Sandy Hook Unit daily 5 a.m.-10 p.m., Apr.-Oct.; 5 a.m.-8 p.m., rest of year. Visitor Center at Spermaceti Cove and at Lighthouse Keepers Quarters daily 9-5. Guided lighthouse tours are given daily 1-4:30; children under 48 inches are not permitted. History House Sat.-Sun. 1-5. Rangers are available daily 24 hours.