If the tree is swaying back and forth I'm not hunting, and it only takes a 10 to 12mile an hour wind to do that.I have a couple of big white oaks I have stands in for windy days. I would say if the wind gets close to 20 mph. then I'm not hunting even them. If I just had to hunt that day, then I would get on the ground. I don't like hunting windy days anyway, but I will. If that tree is swaying, I don't won't to take a risk at a bad shot and wounding a deer.