Hours: Port Isabel Lighthouse Sun.-Thurs. 9-6, Fri. 9-5, Sat. 9-7, June 1-Labor Day; daily 9-5, rest of year. Last admission to lighthouse 30 minutes before closing. Keeper’s cottage Mon.-Fri. 9-5, Sat. 10-4. Port Isabel Historical Museum and Treasures of the Gulf Museum Tues.-Sat. 10-4; closed major holidays. Allow 1 hour minimum.