I don't know if cold water affects leash knot performance, but I can state unequivocally that cold water affects my balloon knot performance. I find it extremely difficult to push out a pine cone immediately after a cold water session.
Yeah, I saw some scary looking guy with neck tattoos toss it in the ocean. He then waved and rode off on his bicycle. You might want to call the sheriff.
then rode back to his double wide no doubt, where his girlfriend (neck tattoo's and slightly less dental prowess) was finishing up a fresh batch of home cooked meth.