What are tides of the king

King Flood - King tide

Colloquial term for a particularly high spring tide, such as a Perigee spring tide.

A Royal flood is a particularly high spring tide, especially the Perigee spring tides, which occur three or four times a year.

King Tide is not a scientific term, nor is it used in a scientific context. The term originally comes from Australia, New Zealand and other Pacific countries to describe particularly high tides that occur a few times a year. It is now used in North America as well, particularly in low-lying South Florida where the king's tides can cause tidal flooding on sunny days.


King tides are the highest tides. They are naturally occurring, predictable events.

Tides are the movement of water across the surface of the earth caused by the combined effects of the gravitational forces exerted by the moon, sun, and the rotation of the earth, which are manifested in local sea level rise and fall. The tides are determined by the relative positions of the earth, the sun, the moon, land formations, and the relative position on the earth. In the lunar month, the highest tides occur approximately every 14 days at the new and full moons, when the gravitational pull of the moon and the sun are coordinated. These highest tides in the lunar cycle are called spring tides.

The proximity of the moon to the earth and the earth to the sun also affects the tidal areas. The moon moves in an elliptical orbit around the earth that lasts approximately 29 days. The gravitational force is greatest when the moon is at perigee - closest to Earth - and least of all when it is at apogee - furthest from Earth - about two weeks after perigee. The moon has a greater impact on the tides than the sun, but the position of the sun also has an impact on the tides. The earth moves in an elliptical orbit around the sun, which takes just over 365 days to complete. Its gravitational force is greatest when the earth is in perihelion in early January - closest to the sun - and least when the earth is in aphelion in early July - farthest from the sun.

The royal floods occur on the new and full moons, when the earth, moon, and sun are aligned with perigee and perihelion, resulting in the largest range of tides observed over the course of a year. So the tides are intensified when the earth is closest to the sun around January 2nd of each year. They are reduced around July 2nd when it is furthest from the sun.

The predicted heights of a royal flood can be further increased by local weather patterns and sea conditions.


General information

Inline quotes

External links