arkivoAPI
Menu

Mobile / Smartwatches

Garmin Forerunner 255

GarminSport smartwatch

Forerunner 255

Released June 2022.3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Release says Forerunner 255 and 255S are available now. Date of that release is June 1, 2022. Last checked 23 October 2026.

Case size
46mm
Platform
Proprietary
Display type
MIP
Battery life
336h

81 of 150 fields known.

Compare with another smartwatchDownload JSONDownload CSVGet it from the API

All specs

SourceCalculated

General

Series
Forerunner1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Product page title is Forerunner 255, running smartwatch, 46 mm.
Model numbers
010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US page for the 46 mm watch without music lists part number 010-02641-01 (Tidal Blue, $349.99). The Music toggle on the same page links the music watch to 010-02641-20, so music watches are other models. 255S is the 41 mm size, SKU 010-02641-02.
GTIN / EAN
Not available
Announced
1 June 20223Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Garmin release dated June 1, 2022.
Status
Not available
Predecessor
Not available
Successor
Garmin Forerunner 2658Reviewdcrainmaker.com/2023/03/garmin-forerunner-review-amoled.htmlRead 11 October 2026Review: the Forerunner 265 series at first glance seems like an AMOLED version of the Forerunner 255, with several hardware differences. It follows the 255 in the Forerunner line.10Maker product pagegarmin.com/nl-NL/blogRead 23 October 2026Garmin's Dutch blog says the Forerunner 265 is the successor of the Forerunner 255.
Launch price (US)
$349.993Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Suggested retail price $349.99 for Forerunner 255 and 255S. Music models are $399.99.
Launch price (EU)
€349.994Press articlenextpit.de/news/garmin-forerunner-255-und-955-vorgestellt-touchscreen-mehr-akkuRead 11 October 2026nextpit.de, 1 June 2022: the Forerunner 255 costs 349,99 EUR in every size, the Music edition 50 EUR more. German price incl. VAT.
Markets
US, DE3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026US release with US dollar suggested retail prices.4Press articlenextpit.de/news/garmin-forerunner-255-und-955-vorgestellt-touchscreen-mehr-akkuRead 11 October 2026German launch pricing in euros. Documented subset together with the US release.
Colours
Tidal Blue1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US store lists Tidal Blue for this model. Other regional colours exist but are not listed on this page.3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Release names tidal blue as a new colour.
Segment
Sport1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin presents it as a running smartwatch.
OS updates promised
Not available
Security updates until
Not available

Case

Front and side, drawn to scale.

Case size
46mm1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Case shape
Round1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs describe the display as a diameter and the pictured case is round.
Case material
Fibre-reinforced polymer6Reviewandroidcentral.com/wearables/garmin-forerunner-255-reviewRead 11 October 2026Review spec box: materials fiber-reinforced polymer. The maker lists only the bezel as fiber-reinforced polymer and no other case material.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: fiber-reinforced polymer bezel and case, silicone strap.
Case material (as published)
Fiber-reinforced polymer6Reviewandroidcentral.com/wearables/garmin-forerunner-255-reviewRead 11 October 2026Review spec box wording.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table wording.
Back
Not available
Case dimensions
Height45.6Width45.6Thickness12.9mm(1.8 × 1.8 × 0.5 in)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Physical size 45.6 x 45.6 x 12.9 mm. Not stated whether the heart rate sensor bump is included.
Weight (case only)
Not available
Weight with strap
Not available

Durability

Water resistance
5ATM1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Water rating 5 ATM.
Water resistance standard
Not available
Dust and water rating
Not available
Dive rating
Not available
Max dive depth
Not available
MIL-STD-810
Not available
MIL-STD-810 tests
Not available
Operating temperature
Min-20Max60°C2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Specifications page 101: operating temperature -20 to 60 C. Charging range 0 to 45 C is excluded.

Display

Display type
MIP1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Display type sunlight-visible, transflective memory-in-pixel (MIP).
Display type (as published)
Sunlight-visible, transflective memory-in-pixel (MIP)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Screen size
1.3in(3.3 cm)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: 1.3 inch (33 mm) diameter.
Resolution
260 × 260px1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: 260 x 260 pixels.
Pixel density
Not available
Display area
Not available
Touchscreen
No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026The manual describes control only with the LIGHT, UP, DOWN, BACK and START/STOP buttons and never mentions touch input.
Max refresh rate
Not available
Min refresh rate
Not available
Peak brightness
Not available
Minimum brightness
Not available
Always-on display
Not available
Display cover
Gorilla Glass1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Display cover (as published)
Corning Gorilla Glass 31Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Lens material Corning Gorilla Glass 3. Bezel material is fiber-reinforced polymer. Case material is not listed, so case_material is not stored.

Platform

Platform
Proprietary1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin watch software with downloadable Connect IQ watch faces, data fields and apps.
OS at launch
Not available
Software
Not available
Latest OS
Not available
Works with
iOS, Android1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Phone requirement
Not available
App store
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Connect IQ downloadable watch faces, data fields and apps and an on-device Connect IQ store.
Voice assistants
Not available
Chipset
Not available
Process
Not available
CPU cores
Not available
CPU configuration
Not available
Max CPU clock
Not available
GPU
Not available
Low-power coprocessor
Not available

Memory

RAM
Not available
Storage
4GB1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Memory/History 4 GB. The manual lists up to 4 GB of music storage for Music models only.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Music storage up to 4 GB applies to Music models.

Health sensors

Heart rate sensor
Garmin Elevate wrist heart rate monitor1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
ECG capability
No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: electrical heart rate No, ECG No. The Garmin product page lists no ECG sensor or app.
Blood oxygen sensing
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Pulse Ox blood oxygen, spot-check and optional all-day acclimation and in sleep. Not available in all countries.
Skin temperature sensing
No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026The manual describes an internal temperature sensor whose reading is affected by body temperature and offers an external tempe sensor for ambient temperature. No skin temperature function is described.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: skin temperature No. The Garmin page lists only a thermometer.
Blood pressure feature
Not available
Body composition sensor
Not available
Skin conductance (EDA)
Not available
Medical clearances
Not available

Motion and environment sensors

Accelerometer
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Accelerometer range
Not available
Gyroscope
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Barometric altimeter
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Compass
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Ambient light sensor
No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: ambient light sensor No. The Garmin sensor list has none.
Depth gauge
Not available
Depth gauge range
Not available
Water temperature sensor
Not available

Health and fitness

Health features
Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list heart rate every second, high and low abnormal heart rate alerts, Pulse Ox, HRV status, advanced sleep, all-day stress and women's health in Garmin Connect. Sleep stages are in the manual.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Sleep statistics include total hours of sleep, sleep stages and sleep score (page 42 area).
Fitness features
VO2 max, Training load, Recovery advice, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Trackback1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list VO2 Max (run), training load, recovery time, running dynamics, running power, pool and open-water swim metrics, automatic rep counting, interval training, course guidance and TracBack. Running dynamics need a pod or HRM-Pro. No golf course or ClimbPro entry.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Page 62: running power can be measured with a compatible running dynamics accessory or the watch sensors. Page 63: Running Dynamics Pod records running dynamics.
Sport profiles
Not available
Dive modes
Not available
External sensors
Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list heart rate from external HRM, power meter compatible, speed and cadence sensor support, foot pod capable and smart trainer control.

Safety

Fall detection
No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list only incident detection during select activities, which is limited to certain outdoor activities. Not counted as general fall detection.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Page 83: incident detection is a supplemental feature available only for certain outdoor activities.
Car crash detection
Not available
Emergency SOS
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Assistance. The manual says it sends a message with name, LiveTrack link and GPS location to emergency contacts through a paired phone with data. It does not call emergency services.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Safety and Tracking, page 84: Assistance sends a message with name, LiveTrack link and GPS location to emergency contacts. Paired phone with data plan required.
Emergency siren
Not available
Live location sharing
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list live event sharing (Android only). The manual lists LiveTrack.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Safety and Tracking: LiveTrack lets friends and family follow activities in real time.
Dedicated LED flashlight
No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Controls menu: Flashlight turns on the screen to use the watch as a flashlight. A lit display is not a dedicated LED.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: LED flashlight No, matching the manual.

Positioning

Positioning
GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list GPS, GLONASS, Galileo, QZSS and BeiDou. Multi-band GPS is listed. Signal bands are not named.
Dual-band GNSS
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Multi-band GPS. Battery table calls it All-Systems GNSS plus Multi-Band.
Offline maps
No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026No map entry in the specs. Only breadcrumb trail, courses and TracBack are listed, which are not offline maps.

Connectivity

Bluetooth
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Bluetooth version
Not available
Wi-Fi
No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Status icons: Wi-Fi technology status for Forerunner music watches only. The spec table lists no Wi-Fi for this model.
Wi-Fi standard
Not available
Wi-Fi bands
Not available
Cellular
No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Connectivity as Bluetooth and ANT+ only. No Wi-Fi and no cellular.
Network
Not available
4G bands
Not available
5G bands
Not available
NFC
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin Pay contactless payments are listed. NFC itself is not named in the specs.
Contactless payments
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin Pay is listed.
Payment services
Garmin Pay1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Ultra-wideband
No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: UWB No. Garmin lists Bluetooth and ANT+ only.
Satellite
Not available
ANT+
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Audio

Speaker
No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: speakers No. Garmin lists no voice calls, speaker or music playback for this non-music model.
Microphones
07Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: microphone No. Garmin lists no voice calls or microphone for this model.
Calls on the watch
None1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list text response and reject phone call with text only. No voice call, speaker or microphone entry and no cellular. No voice calls on the watch.
Music on the watch
No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Specifications page 101 lists music media storage for Forerunner music watches (Forerunner 255 Music). This model is the non-music watch.

Controls

Buttons
52Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview, page 2: LIGHT, UP, DOWN, BACK and START/STOP.
Named operating buttons
LIGHT, UP, DOWN, BACK, START/STOP2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview page 2. START and STOP share one button.
Crown
None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview shows five buttons and no crown.
Rotating bezel
None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview shows five buttons and no rotating bezel.
Gestures
Raise and turn your arm to turn on the backlight2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Backlight settings: Gesture turns on the backlight by raising and turning your arm to look at your wrist.

Battery and charging

Battery capacity
Not available
Claimed battery life
ModeWith solarHours (h)
SmartwatchNo336
GPSNo30
GPS, all systemsNo25
GPS, dual-bandNo16
Source1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Smartwatch mode up to 14 days (336 h). GPS-only GNSS up to 30 h. All-Systems GNSS up to 25 h. All-Systems plus Multi-Band up to 16 h. Manual footnote: smartwatch mode includes activity tracking, phone notifications and wrist heart rate.
Smartwatch mode (claimed)
336h
AOD battery life (up to)
Not available
GPS mode (claimed)
30h
Solar charging
No9Reviewdcrainmaker.com/2022/06/garmin-forerunner-multisport.htmlRead 11 October 2026Review covers the Forerunner 255, 255S, 255 Music and 255S Music with no solar model. Solar is introduced in this launch only on the Forerunner 955 Solar.
Charging method
Proprietary plug1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Garmin proprietary plug charger.
Charging guidance
Not available
Max charging power (watch)
Not available
Fast charging
Not available
Quick charge claim
Not available
Charge 0 to 80% (claimed)
Not available
Full charge time (claimed)
120min2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Tips for charging: charging a fully depleted battery takes up to two hours, from a Garmin approved AC adapter or a computer USB port. Stored as a nominal claim of 120 minutes with the up-to qualifier.

Measured

We could not find any of these 4 fields. Show them
Peak brightness (measured)
Not available
Battery life (measured)
Not available
Battery tests (measured)
Not available
Full charge time (measured)
Not available

Strap

Lug width
22mm1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: quick release bands, 22 mm, industry standard.
Quick-release strap
Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Strap system
Industry standard 22 mm quick release bands1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026
Strap material
Silicone1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Strap material silicone.
Strap
Not available
Strap sizes
Wrist (min) (mm)Wrist (max) (mm)
130205
Source1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: fits wrists with a circumference of 130-205 mm. This is the overall range for the watch with its supplied silicone strap.

Regulatory

FCC ID
Not available
SAR limb (US)
Not available
SAR limb (EU)
Not available
Other certifications
ANT+ certified2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Front matter: this product is ANT+ certified.

In the box

In the box
Forerunner 255, Charge/data cable, Documentation1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026In the Box tab: Forerunner 255, charge/data cable, documentation.
Power adapter in box
No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Box lists a charge/data cable and no power adapter.

Warranty

Manufacturer warranty (source market)
1year5Maker product pagegarmin.com/en-US/legal/consumer-limited-warrantyRead 11 October 2026Garmin consumer limited warranty, US: non-aviation products are free from defects in materials or workmanship for one year from the date of purchase.

Compare with

Pick a smartwatch to see both side by side. Differences are marked yellow.

More smartwatch comparisons

Sources

We read 10 sources for this smartwatch. The numbers match the markers in the sheet.

  1. Read 11 October 2026Backs 51 fields
  2. Read 11 October 2026Backs 20 fields
  3. Read 11 October 2026Backs 5 fields
  4. Read 11 October 2026Backs 2 fields
  5. Read 11 October 2026Backs 1 field
  6. Read 11 October 2026Backs 2 fields
  7. Read 11 October 2026Backs 9 fields
  8. Read 11 October 2026Backs 1 field
  9. Read 11 October 2026Backs 1 field
  10. Maker product pagegarmin.com/nl-NL/blog
    Read 23 October 2026Backs 1 field

See a wrong value? Tell us and name the field.