Lead author on the report and NOAA oceanographer William Sweet ties the flooding to one of the effects of climate change.
The National Oceanic and Atmospheric Administration says Wilmington had 14 days of high tide flooding in the past year.
NOAA's report predicts that in 30 years, the northern Outer Banks will have 55 to 135 days of high tide flooding, depending on greenhouse gas emissions.
NOAA scientists predict the southeast could see a 190% increase in flood days next year compared to 2000, the highest of any region.
Coastal communities experienced a median of five days of high tide flooding past year, tying the record set in 2015.
The report projects that, by 2050, the United States will experience 25 to 75 days of high-tide flooding.
The agency says the level of sunny day flooding in the USA has doubled since 2000.
"We can not wait to act", said Nicole LeBoeuf, NOAA's National Ocean Service acting director. He added that sea levels are rising at a rate of about 3 millimeters annually, or roughly an inch every eight years.
The study noted floods interfering with traffic in northeast states, swamping septic systems in Florida and choking DE and Maryland coastal farms with saltwater.
The predictions for Reedy Point are lower, with up to 15 days of high-tide flooding expected there in 2030 and up to 100 in 2050.
Brevard County had four flood days past year.
"It doesn't mean you didn't experience water in the street ... it's just in terms of the severity of the flood we're tracking. we're tracking a slightly deeper, more severe impact", Sweet said. "It's sometimes called 'nuisance flooding, ' but it has real impacts and costs".
The new report shows high-tide flooding was most prevalent a year ago in the Northeast Atlantic region, with records set in the Chesapeake Bay.
The report cited the disruption of commerce in downtown Annapolis, Maryland, where parking spaces are lost to flooding.
The report's statistics cover May 2018 through April 2019.
The agency forecasts sunny-day flooding this year in Boston at 12 to 19 days (it had 19 last year).