How to spend 4 days in Kauai?

Four days in Kauai works well if you prioritize. Day one: helicopter tour with Jack Harter ($169–399) for an aerial overview of the island — Na Pali, Waimea Canyon, and the Wailua falls in one flight. Day two: boat tour along the Na Pali Coast with Captain Andy's ($229–295), including snorkeling stops and a sea cave swim. Day three: drive the north shore — Hanalei Bay, Ke'e Beach, and the trailhead of the Kalalau Trail for views without the full hike. Day four: Waimea Canyon and Kokee State Park on the south side, finishing at Poipu Beach for snorkeling and sunset. Base yourself in Poipu for central access or Princeville for North Shore proximity. Book helicopter and Na Pali tours for days one and two immediately upon arrival.