Mystic Seaport Museum, an outdoor maritime museum on the East Coast, faces the increasingly disruptive impact of sea level rise on its riverfront property, impeding programs, threatening historic structures, and damaging infrastructure such as docks and utilities. In the midst of a global pandemic, maritime sites that practice public history need to increase their resilience to coastal threats by collaborating, being publicly transparent, and demonstrating the relevance of maritime heritage to our present and future.