If you’ve seen Avatar (seriously, who hasn’t?), you might remember the glowing forest, an idyllic place filled with trees and plants that shine in the dark.
While SoCal and Los Angeles aren’t Pandora, nature definitely gives us sights that look straight out of a movie. From amazing waterfalls to swimming holes, deserts, and snowy mountains, this area has it all—including glowing beaches caused by the phenomenon of bioluminescence.
Here’s how and when to see it!
Table Of Contents
- What is a bioluminescent beach?
- How do bioluminescent waves form?
- When to see bioluminescent waves in California?
- Where can you see bioluminescent beaches near L.A.?
- How can you fully enjoy the glowing waves in California?
- How to track bioluminescence in California?
- Red tides: key to see bioluminescence?
- Is it safe to swim in a bioluminescent beach?
- Will we see bioluminescent waves this year in L.A.?
- Is bioluminescence a rare or common phenomenon?
- Which other countries experience bioluminescence?
What is a bioluminescent beach?
A bioluminescent beach is a spot where the water lights up at night, thanks to tiny organisms like bioluminescent plankton. These little guys, usually dinoflagellates, glow because of chemical reactions in their bodies.
When you walk along the shore or splash in the water, you can see the waves sparkling or glowing in bright blues or greens. It’s a pretty magical sight and ideal for nighttime outdoor adventures, like kayaking or simply taking cool photos.
How do bioluminescent waves form?
Bioluminescence happens through a chemical process that enables living organisms to create light within their bodies. Various marine creatures, including certain fish, squid, tiny crustaceans, and algae, produce this glow to confuse predators, attract prey, or lure potential mates.
Humans can experience this incredible natural phenomenon during times of high bioluminescence, often linked to plankton blooms. At night, the bioluminescent sea glows when it is disturbed by breaking waves or splashes in the water!
According to the state’s official website, the most frequently observed type of marine bioluminescence in California is produced by a particular species known as Lingulodinium polyedra. When these dinoflagellates experience a significant bloom, they can illuminate the ocean with a brilliant glow at night,
When to see bioluminescent waves in California?
Bioluminescent plankton can be found in California waters year-round. However, significant bioluminescence events occur only when there’s a high concentration of these organisms. The prime time to witness such displays is typically from June to October.
Where can you see bioluminescent beaches near L.A.?
The closest beaches to Los Angeles where you can catch a glimpse of this amazing natural phenomenon are Laguna Beach, Newport Beach, Huntington Beach, Long Beach, and Encinitas. These spots often have favorable conditions for witnessing bioluminescence.
If you’re willing to go the extra mile, consider taking a scenic drive to San Diego, where the likelihood of seeing glowing beaches increases significantly. Popular locations like Mission Beach, La Jolla Shores, and Blacks Beach are known for their stunning displays of bioluminescence, making them well worth the trip.
How can you fully enjoy the glowing waves in California?
Now that you know when bioluminescent waves are most likely to appear, the next step is to visit a beach where the phenomenon may occur. Once there, find a dark spot away from any light pollution. The best conditions for viewing are usually before the moon rises, with some experts recommending two hours after sunset for the optimal experience. Allow your eyes to adjust to the dark, and use a red flashlight beam to preserve your night vision. This will help you fully appreciate the magical glow of the waves
How to track bioluminescence in California?
Though seeing this phenomenon is a must on your bucket list of things to do around L.A., tracking bioluminescence in SoCal beaches can be tricky and hard to predict.
Still, here are a few strategies to enhance your chances of witnessing this incredible sight:
- Check the social media profiles of local beaches or nature enthusiast groups, as people share photos and locations when bioluminescent events occur. Keep an eye on or track hashtags like #bioluminescent or #bioluminescence.
- Reach out to local environmental organizations or aquariums that may provide updates on plankton blooms and bioluminescence conditions. A good suggestion is to monitor the Southern California Coastal Ocean Observing System reports.
- Use weather apps to find nights with little to no moonlight, as darker conditions make bioluminescence more visible.
- Opt for more secluded beaches to avoid light pollution and crowds to get a better chance to actually see glowing waves.
Red tides: key to see bioluminescence?
While it’s not guaranteed, red tide is often a relatively reliable predictor that glowing beaches will appear at night. Red tides are linked to an algal bloom filled with dinoflagellates that react when disturbed by the water. During the day, the water may take on a deep red, brown, or orange hue due to its pigmentation. However, at night, the water transforms into a vibrant blue.
You can track the sea conditions and the presence of red tide through the State of California Water Quality Monitoring Council.
Is it safe to swim in a bioluminescent beach?
According to the Scripps Institution of Oceanography in San Diego, the Lingulodinium polyedra plankton can produce a toxin called yessotoxin, which affects the nervous system. However, this toxin is not produced in local populations. Still, some people may be sensitive to the air near red tide, which means other compounds might be impacting their health.
During a red tide, there’s often a lot of stuff in the water and increased activity from tiny organisms. Whether or not to swim during this time is up to you, but there are usually no public health warnings related to the red tide that often causes the bioluminescence phenomenon.
Will we see bioluminescent waves this year in L.A.?
Bioluminescent waves have been spotted along the L.A. coast in previous years, including the most recent sighting in October 2024. While most common in spring and summer, timing varies based on weather and ocean conditions that typically happen every year. It is likely that 2025 will also have glowing waves for us.
Is bioluminescence a rare or common phenomenon?
Bioluminescence is not extremely rare, but its visibility depends on specific conditions. It occurs regularly in certain areas where bioluminescent organisms we’ve mentioned above are abundant. So if you catch some glowing waves, make sure to snap a picture because you probably won’t see it twice!
Which other countries experience bioluminescence?
The phenomenon of bioluminescence is not exclusive to California or the United States. It occurs in many parts of the world, mainly in coastal areas where certain species of marine organisms, such as dinoflagellates, phytoplankton, and jellyfish, produce natural light. As National Geographic explains, some countries and places famous for their spectacular bioluminescent displays include:
- Puerto Rico, Caribbean
- New South Wales, Australia
- Krabi, Thailand
- Matsu Islands, Taiwan
- Oaxaca, Mexico
- Wales, UK
