King Tides: a non-scientific term used to describe the predicted highest high-tide and lowest low-tide events of the year. King tides occur during a perigean (when Moon is closest to Earth) spring tide (full and new moon); in other words, a full or new moon must co-occur when the Moon is closest to Earth in its elliptical orbit. Due to their astronomical nature, king tides are regular and predictable events, reoccurring multiple times a year.
Amplified Tides: a non-scientific term to describe predicted higher and lower water level events that result when perigee and spring tides almost co-occur, yet are offset by a day or more.
Please visit our “What is a king tide?” webpage for more information.