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King Tides

What are King Tides?

The king tide is the highest predicted high tide of the year at a coastal location. It is above the highest water level reached at high tide on an average day. King tides are also known as perigean spring tides. In southeast Florida, these typically occur in the fall.  

What do King Tides Show?

King tides bring unusually high water levels, and they can cause local tidal flooding. Over time, sea level rise is raising the height of tidal systems. Average daily water levels are rising along with the oceans. As a result, high tides are reaching higher and extending further inland than in the past. King tides preview how sea level rise will affect coastal places. As time goes by, the water level reached now during a king tide will be the water level reached at high tide on an average day.

What dates are the King Tides expected?

King Tides normally occur a few times per year and often cause nuisance flooding in coastal and low-lying areas. More severe flooding may result if King Tides coincide with bad weather conditions such as heavy rains, strong winds, or big waves. However, sea level rise is causing these tides to happen more frequently, to last longer and extend further inland than in the past.

Based on the National Oceanic and Atmospheric Administration’s tide predictions, King Tides will occur on the following dates this fall:

  • September 16-22
  • October 14-21
  • November 13-18

Preparing for the King Tides

Most of the King Tide impacts are felt along the coast and in very low-lying areas near other water bodies. Residents who want to know which areas could potentially be impacted by the King Tides are encouraged to use some of the resources below which include NOAA Sea Level Rise Viewer and Miami-Dade County Flood Map

On the Miami-Dade County map you can zoom into your neighborhood and click on the "flood frequency tab" you will see areas in red that are vulnerable to King Tide flooding. 

Flooding can potentially obstruct access to roadways. If possible, move vehicles to higher ground before the King Tides begin and wash your vehicle down with fresh water after driving through salt water.

Residents can determine if home their lies in an area susceptible to other kinds of flooding using Miami-Dade County's interactive map.  

Residents in flood zones should prepare for flooding by having protection measures such as sandbags on hand, review their flood insurance policy, and make a plan for flood safety.  

Additionally, follow these safety precautions:

  • Do not walk through flood water if possible. It is can be a health hazard.
  • If you do need to walk through flood waters follow good hygiene practices and wash your hands, clothes, and pets after.
  • Do not drive through flooded areas - it is dangerous and can damage your vehicle.  Find an alternative route.
  • Boaters should be aware that high tides cause lower clearance under bridges - check the tide before leaving the dock.

Help the City document where flooding is happening as a result of King Tides by sending photos to

Additional Resources