I use weather.com, and plug in my city zip code then hit "details" and check the wind direction from there. One thing to keep in mind, from my stand locations I have noticed the wind can be in a completely different direction depending on the surrounding landscape contour. Just this past week, the wind was out of the southwest in general, but from my stand location it was out of the North sometimes! I hunt in a ravine with a small incline on the west side of my stand. I'm sure the wind was coming over the incline and creating a small whirlpool of air that from my location was moving out of the north.