I dont really matter to me. Some of the biggest deer I've killed has been in 20 + mph winds. Just killed a 7 pointer monday night in wind gusts of 40 mph. Theres only one way to know if the deer are moving and its not sitting on the couch looking at the tops of trees. Always keep a positive mind frame. I believe I am going to see deer everytime out no matter what the conditions and usually do. If your scared to sit in the tree in highwinds set up in a natural blind. Deer are unpredictable and if a buck is on a doe or their hungry the wind is not gonna stop them from chasing or eating. It may limit the movement but it wont stop it completly. If theres a forecast for 30 mph winds for 3 concecutive days you really dont think that the deer are gonna bed down for 72 hours do ya? Me eitherJMO