South Beach is located on the east shore of Lake Michigan, in the southern part of the U.S. state of Michigan.This sand beach is within the resort city of South Haven, at the mouth of Black River, which separates South Beach and North Beach. The South Haven Light is located here. The address is Monroe Blvd, South Haven, MI 49090. We visited South Beach in September of 2019. #wanderingnursewhitlock