Areas with heavy swells seem to be particularly vulnerable.
I can remember some huge 30' swells in the Pacific with
a period of 2 minutes. I'd think big swells near a place like
Sable Island and or the Gulf Stream could produce rogue
waves.
There must be some sort of seasonal incidence of rogue
wave.
I was unable to find a plot of the locations of mysteriously
lost ships worldwide. I saw one a few years ago online.
Bob Crantz wrote
http://www.enviroliteracy.org/article.php/257.html