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Garmin heat acclimation doesn't work anymore. Fenix 6. GPS, Bluetooth is on.

Heat acclimation doesn't work anymore.

Two weeks ago, the acclimation was already at 40%.

But suddenly my Fenix 6 gives no report about heat acclimation. Acclimation is already by 0 %.

  • Does the weather widget on the watch show temperatures over 22°C (72ºF) now (and in the last days)? Was the activity intensive and long enough to have your VO₂max measured?

  • I'm.having the same issue. 80 minute run and the map says 26 Celsius but the acclimation drops from 4% to 1%. 

  • I'm.having the same issue. 80 minute run and the map says 26 Celsius

    Paradoxically, it does not really matter what the map tells. Only the temperature shown on the Weather widget of your watch during the activity is used for the acclimation. The temperature on the map comes from Google API, while the temperature on the watch is loaded through Garmin Connect from Garmin's whether data providers (if set up and working properly).