Lifetime support from Bluewater’s dive-gear specialists
The Garmin Fenix 8 is a rugged multisport smartwatch that doubles as a sophisticated Garmin dive watch and full-featured Garmin dive computer. It’s certified for underwater use down to 40 meters (131 ft) and leverages the Bühlmann ZHL-16c decompression algorithm with customizable gradient factors, safety-stop guidance, deep-stop alerts, ascent rate monitoring, and no-fly and no-deco warnings—ensuring precise and actionable dive feedback throughout your dive profile. Leak-proof buttons, a depth gauge, water-temperature sensor, and a three-axis dive compass with adjustable heading enable intuitive in-dive control and orientation . Entry and exit points are logged via multi-band GPS or Galileo support—ideal for logging drift dives or remote locations.
What You’ll Love about the Fenix 8:
Underwater:
- Dual Dive & Surface Mode: Seamlessly switch from dive computer to smartwatch — no need for two devices on your trip.
- Depth-Rated to 40 m / 131 ft: Ideal for recreational divers and travel diving; log dives automatically with precise depth and temperature tracking.
- Dive Logs & Garmin Dive App Sync: View your dive profile, surface intervals, and GPS entry/exit points instantly on your phone.
- Bright, Always-On Display: Easily readable underwater or in bright sun, even through a mask.
On Land & Surface:
- Full Multisport Tracking: From open-water swimming to hiking, cycling, and running — track 100+ activities with advanced metrics.
- Solar Charging (Select Models): Extend battery life during expeditions, dives, and liveaboards.
- Smart Notifications & Offline Maps: Get texts, use GPS mapping, and navigate remote dive sites without needing your phone.
- Health & Fitness Insights: Track heart rate, stress, sleep, and training load so you stay fit between dive trips.
- Every Day: Built for Adventure: Premium titanium and sapphire-lens construction resists scratches and corrosion in saltwater.
- Stylish Enough for Everyday Wear: A dive computer that looks great in meetings, workouts, or nights out.
- Trusted by Bluewater Experts: Tested and recommended by our dive travel and photo pros — reliable performance above and below the surface.
Every Day:
- Built for Adventure: Premium titanium and sapphire-lens construction resists scratches and corrosion in saltwater.
- Stylish Enough for Everyday Wear: A dive computer that looks great in meetings, workouts, or nights out.
- Trusted by Bluewater Experts: Tested and recommended by our dive travel and photo pros — reliable performance above and below the surface.
Beyond diving:
The Fenix 8 offers comprehensive training insight. It supports over 100 activity profiles—from open-water swimming and trail running to triathlon and climbing—with advanced metrics such as VOâ‚‚ max, recovery advisor, training load, and performance condition. The bright OLED display, speaker, microphone for phone calls or voice assistant access, plus an LED flashlight, enhance usability both underwater and on land. Rugged by design—featuring sapphire or Gorilla Glass, MIL-STD-810 compliance, leak-proof buttons, sensor guards, and up to 100 m water resistance—the Fenix 8 merges durability with modern daily wearability. Battery life spans from several days to weeks depending on mode—ensuring endurance through training sessions, dive trips, and backcountry adventures.
Bluewater Photo also offers industry-leading alternatives like the Garmin Descent G2 dive watch and Garmin Descent Mk3i dive computer smartwatch—ideal for divers seeking air-integration or specialized dive features alongside the versatility of the Fenix 8.
Rugged Yet Refined
The Garmin Fenix 8 is constructed with a sapphire crystal lens for scratch resistance, a reinforced polymer case with metal rear cover, and stainless steel or titanium bezels for long-term durability. It is tested to U.S. military standards (MIL-STD-810) for thermal, shock, and water resistance, ensuring reliable operation in extreme environments. Despite its robust build, the watch maintains a balanced form factor suitable for everyday use, combining functional toughness with a modern, streamlined design that transitions easily from demanding outdoor conditions to daily wear.
Advanced Dive Capabilities
The Garmin Fenix 8 includes a full suite of dive-specific functions that extend its use beyond a standard smartwatch. It supports single-gas, multi-gas, and nitrox diving with configurable oxygen percentages. Depth is tracked accurately up to 100 meters with integrated sensors, while decompression data, no-decompression limits, and safety stop guidance are displayed in real time. The watch monitors ascent rates with vibration and visual alerts to reduce the risk of decompression sickness. A dedicated dive log automatically records depth profiles, dive time, water temperature, and gas settings, which can be reviewed directly on the watch or synced with Garmin Dive™ software for detailed post-dive analysis. These functions allow the Fenix 8 to operate as both a primary and backup Garmin dive computer, providing divers with reliable wrist-based instrumentation in a compact form factor.
Multisport Performance
The Garmin Fenix 8 supports over 30 integrated activity profiles covering running, cycling, swimming (pool and open water), skiing, snowboarding, rowing, hiking, climbing, golf, and triathlon. It provides advanced training metrics such as VO2 max estimation, recovery time advisor, training load and status, and performance condition analysis. Wrist-based heart rate and pulse oximeter sensors allow continuous monitoring of exertion and acclimatization at altitude. GPS, GLONASS, and Galileo satellite support ensure precise route tracking, while a barometric altimeter, compass, and gyroscope deliver accurate elevation and orientation data. PacePro™ guidance offers grade-adjusted pacing during runs, and ClimbPro™ displays real-time gradient profiles on ascents. The watch also supports structured workouts, interval training, and integration with power meters and external sensors via ANT+® and Bluetooth®. These functions make the Fenix 8 a versatile training tool for endurance athletes, outdoor adventurers, and multisport users requiring reliable data across varied disciplines.
Perfect for:
- Divers seeking a reliable wrist-based computer
- Outdoor adventurers navigating extreme environments
- Athletes optimizing multisport performance
- Everyday wear with smart features and style
Trusted Garmin Quality
Garmin has led the way in GPS technology and wearable innovation for decades. The Fenix 8 is rigorously tested for accuracy, durability, and reliability, giving you confidence in any environment. Covered by a full manufacturer’s warranty and backed by global support, this watch is built for those who never compromise.
Lifetime support from Bluewater’s dive-gear specialists
Free shipping over $50 · Lifetime Support included
Garmin Dive Watch Comparison — Key Features
| Feature | Garmin fēnix 8 | Garmin Descent Mk3i | Garmin Descent G2 |
|---|---|---|---|
| Display | AMOLED or Solar (MIP) options (model-dependent) | AMOLED (43 mm: 1.2"; 51 mm: 1.4") | 1.2" AMOLED (390 × 390) |
| Case sizes | 43 mm, 47 mm, 51 mm (series variants) | 43 mm or 51 mm | 45.5 mm |
| Dive / water rating | Water: 10 ATM; Dive (EN 13319): 4 ATM (to ~40 m) | Dive-rated to 200 m (EN 13319) | Water: 10 ATM; Dive (EN 13319) to 100 m |
| Dive modes / algorithm | Recreational scuba & apnea (to 40 m); Bühlmann ZHL-16C | Rec/tech: air, nitrox, trimix, CCR; Bühlmann ZHL-16C (GF) | Rec/tech incl. nitrox/trimix/CCR; Bühlmann ZHL-16C |
| Air integration (tank data) | No | Yes — SubWave™ with Descent T2 transmitter | No (air-integration on G2i variant) |
| Underwater comms | — | SubWave™ diver-to-diver messaging (with T2) | — |
| Maps & GPS | On-device maps (select models); multi-band GNSS | DiveView™ & topo maps; multi-band GNSS; surface entry/exit marking | Multi-GNSS; surface entry/exit marking (via Garmin Dive™ app) |
| Battery — smartwatch mode | Long life; varies by size & display (AMOLED vs Solar) | Up to ~25 days (51 mm); up to ~10 days (43 mm) | Up to 10 days (12 days in battery-saver) |
| Battery — dive mode | — (recreational features only) | Up to 30 h (43 mm) / up to 66 h (51 mm) | Up to 27 h |
| Materials (lens / case) | Sapphire lens on Sapphire models; steel/titanium cases | Sapphire lens; stainless steel/titanium case | Sapphire lens; ocean-bound plastic bezel/case |
| LED flashlight | Yes (built-in) | Yes (built-in) | No |
| Speaker & mic | Yes (calls/voice assist) | Yes (voice assistant & calls support varies by region) | No |
Notes: Battery figures vary by size/model and settings (AOD, GNSS mode, etc.). “Air integration” and underwater comms on Mk3i require the SubWave™ T2 transmitter.
Related Underwater Gear Categories:
- Our favorite Camera System - Sony a6700
- An advanced Underwater Camera System - Canon R5 ii
- Underwater Video Lights
- More Dive Computer Options
Detailed Specifications
- Display: AMOLED, available in 1.3" (43mm), 1.4" (47mm & 51mm) with up to 454 x 454 pixels.
- Water Rating: 10 ATM (100 meters), Dive-rated to 40 meters.
- Battery Life: Up to 48 days in smartwatch mode with solar (51mm model).
- Memory: 32 GB.
- Material: Corning® Gorilla® Glass or Sapphire crystal lens, Stainless steel or Titanium bezel, Fiber-reinforced polymer case.
- Weight: Varies by model: 66g (43mm), 80g (47mm), 102g (51mm).
- Wireless Technologies: Bluetooth®, ANT+®, Wi-Fi®.
Diving Related Specifications:
| Diving Features | Details |
|---|---|
| Dive activity maximum operating depth | 40 metres |
| Single-gas mode | ✔ |
| APNOEA mode | ✔ |
| Decompression model | Bühlmann ZHL-16c with gradient factors |
| Nitrox support | ✔ |
| Gas mixes | Air, Nitrox (21-40% Oxygen) |
| PO2 | Up to 1.6 with customisable Deco settings |
| Auto start/end dive | ✔ |
| Custom end-dive timeout | Yes (20 sec to 10 min) |
| Safety Stop | Yes (customisable off/3min/5min) |
| Deep Stops | Yes (using custom gradient factors) |
| Customisable conservatism | Yes (low/medium/high or custom using gradient factors) |
| Dive ascent/descent rate indicator | ✔ |
| Automatic altitude adjustment | ✔ |
| No fly time | ✔ |
| Dive planner | Yes (Basic NDL & Gas Planner) |
| Tides | ✔ |
| Backlight | Yes (configurable intensity; always on) |
| Automatically saves dive entry and exit locations | ✔ |
| Sync dive log to Garmin Dive™ Mobile app | ✔ |
| Alerts & alarms | Yes (vibration only) |
| 3-axis dive compass | Yes with adjustable heading, quick change to 90R, 90L, and Reciprocal. Indicates degrees and direction back to set heading. |
| Missed Deco Lockout | Yes (can be disabled prior to dive with user acknowledgement) |
| Surface diver status widget | Yes (Surface Interval, no fly time, N2 loading, CNS, OTU, and Tissue Compartment status) |
| Hoseless gas intergartion option | NO |
What's in the Box
- Garmin FÄ“nix 8 Series Watch
- Charging/Data Cable
- Documentation
Can the Fenix 8 be used as my main dive computer?
Yes — for most recreational divers (max 40 m / 131 ft), the Fenix 8 functions perfectly as your primary dive computer. It supports single-gas diving (air and Nitrox), logs dives automatically, and syncs with the free Garmin Dive App. If you regularly dive deeper than 40 m or need air-integration, you might prefer the Garmin Descent Mk3i series.
How deep is the Fenix 8 rated for diving?
The Fenix 8 is water-rated to 10 ATM (100 m / 328 ft) and EN13319 certified for diving up to 40 m (131 ft). That covers all recreational dive depths — whether you’re exploring reefs, wrecks, or walls — while still remaining safe for daily swimming and watersports.
Does it support Nitrox or multiple gas mixes?
Yes, the Fenix 8 supports Nitrox (21–40 %) and lets you customize POâ‚‚ settings directly from the watch. It does not support multiple gas switches or air-integration — those features are reserved for the Descent Mk3i.
Can I use it for other sports and training?
Absolutely! The Fenix 8 is a full multisport smartwatch with 100+ activity profiles including running, cycling, swimming, hiking, skiing, and strength training. It also tracks heart rate, sleep, stress, VOâ‚‚ max and training load — making it ideal for active divers who train between trips.
How long does the battery last?
Battery life depends on mode: Smartwatch mode: Up to 28 days (plus solar boost on Solar models) Dive mode: Up to 30 hours GPS expedition: Up to 80 hours Perfect for multi-day liveaboards or travel without constant charging.
What’s included in the box?
Each Fenix 8 includes the watch, charging/data cable, documentation, and a bonus Bluewater Dry Bag (for a limited time). You can also add additional bands or screen protectors — ask our team for recommended accessories.
Is the Fenix 8 compatible with the Garmin Dive App and Garmin Connect?
Yes — all dives and activities automatically sync to both apps via Bluetooth or Wi-Fi. You can review dive profiles, entry/exit GPS points, training load, and performance metrics in real time.
Does Bluewater Photo provide after-purchase support?
Absolutely. Our dive-gear experts are certified Garmin dealers and active divers themselves. We offer setup assistance, troubleshooting, and personal recommendations for configuring the Fenix 8 for your specific diving needs.
Why Buy from Bluewater
- Authorized Garmin & dive gear dealer — full manufacturer warranty.
- Founded and staffed by active divers, underwater photographers, and explorers.
- Decades of combined hands-on experience with the gear we sell.
- We test and use most of the equipment ourselves before recommending it.
2. Risk-Free Purchase (See Terms Of Service)
- 30-day, hassle-free returns (unused condition).
- Secure payment with trusted gateways (credit card, PayPal, etc.).
- All products shipped in factory-sealed boxes (unless stated).
- Transparent policies — no hidden fees or fine-print surprises.
3. Fast & Reliable Delivery
- Free U.S. shipping over $200 for Photo Gear & $50 for Dive Gear.
- Same-day dispatch on in-stock orders placed before 12pm.
- Worldwide shipping options with reliable carriers.
- Real-time tracking updates sent straight to your inbox.
4. Extra Value at No Extra Cost
- Lifetime product support by email, phone, or in-store.
- Setup help & usage tips tailored to your needs.
- Exclusive buyer’s guides, tutorials, and dive trip invitations.
- Early access to special promotions & new releases.
5. Social Proof & Community
- Thousands of satisfied divers & underwater photographers worldwide.
- 5-star average product & service ratings.
- Active in dive events, conservation projects, and photography competitions.
6. Personal Connection
- Direct line to our in-house experts — no outsourced call centers.
- Friendly, passionate staff who speak “diver” fluently.
- We care about your whole adventure, not just the sale.
We offer lifetime support with all purchases.
Please call or email us with any questions; our knowledgeable staff would love to assist you.
