Show when, where, and how often high tide flooding may occur at specific locations. Coastal Condition Forecasts Nowcast and forecast (out to 48-72 hours) model information on water levels, currents, wind, salinity, and water temperature.

Choose a station using our Tides and Currents Map, click on a state below, or search by station name, ID, or latitude/longitude.

When the sun, moon, and earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very shallow low tides, both commonly called spring tides.

Caused by the gravitational pull of the moon and the sun, tides are very long-period waves that move through the ocean and progress toward the coastlines where they appear as the regular rise and fall of the sea surface.

16 小时之前 · High Tide Flooding (HTF) is defined as the overflow or excess accumulation of ocean water at high tide that covers low-lying areas, and typically 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.

Website Owner: Center for Operational Oceanographic Products and Services National Oceanic and Atmospheric Administration • National Ocean Service•

16 小时之前 · The sea level trends measured by tide gauges that are presented here are local relative sea level (RSL) trends as opposed to the global sea level trend. Tide gauge measurements are made with respect to a local fixed reference on land.

Disclaimer: The predictions from NOAA Tide Predictions are based upon the latest information available as of the date of your request.

At most locations, there are semidiurnal tides--the tide cycles through a high and low twice each day, with one of the two high tides being higher than the other and one of the two low tides being lower than the other.

NOAA is currently prototyping the ability to enhance the resolution of High Tide Flooding Outlooks with CORA-derived datasets. Future versions of NOAA’s Sea Level Calculator will also host CORA datasets to help coastal communities understand and plan for the impacts of flooding.