Can you snorkel from the shore in Oahu?

Yes, Oahu has excellent shore snorkeling at several spots without needing a tour. Hanauma Bay is the most popular — a protected reserve with a reef 100 yards from shore, though you need a reservation ($25 entry). Sharks Cove on the North Shore is free and has lava tubes to explore, best in summer when surf is calm. Lanikai Beach and Kailua Bay on the Windward side offer clear, calm water with good reef fish. Ko Olina's four lagoons on the west side are perfect for shore snorkeling, especially for families. Electric Beach (Kahe Point) near Ko Olina is a local favorite with warm outflow water that attracts sea turtles year-round. Bring a mask, fins, and reef-safe sunscreen.