I apologize if this has been covered a dozen times over, but in case it helps someone like myself I want to share this info. I had a strange wind noise coming from around my A-pillars/side mirrors that was a buffeting sound similar to loose trim- kind of like if you had a couple small birds tethered to the outside of the car and at speed their tiny wings would beat against the pillar.
I didn't notice it until summer weather, when warm it was significantly worse. Usually started around 55, and would be exacerbated depending on wind direction or however foul my mood was. It was bad enough I that we would take my wife's car on trips requiring any lengthy freeway distance. I probably used an entire roll of painters tape trying to discover where the issue was originating.
Tesla insisted the car was in-spec, and more than once stated they could hear nothing. I thought I may have to sell the car, I like driving above 50 mph. Finally this last trip to the dealer someone figured it out. An inch of thin black foam behind each tire between the wheel well cover and the fender has solved this wind noise. Maybe they added more than that, but from what I can see that's all they appeared to do. I would have sworn the issue was located closer to the A-pillar. I'm in love with my car again, and ready for a long trip.