Garmin GPS Not Accurate

This guide is for a Garmin watch whose GPS track wanders, whose distance comes out too long or too short, or whose pace and speed jump around. This covers device settings only and isn't medical advice. For problems with the watch itself, such as pairing, syncing or battery, start at Garmin watch troubleshooting. If the watch won't sync, fix Garmin watch data not updating in the app first, because a sync is also how it gets fresh satellite data. Sleep data is a separate topic: see how to track sleep on Apple Watch.

A Garmin watch records your route as a series of GPS points. Under clear sky conditions, Garmin says its devices "typically record your position within about 3 meters (10 feet) of your actual location," and that figure applies to each point, so small wobbles in a track are expected. Indoors or in a tunnel, the signal may be lost completely until the watch has a clear view of the sky again. Garmin's activity tracking notice adds that Garmin wearables "are not medical devices."

Why Your Garmin GPS Track Looks Wrong

Garmin's GPS guidance points to five causes:

1. GPS drift. Drift is the difference between your actual location and the location the watch records. In Garmin's example, a hiker who stopped without pausing the activity got extra distance while standing still.
2. Your surroundings. Canyons or mountainous terrain, tall buildings (an "urban canyon"), dense tree cover, and indoors or tunnels can weaken or block the signal.
3. Starting too soon. When the watch first shows GPS is ready, it has only the minimum number of satellites it needs to find your location.
4. Stale satellite data. Outdated GPS Location Data slows the first fix, especially after 100 miles of travel since the last GPS use, two weeks without a sync or a GPS signal, or a reset.
5. Settings. GPS switched off in the activity's settings, an indoor activity profile, Smart Recording, or GPS Only in a place where Garmin says multiple satellite systems perform better.

How to Fix Your Garmin GPS Track

These follow Garmin's own order; the restart comes last.

Fix 1: Let the Watch Find More Satellites First

Garmin's first recommendation is to give the watch time to strengthen its signal:

1. Go outside to an open area, away from tall buildings, dense tree cover and patio covers. Normal cloud cover doesn't affect the signal.
2. Start an outdoor activity on the watch.
3. When the watch shows GPS is ready, wait a few moments before you start the activity. Garmin calls this a "GPS soak": the extra time lets the watch connect to more satellites.

Fix 2: Turn On Auto Pause and Every Second Recording

Garmin says recording GPS while you're stopped is one of the biggest contributors to distance errors in an activity, so turn this on first:

1. Turn on Auto Pause. The watch then pauses when you stop moving and resumes when you start again.
2. Use Every Second recording, which records GPS data every second, instead of Smart recording, which records at variable intervals to save memory. Garmin says some devices offer both.
3. On routes with significant elevation changes, turn on 3D Speed and 3D Distance, which account for changes in elevation.

On a fēnix 8, Auto Pause, 3D Distance, 3D Speed and Satellites all sit in the activity settings: from the watch face, select Activities, select an activity, then open its activity settings. For other models, Garmin points to the owner's manual for the steps.

Fix 3: Sync Your Garmin Watch

Syncing refreshes the satellite data the watch uses to find its position:

1. Sync the watch with the Garmin Connect app or the Garmin Express program. Garmin says this "updates it with the latest available GPS Location Data."
2. Sync regularly. After two weeks without a sync, or more than 100 miles of travel since the last GPS use, a sync updates the satellite data so the watch acquires a signal much faster, Garmin says.

If the watch won't sync at all, the Garmin watch not syncing guide linked above covers the connection.

Fix 4: Update the Watch Software

Garmin's slow-signal steps pair syncing with current software:

1. Check for and install updates with Garmin Express on a computer.
2. On a fēnix 8, the watch also checks for updates on its own when it's paired with a phone over Bluetooth or connected to Wi-Fi.

How to update your Garmin watch has the full steps for each route.

Fix 5 (Last): Restart the Watch

Turn the watch off and back on. Garmin says a power cycle can often clear a temporary glitch. The buttons differ by model, so Garmin tells you to consult the owner's manual for how to restart yours.

By Satellite Mode and Model

Your watch's satellite options decide how hard it can work in difficult places, and Garmin lists them per model.

Which Satellite Mode to Use

Garmin describes four satellite modes on its watches. On a fēnix 8, you pick the mode per activity: the Satellites setting in the activity settings "Sets the GNSS satellite system to use for the activity."

Mode	What Garmin says it does	Trade-off
GPS Only	Uses the GPS satellite system only	Uses battery more slowly than multiple systems
All Systems	Uses multiple satellite systems for "increased performance in challenging environments and faster position acquisition"	Can reduce battery life more quickly than GPS Only
All + Multi-Band	Uses multiple systems on multiple frequency bands for "more consistent track logs" in challenging environments	Garmin's page gives no separate battery figure
UltraTrac	Records track points and sensor data less frequently	Longer battery life, lower-quality recorded activities

Garmin's per-model list shows which of these your watch has:

Watch	Satellite options (Garmin's list)
Forerunner 265 series, Forerunner 570, Forerunner 970	GPS Only, All Systems, All + Multi-Band, UltraTrac
fēnix 8 series, Instinct 3 series, Venu 4 series	GPS Only, All Systems, All + Multi-Band, UltraTrac
Forerunner 165 series, Forerunner 170 series	GPS Only, All Systems, UltraTrac
vívoactive 5, vívoactive 6, Venu 3 series	GPS Only, All Systems
fēnix 9 series	Four modes under new names

The fēnix 9 series adopted new names for these modes; Garmin's satellite options page maps each new name to the old one.

No Distance or Speed at All

Start with the activity profile. Garmin says most indoor activity profiles disable GPS by default, so switch to an outdoor activity profile. Then check that GPS is enabled in the activity's settings, and check the sensors menu to make sure any speed sensor is connected. For running, certain Garmin HRM chest strap sensors can calculate distance, speed and pace without GPS.