The Bermuda race is traditionally broken into three parts, the race to the north wall of the Gulf Stream, the Stream, and the race from the Stream to Kitchen Shoals. Really the Gulf Stream is the obstacle on the race course. I have only sailed 12 races, (my first in 1966) but I have still managed to see many unusual events.
Click HERE to see an animated view of the stream so far this year. It is what has already happened so it will not be much help for what will occur in June, but shows just how much change can happen.