Best Places to Scuba Dive on the Big Island

Best Places to Scuba Dive on the Big Island

Picture of Gil Zeimer

Gil Zeimer

Gil took a resort course on Grand Cayman in 1981 and has been hooked on diving ever since. He received his PADI certification in 1985 in a reservoir south of Dallas. He’s explored three oceans — from Australia to Micronesia, four Hawaiian Islands, Mexico’s Sea of Cortez, California’s Monterey and Channel Islands, Florida’s Keys, Walt Disney World’s Living Seas Exhibit, three Bahamas Islands, the Turks and Caicos Islands, Little Cayman Island, and Aruba.

The Island of Hawaii, in island terms, is bigger than big; its absolutely huge. As the largest and southeasternmost of the chain, its the largest in the United States, comprises 63 percent of the states land, but is only home to 13 percent of its people. With more than 4,000 square miles — thats 80 times larger than San Francisco — it boasts more than 313 miles of shoreline for its 100 beaches featuring black, green, and white sand. It also has two main cities (Kailua-Kona and Hilo, each with its own international airport), two active volcanoes (Kilauea and Mauna Loa in the southeast), and some of the worlds best coffee. 

The Kohala Coast on the northwest side and the Kailua-Kona south of it are both equally popular for water sports because they offer dry and typically sunny weather, though you may often get drenched by a quick-moving afternoon storm. There are more than 100 dive sites around the Big Island with an amazing variety of sea life. Visibility averages around 60 to 100 feet.

Here are the best places to scuba dive in the Big Island of Hawaii.

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Featured Photo: Sarah Humer

What You Can See

Hawaiian Green Sea Turtles are more plentiful on the other islands, but can be seen on dives along the Hilo coast — please remember not to touch them or hassle them in any way. Around this island, you can see schools of large manta rays, inch-long nudibranchs, spinner dolphins and volcanic lava tubes. Octopi, eagle rays, moray eels, swarms of colorful fish including the Humuhumu” state fish, and a wide variety of sharks are also common sightings. About 20 percent of the fish youll see are endemic to Hawaii. Humpback Whales can often be seen on dive trips near Hilos break wall during their migration season from late fall to early spring.

Water Temperatures

The average water temperature around the Island of Hawaii is similar to the other islands — ranging between 76 degrees to 82 degrees Fahrenheit year-round — and warmest between May to December. Whether swimming, snorkeling, or rolling off a boat to dive, the water always feels cool because its 10 to 20 degrees below your body temperature. Wearing a shorty 3-5mm wetsuit, hoodie, and gloves will help prevent heat loss while underwater, with an extra layer of a thin dive skin beneath.

Close-up image of a zebra moray eel emerging from a crevice in a coral reef, one of the best places to scuba dive on the Big Island. The eel has a distinctive white and dark brown striped pattern, and its mouth is open, revealing sharp teeth and orange lips. The background displays various shades of green algae and coral textures.
Photo: Abbs Johnson

3-Room Cave, Kona Coast

South of Kona off Captain Cook beach, this dive available during calm seas is literally what its name implies: a 200-foot wide lava tube with three big rooms. Dive operators provide a rope line in and out and cyalume light sticks so every diver can be identified, but bring a flashlight, too. You may see lobsters, shrimp, puffer fish, nudibranchs, moray eels, and more among the lava and corals.

An underwater image of a barracuda swimming close to the seafloor, which is covered with rocks and coral. Sunlight creates patterns on the barracuda's silver body and the seafloor. In some of the best places to scuba dive on Big Island, the water is clear, allowing a good view of the fish and its surroundings.
Photo: Brocken Inaglory

Black Coral Forest, South Coast

Black coral is a living memory of these volcanic islands — and the Island of Hawaii is still active. Your boat will anchor over a sand chute and 90 feet down, youll see the first of a forest of black coral trees, as well as scary-looking but harmless barracuda, viper eels, and all types of reef fish.

Close-up of a red and white nudibranch, a type of sea slug, on a pink coral. The nudibranch has spiky appendages on its back and long antennae. Captured in one of the best places to scuba dive on the Big Island, the image highlights the vibrant colors and intricate details of this marine wonder.
Photo: Dr. James P. McVey/NOAA

Blackwater Dive, Kona Coast

For something different, you may want to do this boat dive in pitch dark water thats 3,000-feet deep along the continental shelf into the abyss. Ive not done this but divers rave about a serene experience to see a variety of animals at night as you float about 50 feet below your boat on a tether. You must have logged at least 25 dives to quality and had several night dives under your weight belt. You may see all kinds of bigger fish and pelagics, bioluminescent fish, colorful coral, and more.

A rocky cliffside with distinct geological formations stands against a bright blue sky. A wooden ladder is attached to the cliff, leading to an enclosed area. Below, a dark rubber raft is tethered to the rocks, floating on the calm, deep blue water—one of the best places to scuba dive on the Big Island.
Photo: Eli Duke

Kona Aggressor II Liveaboard Boat

This well-known vessel out of the Kailua-Kona area can accommodate up to 14 passengers. It offers the opportunity to take up to 5 dives per day at a wide variety of sites and up to 27 dives on a 7-day charter versus a typical 1-day, 2- or 3-tank charter boat. Thats a ton of bottom time and the best bang for your underwater buck. Most of their sites are among the 22 it offers along the western coast of the Island of Hawaii, as far away as South Point in the southeast.

A scuba diver in a black diving suit with a pink oxygen tank swims underwater alongside a large manta ray. The seafloor below them, typical of the best places to scuba dive on the Big Island, is covered in coral and rocks, set against the deep blue ocean backdrop.
Photo: Jacopo Werther

“Manta Heaven” Boat Dive, Kona Coast

Another option is a sunset boat dive or daytime dive out of Kona. After motoring north eight miles to Manta Heaven,” your operator enables you to spend time with even more large rays (Big Bertha” has a wingspan of 16 feet) who weigh about 1,000 lbs. each. The average number of rays seen here is about 10. The rayspresence is not guaranteed, but if you dont see some, the operators will give you a free rain check.

A large manta ray glides through the clear blue water above a coral reef, surrounded by an array of colorful fish. This captivating scene captures one of the best places to scuba dive on the Big Island, with small fish in shades of black, yellow, and orange dancing around the ray and reef.
Photo: Richard Zerpe

“Manta Village” Night Dive, Kona Coast

Manta Village” is seven miles south of Kona, off the coast of the Sheraton Keauhou Bay Resort & Spa. Its the original and most popular place to see these harmless, but fascinating mantas — akadevil fish.” Shore lights attracting marine plankton after sunset attract rays who are comfortable swimming around snorkelers and divers at 20- to 30-foot depths. The average number of rays seen per day is about four.

A graceful spotted eagle ray glides over a rocky, coral-filled ocean floor, surrounded by various marine plants and smaller fish. The ray's distinctive white spots are clearly visible against its dark body as it swims in the clear blue water—an enchanting sight at one of the best places to scuba dive on the Big Island.
Photo: Yvan Le Borgne

Sea Turtle Cove, Hilo

Off the islands east coast, the open water is more prone to stronger winds and currents. Departing from Wailoa Boat Harbor, dive boats journey out to sheltered coves where you can see schools of large Hawaii Green Sea Turtles, as well as manta and eagle rays, moray eels, octopi, tropical reef fish, and colorful corals.

Underwater image of a large shark swimming in clear blue water, one of the best places to scuba dive on the Big Island. The shark, grey with a white underbelly, is accompanied by smaller black-and-white striped fish. Light from the surface filters through the water, highlighting the shark’s sleek body.
Photo: Alexander Vasenin

Shark Dive, Kona Coast

If diving in the dark doesnt raise your eyebrows, how about an adventure three miles off the coast to witness one of the worlds best places to encounter many large shark species? This operator has been offering these dive trips to watch hammerheads, tiger, oceanic white tip, Galapagos, sandbar, mako, reef and black tip, even great white sharks — which are rarely spotted — 250 days a year, over 15 years. That means theres a high probability that both experienced and novice divers can have a once-in-a-lifetime dive or two, as well as seeing humpbacks, pilot, sperm whales, dolphins, tuna, ocean sunfish, and more. The operator claims that if you dont see some, youll get your $250 back. Seeing them up-close underwater is an adrenaline rush that youll remember for years, but if you dont want to get wet, you can also just watch from the boat.

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