Water temps aside, if the eye is close to the coast, a hurricane will typically begin to lose intensity. I honestly don’t know what would be considered warm for the Atlantic off Cape Cod, the few times I’ve been in the area it seemed pretty cold in summer to me.
Don't know where you're from but I've lived here all my life.While hurricanes,bad ones at least,aren't common here they're not unheard of either.I certainly ain't no expert on the topic but I always thought that hurricanes derived their power from warm ocean water.Of course I could be 100% wrong on that however.