Top 10 Dive Sites in The Marshall Islands
The Marshall Islands carry more history per square kilometre of ocean than almost any place on Earth. This Micronesian nation, scattered across 29 atolls and five islands in the central Pacific, was the site of some of the most ferocious naval combat of WWII and subsequently the location of the first United States atomic bomb tests at Bikini Atoll in 1946. The underwater consequence of all this history is extraordinary: dozens of warships from the world's greatest naval powers — American, Japanese, German — lying on the seabed in water so clear that the view from the surface to the seafloor, 30 metres below, can reveal every deck detail. Beyond the wrecks, the Marshalls have pristine atoll reef systems with shark populations, manta rays, and coral walls in a condition that more heavily visited Pacific nations can barely remember. Visibility averages 30–40 metres on the outer atolls. Water temperature is a consistent 28–29°C year-round. There is no bad season. Open the map to explore dive sites across the Marshall Islands.
1. USS Saratoga, Bikini Atoll
The USS Saratoga is one of the three greatest wreck dives in the world. An aircraft carrier of 880 feet, she was sunk by the Baker atomic test explosion on 25 July 1946 and lies on her starboard side at 50–55 metres, the flight deck resting at 17–40 metres depending on position along the hull. The scale is almost incomprehensible underwater: the island (superstructure) stands 25 metres above the flight deck, aircraft are still spotted on the hangar deck and in the water around the hull. The size means a single dive covers only a portion of the wreck. Encrustation is dense after 80 years — the structure is covered in soft corals, sponges, and anemones, and large amberjack school over the flight deck in masses. Technical diving certification required for the deepest sections; Advanced Open Water reaches the flight deck. Access only by Bikini Atoll liveaboard.
2. HIJMS Nagato, Bikini Atoll
The Nagato, Japan's flagship battleship from which Admiral Yamamoto issued the order to attack Pearl Harbor, sank four days after the Baker test in the early hours of 29 July 1946. She lies inverted in 50–55 metres, her massive gun turrets — 410mm — hanging upside down from the wreck's underside. The sheer historical weight of this dive is difficult to convey: you are descending to the ship that launched the Pacific War. The hull is encrusted with 80 years of coral and sponge. Large fish — Napoleon wrasse, giant grouper — inhabit the superstructure. Visibility at Bikini is typically above 30 metres. Advanced Open Water reaches the shallowest accessible sections at around 40 metres; technical training required for full wreck exploration. Bikini Atoll liveaboard access.
3. Prinz Eugen, Kwajalein Atoll
The Prinz Eugen was the German heavy cruiser that accompanied the Bismarck on its fateful Atlantic sortie in 1941, survived the entire war (unlike almost every other major German warship), and was captured and brought to the Pacific as a target for the Operation Crossroads atomic tests in 1946. It survived two blasts at Bikini, was towed to Kwajalein, and capsized in the lagoon in December 1946, where it lies on its side, the bow section and one of its enormous propellers visible in the shallows — the 4.5-metre brass propeller emerging from just below the surface is one of the most photographed wreck images in the Pacific. The wreck descends from the surface to 40 metres. Advanced Open Water. Accessible from Kwajalein via local operators.
4. Kwajalein Atoll Wrecks
Kwajalein Lagoon, the world's largest atoll lagoon, contains one of the most concentrated wreck collections in the Pacific. The February 1944 US assault on Kwajalein (Operation Flintlock) sank numerous Japanese vessels in the lagoon; these plus the later Operation Crossroads support ships give the lagoon a wreck count exceeding 100 individual vessels. Most are at 25–40 metres in exceptional visibility. The HIJMS Akibasan Maru, a Japanese coastal freighter, sits upright at 28 metres with its holds open and penetrable. Large barracuda circle the superstructures. Napoleon wrasse patrol the open lagoon. Access to Kwajalein requires coordination with the US military installation; dedicated dive operators handle the logistics. Advanced Open Water recommended. Visibility routinely above 30 metres.
5. Majuro Atoll, Outer Reef Walls
Majuro, the capital atoll, offers the most accessible diving in the Marshall Islands for visitors who arrive on commercial flights. The outer reef walls of Majuro drop from the surface into deep water, with the upper 30 metres covered in pristine hard coral gardens undisturbed by bleaching events that have struck more equatorial reefs. Grey reef sharks and whitetip reef sharks are permanent residents; occasional hammerheads appear on the outer wall edge in the early morning. The inside of the atoll lagoon provides calm diving at 10–20 metres over sandy bottom with garden eels, sea cucumbers, and resting nurse sharks. Majuro-based operators offer day trips to both the inner lagoon and the outer wall. Open Water for lagoon diving; Advanced for the wall. Visibility 25–35 metres on clear days.
6. Bikini Atoll: USS Anderson
The USS Anderson is a Fletcher-class destroyer sunk at Bikini alongside the larger vessels and provides a different experience from the capital ships. At about 55 metres she is a technical dive, but her superstructure rises to around 40 metres and her gun mounts are clearly visible. The destroyer's smaller scale makes it possible to comprehend the entire vessel in a single dive rather than seeing merely a fraction of a carrier or battleship. Fish life on the Anderson is dense: large schools of glassy sweepers fill the enclosed spaces, and reef sharks circle the entire structure. Bikini Atoll liveaboard access. Advanced technical dive; 40m Advanced Open Water or equivalent. Visibility always above 25 metres at Bikini.
7. Enewetak Atoll, Northern Marshalls
Enewetak was the site of 67 nuclear tests between 1948 and 1958, including the 1952 Ivy Mike test — the first hydrogen bomb detonation. The atoll was cleared for civilian return in 1980 and subsequently for diving, though it sees very few visiting divers due to its remote position in the northern Marshalls. The outer reef walls are in extraordinary condition for exactly the same reason — minimal diving pressure. Grey reef sharks here are among the most numerous and least disturbed in the Pacific. The lagoon contains additional WWII wrecks from the 1944 Operation Catchpole assault. Access requires a charter vessel or a liveaboard that extends its itinerary north from Bikini. Advanced Open Water. Best April through October when northerly swells diminish.
8. Arno Atoll, Near Majuro
Arno Atoll, east of Majuro, is reachable by day trip and provides reef diving that complements the wreck focus of Bikini and Kwajalein. The outer reef of Arno has a wall dive on its eastern face that drops from 3 metres to beyond 40, covered in large plate corals and sea fans at depth. Schools of barracuda and big-eye trevally are reliable on the upper reef in the morning. The inner lagoon at Arno has been proposed as one of the best examples of pristine atoll lagoon ecology in the Pacific, with coral coverage well above typical atoll averages. Green turtles nest on the uninhabited motus (islets) and graze on the inner lagoon reef. Open Water level for most sites; Advanced for the deeper wall sections. Visibility 20–30 metres.
9. Laura Reef, Majuro Atoll
Laura is the western end of Majuro's main island chain, where the atoll meets the open Pacific. The reef here is more exposed to swell than the inner lagoon sites and is correspondingly richer in current-adapted species: large aggregations of pyramid butterflyfish, schools of surgeonfish, and substantial populations of blacktip reef sharks that patrol the shallow crest at 5–8 metres. The reef drops in a series of steps to 25 metres over a gradient covered in healthy hard coral with excellent coverage of branching Acropora and massive brain corals. This is one of Majuro's best shark-observation sites, accessible on a day trip. Open Water sufficient for the shallow crest; Advanced for the deeper steps. Best morning dives before thermal mixing reduces clarity.
10. Jaluit Atoll, Southern Marshalls
Jaluit was the administrative capital of the German Marshall Islands protectorate (1885–1914) and contains wrecks dating from both the German colonial period and WWII. The atoll is reached from Majuro by domestic flight and sees a handful of visiting divers per year. The WWII-era wreck of a Japanese patrol vessel in the lagoon at 18 metres is accessible to sport divers and in good condition. The outer reef walls are pristine — no bleaching damage that researchers have recorded. Lemon sharks are present in the pass between the atoll's southern motus. The combination of historical depth and minimal diver impact makes Jaluit compelling for serious divers who have already done Bikini and Kwajalein. Open Water level for most sites. Local operators based at Jaluit have basic equipment; bring your own computer and regulators.
Planning Your Marshall Islands Dive Trip
United Airlines' Island Hopper route from Honolulu touches Kwajalein and Majuro, and the same route connects Guam. Bikini Atoll has no commercial air service; it is reached exclusively by liveaboard from Majuro, with a crossing of roughly 1,000 kilometres through open ocean — a two-day sail. The Bikini Atoll liveaboard season runs March through November. Majuro-based diving does not require a liveaboard and can be booked through local operators including Kalalin Sports, which has run Marshall Islands diving for decades. Equipment rental is available in Majuro but limited; bring your own regulator, computer, and BCD if possible. Bikini is a UNESCO World Heritage Site and requires a Republic of the Marshall Islands dive permit, arranged by the liveaboard operator. The Marshall Islands remains one of the most expensive and logistically demanding dive destinations in the world, but for serious wreck divers, the USS Saratoga alone justifies the journey. Open the map to see wreck locations and planning information across the Marshall Islands.