6 feet (1.8 metres)

He said sea levels could rise six to nine feet by the end of the century. “We’re not talking the 20 feet that would be necessary to submerge Manhattan. But the Jersey shore of my youth will not exist we continue on this course.”

(Dr Michael Mann, director of the Earth System Science Center at Pennsylvania State University) WFMZ News, 1 May 2013, “Dr Michael Mann warns global warming will create a fundamentally different planet.”

see also – sea level