Great white sharks can detect the sounds of swimmers, surfers, and kayakers from approximately 100 feet away [1].
This auditory capability means sharks may sense human presence in the water long before the swimmers notice the predators. As beach activity increases during the summer months, the intersection of human recreation and shark hunting patterns leads to more frequent encounters.
Marine scientists studying auditory abilities said that these sharks possess acute hearing that allows them to track movement through sound [1]. This sensory advantage is particularly effective in the coastal waters where many people swim and surf.
Sightings of great white sharks have risen this summer along U.S. coastlines [2]. Along the Massachusetts coast specifically, dozens of sightings were logged during June and early July [2]. Other notable areas of activity include California’s Lovers Point [3].
Researchers said that the increase in recorded sightings is partly due to the higher volume of people on beaches this season. The combination of increased human presence and the sharks' ability to hear splashing from a distance creates a higher probability of sightings [1], [2].
While these encounters often result in no harm, the ability of the sharks to detect sound from 100 feet [1] underscores the importance of situational awareness for those entering the ocean. Scientists continue to study how these auditory triggers influence shark behavior and whether specific sounds are more attractive to the predators than others.
“Sharks can detect the sounds of swimmers, surfers, and kayakers from roughly 100 feet away.”
The data suggests a sensory mismatch between humans and sharks; while humans rely primarily on sight to detect predators, sharks utilize a sophisticated auditory range to locate prey. The surge in sightings along the Massachusetts and California coasts indicates that seasonal migration and peak tourism are coinciding, increasing the frequency of these auditory-driven encounters.
