"NCIS: Hawai'i" is primarily filmed on-location in Hawaii, specifically on the island of Oahu and around the city of Honolulu. Other popular TV series like "Hawaii Five-O" and "Magnum P.I." have also filmed in this area. Fans of the show can visit various locations seen in "NCIS: Hawai'i," including Waikiki Beach and Joint Base Pearl Harbor-Hickam. Honolulu, being a popular tourist destination, makes it convenient for fans to plan a vacation and explore the city where the show is set.