Shark sightings are surging across New York beaches, including two massive great whites. Shark Sightings Surge Across New YorkIn recent days, shark sightings have surged dramatically across New York. Dan Kitwood, Getty Images Dan Kitwood, Getty ImagesThere have been at least 23 shark sightings at Rockaway Beach this summer, with 16 happening within five days. Massive Sharks Spotted In New YorkShark sightings include two massive great white sharks. Dan Kitwood, Getty Images Dan Kitwood, Getty ImagesWhen a shark is detected, beaches in New York are red-flagged for one to two hours.