who is this for?

This watch is well suited to serious outdoor athletes and endurance sports enthusiasts who spend extended time away from charging points, thanks to its solar-assisted battery lasting up to 48 days and 149 hours with GPS active. The 10 ATM water resistance rating and dedicated diving support make it a practical choice for swimmers and divers, while multi-sport mode, automatic activity detection, trackback navigation, and uploadable maps cater to trail runners, hikers, and cyclists who need reliable route management in the field. Users who want comprehensive health monitoring — covering HRV, VO2 max, blood oxygenation, body temperature, and sleep tracking with reports — will find the sensor suite and companion app well matched to their needs. The inclusion of golf-specific functionality and a stroke counter for swimming further broadens its appeal across a range of structured sporting disciplines.

Who is this NOT for?

Users looking for a lightweight or low-profile everyday watch may find the 51 mm case, 15.4 mm thickness, and 95 g weight uncomfortable for prolonged daily wear, particularly on smaller wrists. Those who rely on standalone connectivity will be limited by the absence of a cellular module, as any feature requiring network access depends on a paired smartphone being nearby. Cyclists who want on-wrist cadence data without additional accessories will find that metric missing, and users who prefer wireless charging or expect voice command functionality will find neither supported in this configuration.

Design:

screen size	1.4"
Display type	LCD
water resistance	Sweat resistant
has branded damage-resistant glass	✓
ATM rating	10 ATM
resolution	280 x 280 px
Watch band is replaceable	✓
has a touch screen	✓
weight	95 g
Has sapphire glass display	✓
thickness	15.4 mm
Always-On Display	✓
height	51 mm
pixel density	282 ppi
Has a display	✓
width	51 mm
width of band	26 mm
volume	40.0554 cm³

The Garmin Fenix 8 Solar features a 51 x 51 mm case that is 15.4 mm thick and weighs 95 g, with a 1.4″ always-on LCD touchscreen delivering a resolution of 280 x 280 px at 282 ppi. The display is protected by sapphire glass alongside branded damage-resistant glass, ensuring solid durability in demanding conditions. Rated at 10 ATM water resistance, the watch goes well beyond basic sweat resistance for aquatic use. The 26 mm band is replaceable, giving users flexibility over time, and the overall volume of the case sits at 40.0554 cm³.

Sensors:

has GPS	✓
Has a heart rate monitor	✓
Monitors blood oxygenation levels	✓
Has a barometer	✓
has an accelerometer	✓
has a compass	✓
Has a temperature sensor	✓
Has a cadence sensor	✕
has a gyroscope	✓
Has a wind speed sensor	✓
Monitors perspiration	✕

The watch carries a broad sensor array suited to a wide range of outdoor and fitness applications. It includes GPS, a heart rate monitor, a pulse oximeter for blood oxygenation tracking, a barometer, an accelerometer, a gyroscope, a compass, a body temperature sensor, and a wind speed sensor. Perspiration monitoring and a cadence sensor are not included in this configuration.

Activity tracking:

Has a route tracker	✓
Tracks distance	✓
Measures pace	✓
Has trackback mode	✓
Tracks your sleep	✓
Has multi-sport mode	✓
Detects activities automatically	✓
Tracks elevation	✓
Tracks steps taken	✓
Provides sleep reports	✓
Has exercise tagging	✓
Has a stroke counter for swimming	✓
Tracks calorie intake	✓
Designed for diving	✓
Designed for golf	✓

Activity tracking on this watch covers a wide spectrum of sports and daily habits. It tracks steps, distance, pace, elevation, and routes, and also supports multi-sport mode alongside automatic activity detection, so it can recognize when a workout begins without manual input. Trackback mode helps users retrace their path, while exercise tagging and calorie intake tracking add further depth to workout logging. Sleep tracking comes with full sleep reports for nightly review. Aquatic activities are well served too, with a swim stroke counter and dedicated support for diving, and the watch also includes specific functionality for golf.

Connectivity:

Is compatible with iOS	✓
Is compatible with Android	✓
supports Wi-Fi	✓
has a cellular module	✕
supports ANT+	✓
has NFC	✓

The watch is compatible with both iOS and Android devices and connects wirelessly via Wi-Fi, NFC, and ANT+, the latter allowing it to pair with a range of external fitness accessories and sensors. There is no built-in cellular module, so an independent connection to a paired smartphone is required for features that rely on mobile network access.

Battery:

battery life	48 days
battery life with GPS on	149 hours
battery life in training mode	65 hours
has wireless charging	✕
Has a solar power battery	✓
has a rechargeable battery	✓
has a removable battery	✕

The watch runs on a rechargeable solar-assisted battery that is not removable. In standard smartwatch use it lasts up to 48 days, while GPS mode extends to 149 hours and training mode to 65 hours. Wireless charging is not supported, so the device requires a wired connection to recharge.

Features:

has HRV tracking	✓
measures VO2 max	✓
measures resting heart rate	✓
has fast/slow heart rate notifications	✓
shows readiness level	✓
Can upload maps	✓
Has vibrating alerts	✓
Has a stopwatch	✓
Locates your phone	✓
Has silent alarm	✓
has irregular heart rate warnings	✓
has fall detection	✓
Has notifications	✓
Acquires GPS faster	✓
Has call control	✓
Provides the sunrise/sunset time	✓
internal storage	32GB
Can be used to answer calls	✓
supports Galileo	✓
Has smart alarm	✕
Informs about the risk of thunderstorms	✓
warranty period	1 years
number of microphones	1
has voice commands	✕
Has a built-in camera remote control function	✕

Health monitoring features include HRV tracking, VO2 max measurement, resting heart rate, fast and slow heart rate notifications, irregular heart rate warnings, and a readiness and recovery indicator. The watch supports fast GPS lock and Galileo satellite systems, can upload maps, and holds 32 GB of internal storage. Wrist notifications, call control, and the ability to answer calls via a single built-in microphone are all present, while vibrating alerts, a silent alarm, fall detection, a stopwatch, a phone finder, sunrise and sunset times, and thunderstorm risk notifications round out the practical feature set. Smart alarm, voice commands, and a camera remote shutter function are not included. The watch carries a one-year warranty.

App & Software:

Provides activity reports	✓
Has inactivity alerts	✓
Counts how many calories you've burned	✓
Has goal setting	✓
Has achievements	✓
Free app	✓
Has exercise diary	✓
Ad-free	✓
Has weight tracking	✓
Tracks BMI	✓
Tracks water intake	✓
Has live tracking	✓
Has coaching	✓
Has temperature tracking	✓
Has period notifications	✓
Supports routes	✓
Syncs with existing calendars	✓
Has voice feedback	✓
Has music playback	✓
Displays fertile window notifications	✓
Includes maps	✓
Doesn’t require account	✕
Predicts start date	✓
Predicts ovulation	✓
Has video tutorials	✓
Supports widgets	✓
Can be personalised	✓
Has barcode scanner on app	✕

The companion app is free and ad-free, though an account is required to use it. It covers a broad range of tracking and management tools including activity reports, calorie burn, weight, BMI, water intake, temperature, and an exercise diary with inactivity alerts. Goal setting, achievements, coaching, voice feedback, music playback, live tracking, route and map support, calendar sync, and widgets are all available, and the app can be personalised to suit individual preferences. Reproductive health features extend to period notifications, fertile window notifications, ovulation prediction, and menstrual cycle start date prediction. Video tutorials are included to help users get started, while a barcode scanner is not part of the app's functionality.

Miscellaneous:

has a battery level indicator	✓
Is compatible with Windows	✓
Has auto pause	✓
Compatible with external heart rate monitors	✓
Available on PC	✓
Compatible with smart scales	✓
Is compatible with Mac OS X	✓
has an external memory slot	✕
has a socket for a 3.5 mm audio jack	✕

The watch includes a battery level indicator and supports auto pause during workouts. It is compatible with Windows and Mac OS X, and the companion software is available on PC. External heart rate monitors and smart scales can both be paired with the device. There is no external memory slot and no 3.5 mm audio jack socket.

Final Verdict

The Garmin Fenix 8 Solar is a technically capable sports watch built around two clear strengths: an extensive multi-discipline activity and health tracking platform, and a solar-assisted battery system that sustains weeks of use between charges. Its sensor suite, aquatic credentials, navigation tools, and comprehensive companion app make it a credible option for athletes who demand reliability across varied outdoor environments. Those prioritising a slim, lightweight form factor or standalone cellular connectivity will find certain limitations in its physical profile and tethered network dependency, but for endurance-focused users who value depth of data and field-ready durability, the Fenix 8 Solar represents a well-rounded and feature-complete offering within the sports watch category.