Compass not correct

I had this happen once awhile back. I eventually removed the compass widget from my watch, reinstalled it and it finally calibrated correctly and has been fine since.  Maybe this will work for you too. 

Would you please explain a little more detailed about the issue and what you have done so far. What means "way out", North points to real South?

Which compass settings are used?

Be sure that you aren't near a magnetic field, e.g. electric applicances etc.

Since the magnetic compass is orientation dependent the watch face should point upwards to the sky direction.

Its out by around 90 degrees. Ive stood in the middle of a large field to calibrate. I've deleted the widget and reinstalled. Still out by 90 degrees. I know its wrong from where the sun sets and rises and using my orienteering compass 

Try to calibrate the compass by moving it in your hand as described in the video

https://www.youtube.com/watch?v=UGkRq5sSkW4

and try different settings, e.g. North Ref. => True/Magnetic

https://www8.garmin.com/manuals/webhelp/fenix66s6xpro/EN-US/GUID-6D64DCD4-8FA6-44D9-A863-B7A634CE0821.html

I have the same problem.  Currently on my 3rd watch after returning 2, the current one came directly from Garmin.  Interestingly the compass on this one worked out of the box, but the altimeter was out. As soon as I calibrated that with GPS + DEM the compass immediately went out by more than 90 degrees.  The problem is currently logged with Garmin support.  And yes I have done all the calibration stuff stood in the middle of a field away from anything.

Hello, I encounter the same issue on my Garmin 6 std, my compass shifting by 80/90°, south instead of east.

I asked Garmin a week ago but they do not answer...

I did all the setup, my nothing....

This fix worked for me too

I forgot to specify that I had the last firmware 12.20

I've had to calibrate mine a few times since the last update.