No oily water. Just occasional cold water. Really really cold water. And occasionally warm water where I wanted to park myself.Cold pockets of water at depth are normally from fresh water springs coming from under ground rivers ashore. They happen all year long and if big, normally appear as "oily water" at the fresh water/salt water interface. I can't think of any topside weather to cause such a thing. i've run into them many times and in summer find them refreshing.
Dave Dillehay
Aldora Divers