American Samoa · South Pacific
Pristine coral reefs, dramatic drop-offs, and untouched marine wilderness — American Samoa is the Pacific's best-kept diving secret.
National Marine Sanctuary
Year-Round Diving
Why American Samoa
American Samoa sits in the heart of the South Pacific, protected by the National Marine Sanctuary of American Samoa — the largest and most remote sanctuary in the entire US system, covering 13,581 square miles across six protected units. The National Park of American Samoa is the only US national park south of the equator.
From the ancient coral gardens of Fagatele Bay to the "Valley of the Giants" off Ta'u — home to coral heads over 500 years old — every dive reveals an underwater world largely untouched by mass tourism.
Top Locations
From shallow gardens to deep walls, American Samoa offers incredible variety for divers of all levels.
Originally designated in 1986 as one of America's first National Marine Sanctuaries, Fagatele Bay sits inside an ancient volcanic crater on Tutuila's southwest coast. A strict no-take zone, it supports at least 200 coral species and 271 fish species. Blacktip reef sharks, spotted eagle rays, and hawksbill turtles are regular encounters. Access requires a short hike via Futiga Village, where a small fee is paid to the landowning family — boat diving with a guide is recommended due to tidal currents.
A small volcanic island a 30-minute boat ride from Tutuila's east end, now a dedicated unit of the National Marine Sanctuary. Colorful coral gardens fringe the island's shores. Nafanua Bank nearby is a hotspot for big pelagics — dogtooth tuna, giant trevally, and rainbow runner patrol the reef edge. Blacktip reef sharks are commonly sighted.
Alega Beach near Pago Pago is one of the most accessible reef dives on Tutuila — a protected bay with dense populations of surgeonfish, butterflyfish, and wrasse. Multiple shore dive entry points exist along Tutuila's north coast between Pago Pago and the airport, offering easy reef diving on day one without a charter boat.
Ofu's To'aga Lagoon is one of the Pacific's most celebrated reef systems, hosting 150 coral species and nearly 300 fish species. These corals are the subject of active climate science — they exhibit unusual thermal tolerance and survive temperatures that bleach reefs elsewhere. Only a few hundred visitors come per year; you may share this world-class reef with no one.
Off the western shores of Ta'u Island lies one of diving's most extraordinary natural spectacles. Ancient Porites coral heads — some over 500 years old — rise from the seabed like monuments. "Big Momma," estimated at 21 feet tall and 135 feet in circumference, may be the largest single coral colony on Earth. Giant clams abound along the western reef. Protected within the National Marine Sanctuary.
130 nautical miles east of Pago Pago, Rose Atoll is one of the most untouched marine environments on Earth — a Marine National Monument and Sanctuary unit where 97% of American Samoa's seabirds nest. Its reef glows pink from crustose coralline algae. Species common elsewhere — humphead wrasse, giant clams, large parrotfish — thrive here unmolested. Access is restricted to permitted researchers only; no commercial diving.
What You'll See
Over 950 fish species and 1,400+ invertebrate species documented across the sanctuary system.
Blacktip reef sharks are the most common encounter, especially at Fagatele Bay. Whitetip, grey reef, silky, and silvertip sharks also frequent the sanctuary waters.
Green and hawksbill turtles are resident year-round throughout the sanctuary. Rose Atoll is the primary green turtle nesting site in American Samoa.
Spinner and bottlenose dolphins frequent the bays. Humpback whales (Oceania population, endangered) visit July–October, peaking September–October. Whales can be heard underwater during peak season.
Over 250 species of stony coral, including massive Porites colonies hundreds of years old. Some of the Pacific's highest coral cover.
950+ fish species documented, including dogtooth tuna, giant trevally, humphead wrasse, rainbow runner, barracuda, grouper, snapper, and spectacular lionfish.
Nudibranchs, ghost pipefish, frogfish, and mantis shrimp reward the observant diver on every dive.
Over 1,400 invertebrate species. Giant clams (Tridacna maxima) are especially abundant at Ta'u and Rose Atoll. Anemones with clownfish, sea fans, and colourful sea stars throughout.
Day octopus are frequently spotted. Giant moray and snowflake eels peer from crevices throughout the reef.
Travel Guide
Pago Pago International Airport (PPG) is served by Hawaiian Airlines from Honolulu (HNL) — typically 2–3 flights per week on an Airbus A330, about 5.5 hours. Regional connections via Samoa Airways from Apia. Domestic flights to Ofu and Ta'u are operated by Samoa Airways (~1h 15m, ~$155 each way).
Diving is possible year-round. The dry season (May–October) offers calmer seas and better visibility. The wet season brings warmer water and lush marine activity.
Water temperature is 27–30°C year-round — a 3mm wetsuit or dive skin is all you need. Visibility is exceptional, particularly in the dry season when 30–60m is common at offshore sites.
Most accommodation is on Tutuila (the main island) in and around Pago Pago. Options range from budget guesthouses to comfortable hotels. Ofu and Ta'u in the Manu'a Islands have simple lodges near excellent dive sites.
Pago Pago Marine Charters is the primary PADI dive operation on Tutuila. All boat dives are by charter — there are no scheduled group trips. Book well in advance, bring your own gear (rental availability is unreliable), and confirm current status before travelling. They also operate the only recompression chamber this side of Fiji.
A valid Open Water certification (PADI, SSI, NAUI or equivalent) is required. Dive insurance is strongly recommended — the nearest major medical facilities are in Hawaii. All diving within the Sanctuary is strictly no-take: no fishing, no coral collection, no feeding fish.
Ready to Dive?
Whether you're a seasoned technical diver or just got your open water card, American Samoa's underwater world is waiting for you. Get in touch for dive site recommendations, operator referrals, or trip planning advice.
dive@scuba.as