This summer, California’s coastline is set to witness a significant rise in juvenile great white sharks, a phenomenon linked to unusually warm waters and a strong El Niño. While experts anticipate the highest numbers of these apex predators in a decade, they urge the public to remain calm, reassuring beachgoers that humans are not part of their diet.
A Surge of Juvenile Sharks
The Pacific waters off La Jolla, California, are now home to a growing population of young great white sharks, measuring between 6 and 9 feet in length. These sharks have migrated northward from Mexico, driven by rising sea temperatures. Research indicates that such movements are typical during strong El Niño events, echoing patterns observed during the last similar occurrence in 2015 when shark numbers doubled along the California coast.
Dr Chris Lowe, the director of the Shark Lab at California State University Long Beach, has dedicated over two decades to studying white sharks. He emphasises that while this summer may see unprecedented shark activity, there’s no cause for alarm. “Humans don’t look, sound, or smell like prey to white sharks,” he explained. “If it doesn’t feel like prey, they ignore it. It’s not a threat, it’s not food.”
Rare Shark Encounters
Despite the influx of juvenile sharks, incidents involving shark bites in California remain remarkably low. Since 1950, there have been a mere 250 recorded shark encounters, resulting in only 17 fatalities. This translates to about 2.5 fatal bites per decade, a figure that has remained consistent over the years. Such statistics highlight the rarity of dangerous interactions between sharks and humans.
Lowe’s team has conducted extensive research on shark behaviour around water sports enthusiasts. In a recent study, scientists recorded sounds made by surfers, swimmers, and kayakers, then played these sounds back to sharks in their natural habitats. The results were telling: while sharks showed little interest in the sounds of surfers or kayakers, they did respond to the splashing noises made by swimmers. However, even then, the sharks would typically investigate briefly before swimming away, suggesting they do not perceive humans as prey.
Comparative Risks in Different Regions
Interestingly, the patterns of shark bites vary significantly across regions. Florida, often dubbed the shark bite capital of the world, sees a different species of sharks, such as blacktips, that are more prone to unprovoked bites. In 2025, Florida recorded 11 incidents of shark bites, accounting for 44% of all reported cases in the United States. In stark contrast, California’s recent rise in juvenile white sharks does not correlate with an increase in attacks.
Gavin Naylor, director of the Florida Program for Shark Research, points out the differences in shark behaviour across species. “A white shark is about as different from a blacktip shark as a kangaroo is from a dog,” he said. “You cannot compare bites in California with bites in Florida.” He further noted that the larger sharks found near Australian coastlines contribute to higher bite statistics there compared to California.
Understanding Shark Behaviour
Despite the reassuring statistics, Lowe acknowledges that the science surrounding shark bites is not fully understood. Mistaken identity is often cited as a reason for unprovoked attacks. In California, the rarity of bites might suggest that white sharks are quick to learn from their interactions with humans. “Maybe the sharks that mistakenly bite people haven’t been around people much, or maybe they don’t make mistakes very often,” he speculated.
For those venturing into the ocean this summer, Lowe’s perspective on safety has evolved significantly over the years. “Flash forward 20 years … I swim with these white sharks every day and I have no qualms doing it because of the data that we collected,” he stated, highlighting the importance of research in reshaping public perception about these creatures.
Why it Matters
As the summer approaches, understanding the behaviour of juvenile great white sharks is critical for both safety and conservation. By recognising that these sharks are far more interested in their natural prey than in humans, beachgoers can enjoy California’s stunning coastlines with greater peace of mind. Promoting awareness and informed responses to shark sightings not only enhances public safety but also fosters a more respectful relationship with these vital marine predators.
