what is a king tide and when does it occur
A king tide is an extra-high high tide that happens when the Sun, Moon, and Earth line up in a way that maximizes their combined gravitational pull, producing the highest naturally occurring tides of the year.
What is a king tide?
- The term “king tide” is informal, not a strict scientific term, and is commonly used to describe especially high spring tides.
- These tides occur when normal high tides are boosted by the Moon being closer to Earth (perigee) and, in some cases, Earth being closer to the Sun (around early January in each year).
- King tides can cause “sunny day” or nuisance flooding in low‑lying coastal areas, even without storms, because water levels briefly rise well above typical high tide lines.
When do king tides occur?
- They typically occur a few times a year, often three or four events, during new or full moons when the Earth, Moon, and Sun are aligned and tidal forces are strongest.
- Many locations see their most notable king tides in certain seasons; for example, parts of the U.S. often experience them in fall and winter, when astronomical conditions and local weather can combine to raise water levels further.
- Exact dates vary by location, so king tide calendars and tide tables published by agencies like NOAA or local coastal programs are used to predict them for specific coasts.
Why king tides matter now
- King tides give a preview of how regular high tides may look in the future as sea level continues to rise, making them a useful “natural experiment” for planners and communities.
- During king tides, coastal roads, neighborhoods, and infrastructure that rarely flood can go underwater, so they often appear in local news and community photo projects documenting flooding impacts.
Information gathered from public forums or data available on the internet and portrayed here.