Get ready, Southern California! King tides are rolling in this Thursday, bringing with them a spectacular display of nature's power. But it's not just about the waves; these tides offer a crucial glimpse into our coastal future.
King tides, also known as perigean spring tides, happen when the sun, moon, and Earth align, amplifying the gravitational pull on our oceans. This week, we're in for a treat as the last supermoon of 2025, the 'Cold Moon', makes its appearance. This full moon, named for the longer, colder nights approaching the winter solstice, will be a sight to behold.
Mark your calendars: the king tides will peak on Thursday, continue into Friday, and return on January 2nd and 3rd.
The National Weather Service has issued a warning, urging beachgoers to stay out of the water due to hazardous swimming conditions, including dangerous rip currents. They also advise staying away from rocks, as they can be particularly treacherous.
But here's where it gets interesting: these high tides aren't just a spectacle; they're a preview of what's to come. They provide invaluable data on rising sea levels, offering a window into the future. By 2050, the California coast could see a median sea level rise of up to 1.2 feet, and by 2100, a staggering 6.6 feet. This is largely due to climate change, where increased carbon dioxide from burning fossil fuels traps heat, melting glaciers and ice sheets.
Understanding these changes is critical for planning safer coastal communities and developing appropriate infrastructure.
So, what exactly causes a king tide?
King tides occur when the gravitational forces of the sun and moon align, causing the ocean to bulge more than usual, especially during a new or full moon. These are called “perigean” spring tides when they coincide with the moon being at its closest point to Earth.
Important Note: King tides are a natural, predictable phenomenon and are not directly caused by climate change.
What can you expect to see?
Simply put, higher high tides and lower low tides. But because these high tides can reach 1 to 2 feet higher than average, they provide a tangible view of future sea level rise.
But be warned: what are the dangers?
High tides can be dangerous, potentially sweeping people offshore and capsizing small boats. They can also cause flooding, beach erosion, and even cliff collapses. The National Weather Service's beach hazards warning is in effect through Saturday, covering areas like the Santa Barbara County coastline, the Malibu coast, and Los Angeles County beaches, where tides are expected to reach 7.2 to 7.8 feet. Coastal areas in San Diego and Orange Counties can expect elevated surf up to 5 to 6 feet, while the San Francisco Bay Area may see breaking waves up to 14 feet high.
For detailed information on tides and currents, check the National Oceanic and Atmospheric Administration website.
How can you safely enjoy the king tides?
Despite the risks, you can still witness this impressive event safely. The California King Tides Project offers opportunities to observe and participate. You can take photos around high tide and upload them to a tide map. These images help visualize future sea levels and flood risks. Remember to be cautious on slippery surfaces, keep your distance from the waves, and always be aware of local beach conditions. And a final, crucial reminder: never turn your back on the ocean!
To catch a glimpse of the Cold Moon, look to the eastern horizon around moonrise on Thursday, around 4:20 p.m. in Southern California. The moon illusion will make our satellite appear larger as it rises.
What do you think? Are you planning to observe the king tides? Do you have any concerns about rising sea levels in your area? Share your thoughts in the comments below!
