But soon we'll be 10% into the 21st century. Have the oceans risen a foot or two over the last decade?

Mount Desert Islander - Sea-Level Rise 65: New Age

The expected total rise in sea level by 2100 then ranges from 9.3 to 19.5 feet. Say 10 to 20 feet.

And that is only a rough approximation because no one knows how the global warming scenario is going to unfold. A ten-foot rise in sea level in a hundred years is 1500% greater than the 8-inch rise in the 20th century. That’s a devastating tsunami in slow-motion. And also an extremely conservative estimate.