Where is the watch getting the temperature line you see in the full page listing of an activity? Is that your body temperature? What do you learn from or how do you use this information?
If you use a tempe, the data becomes useful.
While riding a bike, you can hide it beneath the seat, if running, the laces are working (if you aren't running into the sun for to long time)
When swimming, the interior sensor is working just fine, but this isn't a miracle. The heat transfer in water is much better than in air, so the watch cools down to water temperature fast. In the air, the body is heating it up faster than it can transmit the heat to the ambient air.
It measures the temperature of the internal mechanism used to calculate barometric pressure as the pressure measuring device will be affected by temperature so the watch needs to factor that into its calculation. Unfortunately Garmin does not seem to be able to make these devices consistent enough to be a reliable measure of temperature even if you eliminate body heat influence by removing the watch. I'm an openwater swimmer and it's nice to know if the water is 7. 5C, or 9C etc. Did a comparison test with Garmin Tempe, watch (fr745), food probe, and an alcohol based thermometer. The Tempe seems to consistently record 1C lower, the watch 1C higher while the probe and alcohol thermometer correlated. The probe had been calibrated for 0C previously. Perhaps Garmin could allow some sort if calibration exercise to be done by the user? Nice concept, poorly executed.
