For Garmin triathlon watches, choose Forerunner 945 for full maps, music, and longer GPS; pick Forerunner 935 for a lighter, lower‑cost training tool.
Forerunner 935
Forerunner 945
Best Budget Route
- Grab a refurb 935 from a US retailer.
- Tri metrics, long GPS, swim‑safe.
- Pairs with ANT+, Bluetooth, and Wi‑Fi.
Forerunner 935
Feature‑Packed Route
- Go 945 for full maps on the wrist.
- Offline music + Garmin Pay.
- Safety alerts with phone nearby.
Forerunner 945
Picking a tri‑capable GPS watch shapes how you train, race, and recover. One option keeps the buy‑in low and excels at the basics. The other layers in full maps, music, and safety tools. This guide gives you the quick answer up top and the trade‑offs that make the choice easy.
In A Nutshell
The 935 is the value play for runners and triathletes who want long GPS time, a light case, and pro‑grade metrics without extras. The 945 is the “everything” route: color maps, on‑watch music, Garmin Pay, and longer GPS runtime. If maps and safety tools matter, the 945 is worth it. If you’re price‑sensitive, the 935 nails the core features.
Side‑By‑Side Specs
Forerunner 935 — What We Like / What We Don’t Like
✅ What We Like
- Excellent GPS runtime for long events (up to 24 hr in GPS, 2 weeks as a watch).
- Light case that wears well for all‑day training blocks.
- Used/refurb stock in the US often lands far below the original list price.
⚠️ What We Don’t Like
- No onboard music or payments; you’ll carry a phone for tunes and checkout.
- No incident alerts; safety tools are limited to LiveTrack with a phone.
Forerunner 945 — What We Like / What We Don’t Like
✅ What We Like
- Full‑color maps with ClimbPro for course planning and real‑time ascent pacing.
- On‑watch music (up to 1,000 songs) and Garmin Pay for phone‑free runs.
- Longer GPS time (up to 36 hr) plus incident alerts and assistance via your phone.
⚠️ What We Don’t Like
- Higher list price when new; used/renewed units vary in bundle and condition.
- GPS + music cuts runtime, so long ultraruns may still call for phone‑free audio.
Garmin 935 Or 945: Which Fits You Better
Performance & Speed
Both watches lock onto satellites quickly and track runs, rides, and swims with the accuracy Garmin is known for. The 935 already stretches far with up to 24 hours of GPS time. The 945 goes further with up to 36 hours in GPS mode and up to 10 hours in GPS + music. Those figures come straight from Garmin’s specs pages, so you can plan race nutrition and charger time with confidence (935 specs; 945 specs).
Display & Build
Both use Garmin’s sunlight‑friendly MIP display for clear outdoor viewing and stick with a durable case designed for training, pool work, and race day abuse. Each carries a 5 ATM water rating, which covers pool sessions and open‑water swims. That rating is defined on Garmin’s own chart if you want a quick refresher (water rating guide).
Battery & Charging
Planning long blocks? The 935’s “up to two weeks” as a watch and “up to 24 hours” on GPS will cover heavy training weeks while charging every few days. The 945’s smartwatch time is also “up to two weeks,” but its standout is endurance: “up to 36 hours” for GPS runs, and “up to 10 hours” if you add music. Both offer UltraTrac for expedition‑length efforts, with Garmin listing up to 60 hours (50 with wrist HR enabled). These numbers are straight from Garmin’s published specs (links above).
Cameras & Sensors
No camera here, but lots of sensors. Both track wrist heart rate and pair with external ANT+ gear for chest straps, power meters, foot pods, and more. The 945 adds a pulse‑ox sensor for altitude acclimation and sleep readings, with controls and tips inside the manual, including an all‑day acclimation mode for mountain trips (pulse‑ox details).
Software & Updates
Both connect to the Garmin Connect app and the Connect IQ store for data fields and watch faces. The 945 layers in safety and mapping features that reshape daily use: incident alerts, assistance messages sent via your phone, and full‑color maps with ClimbPro for course‑based pacing on climbs. The 935 offers a map app for breadcrumb navigation and course following, which is handy, but the 945’s map suite is the better tool for trail days and travel (945 safety features).
Ports & Connectivity
Both pair by Bluetooth for phone features. Each can use Wi‑Fi for syncing workouts and software, and ANT+ for sensors. The 935’s manual even calls out Wi‑Fi uploads and auto updates, so syncing is quick after a session when you park near home Wi‑Fi (935 Wi‑Fi features).
ℹ️ Good To Know: The 945 includes Garmin Pay and on‑watch music; the 935 controls your phone’s player but doesn’t store tracks. If you want phone‑free long runs, that single difference can decide the purchase.
Pricing & Packages
When new, the 935 listed at $499.99 in the US and the 945 at $599.99. Today, both circulate mainly as used or refurbished units through US retailers, with the 935 often landing near entry‑level pricing and the 945 commonly appearing in mid‑range deal zones. Expect bundles to vary based on band color and accessory mix.
Price, Value & Ownership
In day‑to‑day use, the 935 wins on acquisition cost while the 945 wins on capability. If you value maps, phone‑free music, and safety, the price jump makes sense. If you just want long GPS and full multisport tracking, the 935 keeps dollars in your pocket.
Where Each One Wins
🏆 Maps & ClimbPro — Forerunner 945
🏆 Phone‑Free Music — Forerunner 945
🏆 Safety Alerts — Forerunner 945
🏆 Best Purchase Price — Forerunner 935
Decision Guide
✅ Choose Forerunner 935 If…
- You want long GPS time and a light watch without paying for maps or music.
- You plan to buy refurbished and keep the budget friendly.
- Your training uses ANT+ sensors and you prefer simple breadcrumb navigation for courses.
✅ Choose Forerunner 945 If…
- You want full‑color maps, climb pacing screens, and route confidence on the wrist.
- You run phone‑free with offline tracks and tap‑to‑pay at the finish.
- You value safety features like incident alerts and assistance via your phone.
Best Fit For Most Runners
If price isn’t the limiter, the Forerunner 945 is the smarter long‑term pick. You get longer GPS time, color maps with ClimbPro, phone‑free music, payments, and safety features. Those add up to a smoother daily routine and fewer compromises on race day. If budget comes first, the Forerunner 935 remains a strong training watch that still nails the basics.
Specs and features referenced above come from Garmin’s US manuals and product pages: battery life, media storage, water rating, maps, and safety tools are detailed in the Forerunner 935 and 945 documentation linked in this guide.