The Garmin Forerunner 255 Series includes the 255, 255S, 255 Music, and 255S Music running GPS watches with up to 14 days of battery life and multi-band GPS support. They feature HRV Status, Morning Report, and optional onboard music storage.
Version 27.09 - January 1, 2026: Fix some lag when scrolling in the activity summary menu.Fix some possible crashes during swim activities.Fix an issue where race time prediction could be miss…
Version 26.08 - November 12, 2025: Fix Find My Device alert not sounding if device is locked with the Passcode feature.Fix an issue with exiting pan/zoom mode on the map if activity is paused.Fi…
Version 25.06 - October 2, 2025: Fixed an issue causing the settings to be hidden for the first added custom alert.General stability improvements. Back to Top
Version 25.04 - September 11, 2025: Fix the Primary Race glance sometimes showing a secondary race.Fix Strength workouts not being marked complete in Garmin Run Coach plans.Improve some cases whe…
Version 24.12 - August 1, 2025: Improve on-device recovery options when PIN unlock attempts are exhausted.Fix a potential crash on the watchface.Fix an issue with event goals not updating on…
Version 23.20 - May 15, 2025: Support passcode security feature with wrist detection.Improve secure sensor pairing and updates.Update the bike camera controls widget to support Varia™ Vue s…
Version 22.24 - March 11, 2025: Fix smart notification tone option missing (non-music versions only).Fix scheduled workouts can show off by one day in some time zones.Fix completed Daily Sugg…
Version 22.22 - February 20, 2025: Adds support for HRM 200 pairing and data.Improvements to the Body Battery™ energy gauge accuracy when users have multiple devices.Improvements to Garmin Run C…
Update prediction
A firmware update was expected by October 20, 2026 but has not yet been released.
Garmin typically releases firmware updates for this product approximately every 76 days.
The Garmin Forerunner 255 Series includes the 255, 255S, 255 Music, and 255S Music running GPS watches with up to 14 days of battery life and multi-band GPS support. They feature HRV Status, Morning Report, and optional onboard music storage. It was originally released on June 1, 2022.
What is the latest firmware version of Garmin Forerunner 255 Series?
The latest firmware version of Garmin Forerunner 255 Series is 29.05. It was released on August 1, 2026.
Where can I download the latest Garmin Forerunner 255 Series firmware?
Details and download instructions for the latest Garmin Forerunner 255 Series firmware (version 29.05) are on Garmin's official release page: https://support.garmin.com/en-US/?faq=mDOQVSNIu36T6OddCKL4k9
How often does Garmin release firmware updates for Garmin Forerunner 255 Series?
We have tracked 10 firmware versions of Garmin Forerunner 255 Series. Based on historical patterns, updates are released approximately every 76 days.
Is the Garmin Forerunner 255 Series firmware update overdue?
Based on Garmin Forerunner 255 Series's historical update patterns, a firmware update was expected by October 20, 2026 but has not yet been released. This may indicate an upcoming release or a change in the product's update schedule.
Is Garmin Forerunner 255 Series still receiving firmware updates?
Yes, Garmin Forerunner 255 Series received a firmware update within the last year. The most recent version is 29.05.