The State of High Tide Flooding and Annual Outlook

High-tide flooding, often referred to as "nuisance" or “sunny day” flooding, is increasingly common due to years of relative sea level increases. It occurs when tides reach anywhere from 1.75 to 2 feet above the daily average high tide and start spilling onto streets or bubbling up from storm drains. As sea level rise continues, damaging floods that decades ago happened only during a storm now happen more regularly, such as during a full-moon tide or with a change in prevailing winds or currents.

NOAA documents changes in high-tide flooding patterns from the previous year at 97 NOAA tide gauges along the U.S. coast, and provides a flooding outlook for these locations for the coming year, as well as projections for the next several decades.

The State of High Tide Flooding and the Outlook through April 2022

Coastal communities across the U.S. continued to see record-setting high-tide flooding in 2020, forcing their residents and visitors to deal with flooded shorelines, streets and basements — a trend that is expected to continue into 2022.

See below for the high tide flooding trends and outlooks for each tide station monitored by NOAA.

To utilize the CO-OPS Derived Product API to download data from this report Click Here.