King Tide Alert: Fall 2021 Higher Than Normal Tides Are Upon Us

Coastal areas of northeast Florida and southeast Georgia can anticipate at least two spells of king weather this fall, according to NOAA.

JACKSONVILLE, Fla. — Living across the First Coast, we’re no strangers to puddles and even temporary mini-lakes that can appear during or after heavy rain. People who frequent places like Atlantic Beach or historic St. Augustine even know how high tides can sometimes mean water in the dunes or rushing through the streets.

This year’s royal autumn tides are upon us, but what are they and what does it mean for our beloved home?

For starters, a royal tide is an unscientific term that people often use to describe unusually higher than normal tides. Spring tides are the highest predicted high tide cycles of the year at a given coastal location.

According to the National Oceanic and Atmospheric Administration, “Higher than normal tides typically occur during a new or full moon and when the moon is at its perigeeor during specific seasons across the country.”

“Spring tides bring unusually high water levels and can cause local tidal flooding, says the Environmental Protection Agency. “Over time, sea level rise increases the height of tidal systems. Average daily water levels rise with the oceans. As a result, high tides are reaching higher and extending further inland than in the past. Spring tides provide insight into the impact of sea level rise on coastal areas. Over time, the water level currently reached during a high tide will be the water level reached at high tide on an average day.”

Sea level rise will make today’s high tides tomorrow’s daily tides.

NOAA’s 2021 High Tide Bulletin lists high tides for the Southeast as follows:

During these times the tides will be higher than normal as a perigee spring tide will occur. This is when the moon is new or full and closest to Earth. Higher than normal high tides and lower than normal low tides will occur.

High tides are also due to generally higher mean sea levels in early fall due to warmer, expanding ocean water and changes in weather patterns.

Coastal areas can expect minor tidal flooding, especially in low lying areas. If a storm occurs at this time, an increased level of tidal flooding and coastal erosion may occur. For example, if the First Coast were to see a northeast around the same time as the high tides.

The City of Atlantic Beach and the City of St. Augustine also posted on their Facebook and Twitter accounts to warn residents in advance of the fall 2021 royal tide forecast.

Did you know, AB? : FALL ’21 KING TIDES ARE ON US King tides are exceptionally high tides that occur when the orbits…

posted by City of Atlantic Beach, Florida – Government to Wednesday, September 22, 2021

If you experience royal tides in your area and would like to share what it is like during high tide times, you can share your photos, videos or reports with us on our First Coast News Weather Watchers Facebook group.

You can also report water levels to our local National Weather Service office in Jacksonville.

Back To Top