This is the 13071st most frequent Swedish word.
tempen
"Tempen" is a colloquial Swedish term meaning "the temperature."
The word 'tempen' refers to the temperature, here of the water, and is a colloquial abbreviation of 'temperaturen'.
Jag måste kolla tempen på vattnet innan jag badar.
I have to check the temperature of the water before I swim.
The word 'tempen' metaphorically represents the current state or mood in this context, derived from using 'temperature' to denote intensity or progress.
Hur är tempen på projektet just nu?
How is the status of the project right now?
The word 'tempen' literally refers to the air or environmental temperature in this sentence.