 Rip currents are responsible for most rescues by lifeguards and are the most difficult hazard for visitors to recognize. They look like the calmest place to swim from the beach but are extremely dangerous. Rip currents are commonly found at big sandy beaches like Hanalei Bay. They also form next to piers, jetties or where rivers and streams meet the ocean. Nearly every beach on Kauai has some rip current activity.