Courtesy: Town of Plymouth Plymouth, MA Shark Activity Prompts Beach Closures in Plymouth Plymouth, MA – Two popular beaches in Plymouth have been temporarily closed to swimmers after officials confirmed a shark-seal predation near Manomet Point on Saturday. Authorities announced that both White Horse Beach and Long Beach are under a Red Flag warning, meaning all swimming is prohibited until further notice. The decision comes after evidence of shark activity was confirmed off the coastline, reinforcing ongoing safety protocols designed to protect beachgoers. “Due to the confirmed n