if you want to compare the direction of the two vectors, you need to do an inverse cosine calculation (ACos node) between the dot product of the two directional vectors.
Id suggest getting the forward vector of your craft, and the forward vector of your wind, and comparing them with this formula:
I am not sure what you wanted, but if you wanted the angle between 2 vectors, you can always do a Dot Product (Normalise), & it will return angle between 2 vector.
NormaliseVector1 . Normalisevector2=x ("." is dot product)
AngleBetweenvectors= Cos-1(x)
All of the above operation nodes are available in blueprint.
Edit:RennJan was faster than me, haha, but we have same solution. I only saw his post asfter I posted.