New tempest install reporting 4mph wind with 9mph gusts in dead-calm

I just put up a tempest in my yard, and it’s reporting 4mph winds with 9mph gusts and it’s dead-calm outside. Any thoughts on how to calibrate a new installation? It’s on an 8’ pole in a fairly open location.



Can take it down and place it inside where it’s absolutely dead air, then observe if it still records air movement?

That will let us know where the problem mat be.


As Gary mentioned, a good way to test but remember you’re using a system with no moving parts … no friction, instant measure every 3 seconds … you’d be surprised …what we ‘feel’ as dead calm is sometimes still flowing. When I look at my trees in the garden, I think I don’t see a leave move but there is still some airflow. Very little but it is there. I once tested it by standing next to the Tempest and waited with the app open. I saw little gusts but didn’t feel anything … then I spayed my arm wet and then all of a sudden I felt the little gusts (the humidity made it so that I felt the temperature chill …)


Does the Tempest do wind self-calibrations out of the box, where it needs a few days of seeing winds from all directions to dial itself in???

yes i does some balancing of the sensors after a powerup, but it needs some wind to do that. So my advise is first to wait a few more days before doing anything else.

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I’m pretty sure that this also applies to the Tempest wind sensors:

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Have been having Tempest wind problems too since I received it. In still air, constantly measures 4 kph.

As suggested by WF, have started testing Tempest in a sealed closet with no airflow this morning (taped edges). It’s still measuring 4 kph, so we know something is up. Will leave it in there for the day to see what happens.