Seem to be increasing on both coasts (and probably in the Gulf as well), according to Fox News.
“Please stay close to the shore. Being far from the shore makes it harder for lifeguards or police or anyone who is going to help you get to you,” [New York beach authority] Curran said. “Swim in groups. If you are swimming alone, a shark may think you’re their natural prey.”
Sharks are big and scary. I had an encounter years ago while scuba diving in deep water off Palm Beach. A Tiger Shark, a good ten feet long, circled the anchor line I was holding onto about six feet below me. I would have gotten out immediately but I was decompressing after a sojourn at 100 feet so I had to wait a few minutes while the circling went on. Was never so happy to be out of the water when time was up.