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Island Beach State Park. Ocean County, New Jersey. The main gate of Island Beach State Park typically opens at 8 A.M. and closes at 8 P.M.. During summer weekends and holidays, from Memorial Day-weekend to Labor Day-weekend, the park opens at 7 A.M. Island Beach can get very crowded during the summer weekends and holidays.
Hours of Operation. 1  Open 5/18 until 9/25. 2  The Lighthouse & Keeper's Quarters are open to the public from 5/18 - 9/25. 3  NYS Parks has partnered with Clayton Island Tours to offer a special Rock Island Tour with a one hour stopover at the Island. 4  Inquire about weddings and special events by calling (315) 775-6886.