With its canyons, breathtaking cliffs beaten by the ocean and luxuriant vegetation, Kauai truly deserves its nickname, the Garden Island. For many people, Kauai is one of the most beautiful islands in the world. Snorkeling in Kauai is not considered the best in the Hawaiian archipelago, but the island offers a dozen good snorkeling spots. The shallow fringing reefs of the north shore, in particular, gives the opportunity to encounter the local sea life - including, for the luckiest snorkelers, the Hawaiian monk seal.
Kauai, boasting the dramatic landscapes of the Napali Coast, is one of the most beautiful islands in the world. Underwater, snorkeling is adequate, but not as spectacular as in Maui and or the Big Island.
Kauai is Hawaii’s oldest island and the extensive reefs have had time to develop there. They allow the practice of snorkeling in relatively safe conditions, although you still need to be aware of the cut currents in the small “lagoons”.
About 15 snorkeling spots can be explored around Kauai, most of which are located in two regions: the North Shore, around Hanalei, and the coastline which stretches west of Poipu, on the south coast of the island.
Elsewhere, the opportunities of getting into the water to snorkel can be counted on the fingers of one hand. The Hanalei region is the most famous area for snorkeling in Kauai. This is where some of the most beautiful spots on the island are located. In winter, however, this part of the coast is exposed to swells and huge waves that make most of the locations dangerous to snorkel.
A few minutes drive east of Hanalei, you will find several snorkeling spots that follow one another along the shore. Puu Poa Beach, Hideaway Beach, Anini Beach, and neighboring Kahilikai Beach and Kahiliwai Beach are good options when the ocean conditions allow.
For the best spots on the North Shore, take the road that runs along the coast heading west from Hanalei. You will reach Kepuhi Point, which is quite exposed and should be snorkeled only when the ocean is perfectly calm.
Tunnels Beach (aka Makua Beach) is undoubtedly the best spot in Kauai to encounter monk seals. Finally, Ke’e Beach, at the very end of the road, is the gateway to the Napali Coast.
On the other side of the island, several good snorkeling spots are found within 3 miles of the coastline around Koloa. In this area, we particularly recommend the twin beaches of Poipu Beach Park (especially for beginners), Koloa Landing where you get into the water from an old boat ramp and Lawai Beach.
A 30-minute drive further west is Salt Pond Beach Park, where you can explore a lagoon protected by a reef.
The Napali Coast, the northwest coast of Kauai, is totally wild and can’t be accessed by road. If you choose to visit this area, Kauai has a large choice of boat tours to the Napali Coast. Tours will allow you to discover one of the most beautiful landscapes of the Hawaiian archipelago. With a tour, you will also be able to snorkel on the coral reefs that have grown along this remote part of the coast.
Some of the most popular spots for boat tours on the Napali Coast include Nualolo Kai Beach and the reef just out of Kauhao Valley. Several Kauai tour operators also offer boat trips to the neighboring island of Niihau. Most of these tours include snorkeling stops, especially at Lehua Crater.
450 species of fish and 70 species of corals inhabit Kauai’s reefs, nearly a quarter of which are endemic to the archipelago. Green sea turtles are less common on Kauai than on Oahu, Big Island, or Maui, but they are seen quite easily on the North Shore.
On the other hand, it is in Kauai that you are most likely to encounter Hawaiian monk seals on the beach or at sea. This endemic and endangered species, most of whom inhabit the isolated northwestern islands, regularly frequent the Kauai and Niihau coasts. The best chances to see them are at Tunnels Beach, Poipu Beach, Ke’e Beach and Lehua Crater.
Snorkeling in Hawaii soon? Take with you a Fish ID Book, an essential tool to help you identify the fish you see underwater. Hawaii’s Fishes : A Guide for Snorkelers and Divers (including fish species found only in Hawaii) and Reef Fish Identification Tropical Pacific (including marine fishes ranging from Thailand to Tahiti, and includes Hawaii) are the two essential reference guides every snorkeler should have.
As elsewhere in the archipelago, there are two main seasons in Kauai. The summer, from May to October, is the warmest, driest and sunniest season (with an average of 80°F/26.5°C, and maximum temperatures of 85°F/29.5°C). This is the hurricane season, but they are rare in the North Pacific.
In winter, from November to April, the weather is wetter and more changeable with intermittent tropical rains and sunny spells. The air is cooler (an average of 75°F/24°C, with maximum temperatures of 78°F/25.5°C).
The water temperature can fall to 73°F/23°C in winter, which is still a good temperature for snorkeling, and reach a peak of 82-84°F/28-29°C in the heart of the summer (June to September).
Lastly, you should remember that winter is the surfing season in Hawaii, and it is sometimes hard for snorkelers to access the northern coast of Kauai (North Shore) during this period.
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Common on all reef spots
Found in all Okinawa reef areas; abundant at Furuzamami Beach
Frequently sighted at Ama Beach at high tide; occasionally seen at Furuzamami Beach
Found in all Okinawa reef areas; common at Furuzamami and Aharen
Frequently sighted chasing on Furuzamami Beach reef
Occasionally sighted at sea at Tunnels Beach, rare in Ke’e Beach
On all spots, even a few meters from the shore
On all spots
On all spots, common on Ke’e Beach reef flat
On all spots, common on Tunnels Beach drop off
Shallow crescent-shaped bays with colorful fish and sea turtles
Level: Free shore access Resort nearby
Shallow lagoon and reef drop off visited by monk seals
Level: Free shore access
Shallow lagoon with many reef fish
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