The currently quoted number in policy papers is around 1 meter in the next 100 years. The includes the assumption that sea level rise is accelerating beyond historical trends.<p>For fun, you can get sea level rise satellite data for the past 20+ years from <a href="http:&#x2F;&#x2F;sealevel.colorado.edu" rel="nofollow">http:&#x2F;&#x2F;sealevel.colorado.edu</a> and run your own math. If you just naively run forward the observed rate over the last 22 years, you get 1 meter of rise in 300 years.<p>You can also see historical tide data for cities here <a href="http:&#x2F;&#x2F;tidesandcurrents.noaa.gov&#x2F;sltrends&#x2F;sltrends_station.shtml?stnid=8518750" rel="nofollow">http:&#x2F;&#x2F;tidesandcurrents.noaa.gov&#x2F;sltrends&#x2F;sltrends_station.s...</a><p>It&#x27;s important to know that tide data combines sea level information with information on how much the city is sinking. A bedrock city like NYC will give you better data on sea level rise than  a city built on mud, like Venice, which is going into the water even if global sea levels were falling instead of rising.