Molokini Crater

State: Hawaii. Type: crescent-shaped, partially submerged volcanic crater and islet off the coast of Maui, Maui County. Located in the Alalakeiki Channel between Maui and Kahoolawe, about 2.5 miles west of Makena State Park. Erupted roughly 230,000 years ago; the islet covers about 23 acres, is about 0.4 miles in diameter, and rises to about 161 feet above the water. Designated a Marine Life Conservation District in 1977 (crater plus about 77 acres of surrounding underwater terrain) and a Hawaii State Seabird Sanctuary. Reachable only by permitted boat tour.

Molokini is a small, crescent-shaped volcanic crater rising from the sea between the islands of Maui and Kahoolawe, and it is one of Hawaii's most famous snorkeling and diving destinations. Formed roughly 230,000 years ago, the islet is the exposed rim of a volcanic crater; its curving arm shelters a shallow, coral-rich cove whose calm, exceptionally clear water, with visibility often exceeding 150 feet, has made it a signature Maui ocean experience. The crater supports a rich marine ecosystem, with roughly 250 species of fish, many of them found only in Hawaii, along with dozens of varieties of hard coral, while the crater's outer wall drops off dramatically into deeper water that draws experienced scuba divers. Because Molokini is both a Marine Life Conservation District and a state seabird sanctuary, it is a protected place: visitors cannot land freely, and access is limited to boat tours run by operators permitted to work there. Most visitors experience Molokini on a morning half-day snorkel cruise departing from Maui's south or west shores, often combined with a second snorkel stop. In winter, boats bound for the crater frequently encounter humpback whales along the way.

Molokini lies in the Alalakeiki Channel between Maui and the island of Kahoolawe, in Maui County. It sits about 2.5 miles west of Makena State Park on Maui's south shore. The uninhabited islet is the rim of a submerged crater; boat tours typically depart from harbors on Maui's south and west coasts, such as Maalaea and the Kihei-Wailea area, for the short crossing to the crater.

The waters around Molokini enjoy Maui's warm, sunny south-shore climate, with generally calm morning conditions that are ideal for snorkeling before afternoon trade winds pick up. Sea conditions inside the sheltered crescent are usually protected from high surf, which is why visibility there is so consistently good. Winter (roughly January through March) brings cooler air and the arrival of humpback whales in surrounding waters, while the drier, warmer months are prized for calm seas.

Morning is the classic time to visit, since seas are typically calmest and clearest before the wind builds later in the day, and most tours are scheduled accordingly. The warmer, drier months are favored for the calmest water and best snorkeling conditions, while the winter whale season adds the bonus of humpback sightings on the boat ride to and from the crater. Booking an early-departure tour generally offers the best combination of calm water and visibility.

Molokini is the rim of a volcanic crater that erupted roughly 230,000 years ago, part of the volcanic activity that built the prehistoric landmass known as Maui Nui. During World War II, the U.S. Navy reportedly used the crater for target practice, in part because its silhouette resembled a ship, causing damage to the reef; unexploded ordnance was later removed from the area by divers. Recognizing its ecological value, the state designated Molokini islet, the crater, and about 77 acres of surrounding underwater terrain a Marine Life Conservation District in 1977, and the islet also serves as a Hawaii State Seabird Sanctuary. These protections restrict what visitors can do there and channel access through permitted tour operators.

The main activities are snorkeling and scuba diving inside and around the crater. Inside the sheltered crescent, snorkelers float above coral and schools of tropical fish in calm, clear water, while certified scuba divers can explore deeper, including along the dramatic outer back wall that plunges into deep water. Most visitors come on guided boat tours that provide gear, and many trips combine Molokini with a second snorkel stop, such as a turtle or reef site along the Maui coast. In winter, the boat rides double as whale-watching opportunities. Because it is a protected area, activities are limited to those the tour operators are permitted to offer.

The destination itself is the crater and its waters: the sheltered inner cove for snorkeling, the coral reef and its roughly 250 fish species, and, for experienced divers, the deep outer back wall. The islet's rocks serve as a seabird sanctuary and are off-limits for landing. Molokini is generally experienced from the water on a boat tour rather than as a place you walk around.

Molokini is accessible only by boat, and only via operators permitted to run tours there. Visitors reach it on snorkel or dive cruises departing from Maui harbors, commonly Maalaea Harbor and points along the Kihei-Wailea-Makena south shore, for the short crossing across the channel. There is no way to reach the crater independently by swimming or from land; a boat tour is the sole practical means of access.

There are no fixed 'opening hours' for the crater itself; access is governed by the schedules of the permitted boat tours, most of which run morning departures to catch the calmest water. Confirm departure times directly with your chosen operator.

There is no separate admission ticket for the crater; instead, visitors pay for a boat tour, which is priced individually by each operator and typically includes snorkel gear and often food. Because prices vary widely by operator, boat type, and season, confirm current pricing directly with the tour company. As a protected conservation area, specific access rules are set by the state.

A typical Molokini snorkel trip is a half-day outing of roughly a few hours, including the boat ride out, time in the water (often with a second snorkel stop), and the return. Plan a morning for the excursion.

There is no lodging at Molokini itself, as it is an uninhabited protected islet. Visitors stay on Maui, most conveniently in the south-shore areas near the departure harbors, such as Kihei and Wailea, or in the Maalaea area, all of which offer a range of hotels, resorts, and condominiums. West Maui's Kaanapali and Kapalua areas are also within reach for those joining tours that depart from farther afield.

Dining is found on Maui rather than at the crater; many boat tours include a meal or snacks on board. The south-shore towns of Kihei and Wailea near the main departure harbors offer a wide range of restaurants, from casual local spots to resort dining, and the Maalaea Harbor area has food options as well.

Molokini is often paired with a second snorkel stop along the Maui coast on the same tour, such as a turtle-viewing reef. On land, the south-shore attractions near the departure points, including Makena State Park (about 2.5 miles away) and the Wailea beaches, are natural additions to a trip. The nearby island of Kahoolawe is visible across the channel but is itself a restricted, uninhabited reserve.

Maui's Kahului Airport (OGG) is the island's main gateway, from which a rental car is the usual way to reach the south-shore or Maalaea departure harbors. Once at the harbor, the tour boat is the only transport to the crater. Public transit to the harbors is limited, so most visitors drive or use a rideshare.

Snorkeling and diving carry standard ocean risks; go with a reputable, permitted operator, follow the crew's safety briefing, and be honest about your swimming ability, as flotation aids are typically available. Conditions are usually calmest in the morning, and seas can build later in the day. Respect the marine conservation rules: do not touch or stand on coral, do not feed fish, and do not attempt to land on the islet, which is a protected seabird sanctuary. Use reef-safe sunscreen. For any emergency on the water, the crew coordinates with the U.S. Coast Guard; on land, dial 911.

Bring reef-safe sunscreen, a hat, sunglasses, a towel, and a light layer for wind on the boat, plus any personal snorkel gear you prefer (tours generally provide gear). A waterproof camera is popular for the clear water, and motion-sickness remedies help sensitive travelers on the crossing. Water and, on many tours, food are provided on board, but confirm with your operator.

Book an early-morning tour for the calmest, clearest water, and reserve in advance during the busy winter whale season. Choose a permitted operator and consider a tour that adds a second snorkel stop for more variety. If you are prone to seasickness, take precautions before departure. Follow all conservation rules to help protect the reef and seabirds, and use only reef-safe sunscreen.

For any emergency on land, dial 911, the nationwide U.S. emergency number; on the water, tour crews coordinate with the U.S. Coast Guard. Molokini is managed under the Hawaii Department of Land and Natural Resources' Division of Aquatic/Forestry and Wildlife programs, which oversee its conservation-district and seabird-sanctuary status.

Hawaii DLNR - Molokini Shoal Marine Life Conservation District - https://dlnr.hawaii.gov/dar/

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.

This section is being updated and will be available shortly.