How many days in Kauai?

The headline things to do in Kauai

From the Kauai guide — these are the items that anchor a 3-day visit. For the full breakdown, read the Kauai travel guide.

1. Na Pali Coast — North Shore (cliffs) / Port Allen (boat departures)

   27 km of cathedral-green sea cliffs rising 1,200 m straight from the Pacific — Hawaii's most photographed coastline. Three ways to see it: (1) the 17-km Kalalau Trail (permit required for overnight; the Hanakapiai Falls 6-km out-and-back is the popular day-hike option, no permit); (2) catamaran or zodiac tour from Port Allen on the south shore (4–6 hours, $150–$250, snorkel stop included); (3) helicopter tour ($300–$400, doors-off available). Book any of these at least 60 days ahead in summer.

2. Waimea Canyon & Kokeʻe State Park — West Side (Waimea)

   The "Grand Canyon of the Pacific" — 16 km long, 1.6 km wide, 900 m deep, with red, orange, and green-streaked walls cut by the Waimea River. Drive Waimea Canyon Road (Route 550) up to the four named lookouts; the Pu'u o Kila lookout at the top (1,200 m elevation) gives a top-down view of the inaccessible Kalalau Valley on the Na Pali Coast. Combine with Kokeʻe State Park for short hikes (Pihea Trail, Awaawapuhi Trail) and morning weather (clouds typically roll in by 11:00).

3. Hanalei Bay — North Shore

   A 3-km crescent of golden sand backed by waterfall-streaked emerald mountains — the iconic Hawaiian beach image. Hanalei Pier on the eastern end is the swimming-and-stand-up-paddle spot in summer; in winter, the bay becomes a serious surf break (visiting surfers should respect the lineup). Hanalei town just inland has the Tahiti Nui tiki bar (a Descendants filming location), Hanalei Bread Co for breakfast, and a single road that floods in heavy rain.

4. Princeville & Hanalei Lookout — North Shore (Princeville)

   The clifftop resort community on the north shore — Princeville Resort's infinity pool overlooks Hanalei Bay; the Hanalei Valley Lookout (just past Princeville on Route 56) frames the taro fields and waterfalls of the Hanalei National Wildlife Refuge below. The St. Regis (now 1 Hotel Hanalei Bay) and the Westin Princeville are the two big resorts; Anini Beach below offers calmer reef-protected swimming than Hanalei Bay.

5. Wailua Falls & Wailua River — East Side (Wailua/Kapaa)

   The 26-m twin Wailua Falls (a Fantasy Island TV-show opening shot) is a roadside lookout on Route 583. From Wailua Marina you can kayak the Wailua River 3 km up to the Secret Falls (Uluwehi Falls) trailhead — a half-day adventure including a 1-km muddy hike to a 30-m waterfall pool. Smith's Tropical Paradise and the Fern Grotto riverboat tour both depart from Wailua Marina.

6. Poipu Beach — South Shore (Poipu)

   The south shore's sunniest beach — protected by a natural sandbar that creates a calm shallow pool ideal for kids and beginner snorkellers, with a more open-water section for stronger swimmers. Hawaiian monk seals (an endangered species, ~1,400 left on Earth) regularly haul out to nap on the sand; volunteers rope off a 50-m radius. Poipu also has the most reliable weather on the island — when it's raining everywhere else, Poipu is usually sunny.

7. Spouting Horn — South Shore (Poipu)

   A south-shore lava tube where incoming waves force seawater 15 m vertically through a hole in the lava shelf with a low groaning sound — Hawaiian legend says it's a giant moʻo lizard trapped in the rocks. Best viewing 1–2 hours after high tide with surf running. The adjacent overlook has stalls selling Niihau-shell jewellery (the genuine version is rare and expensive).

8. Tunnels Beach (Makua) & Ke'e Beach — North Shore (end of Route 560)

   The two best snorkel beaches on the north shore — Tunnels has an extensive reef system 50 m offshore with green sea turtles, parrotfish, and butterflyfish; Ke'e Beach at the road's end is the calmer reef-protected lagoon and the Kalalau Trail trailhead. Both require the Haena State Park reservation system ($10/vehicle + $5/person, book 30 days ahead at gohaena.com) — strictly enforced; no walk-ins.

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