Northern Mariana Islands
TerritoryAdministered by: United States
“Saipan's Grotto, Tinian's bomb pits and the deepest place in the ocean offshore.”
The Northern Mariana Islands are a US commonwealth of fourteen islands, of which three — Saipan, Tinian and Rota — are populated. The 1944 battles here were among the costliest of the Pacific war, and Saipan carries that everywhere: Banzai Cliff and Suicide Cliff, where hundreds of Japanese civilians jumped rather than surrender, the last Japanese command post, and rusting armour on the invasion beaches.
On Tinian, two loading pits at North Field are where the atomic bombs were put aboard the aircraft that flew to Hiroshima and Nagasaki — marked, glassed over and extraordinarily quiet. Saipan's Grotto is a collapsed limestone cavern connected to the sea by tunnels and is one of the world's best-known cavern dives. And a few kilometres east, the Mariana Trench drops to nearly 11,000 metres, the deepest point in any ocean, protected as a US marine national monument.
Highlights
The Grotto
A collapsed limestone cavern on Saipan's northeast coast, connected to the open sea by three tunnels, with light shafts and blue water. Reached down 100-odd steps, and one of the best-known cavern dives anywhere — surge makes it advanced-only in swell.
Tinian's North Field
The atomic bomb loading pits, the runways from which the 509th Composite Group flew, and a vast abandoned airfield being reclaimed by jungle. Sobering, deserted and preserved as a National Historic Landmark.
Banzai and Suicide Cliffs
Sites on Saipan's north where hundreds of Japanese soldiers and civilians died in July 1944 rather than surrender. Memorials from several nations stand there and the place is treated as a cemetery.
Managaha and the lagoon
A small islet in Saipan's western lagoon with white sand and clear shallows, reached by ferry — the light counterpoint to the island's history.
Entry requirements for Northern Mariana Islands
Checking your passport…
We don't hold entry details for this passport group yet.
Before you fly
The detail
- Passport validity
- Most destinations want validity beyond your stay, and some want six months. Check yours against the return date.
- Onward travel
- Airlines may ask for a return or onward ticket at check-in.
- Health
- Commonwealth Healthcare Corporation on Saipan handles routine care; serious cases go to Guam or Honolulu. No malaria. Dengue occurs occasionally.
- Money
- US dollar. Cards work at hotels and larger businesses; carry cash on Tinian and Rota. ATMs on Saipan.
When to go
BestDec–May. AvoidJul–Oct.
Dry season; cool trades and calm seas.
The band above each month is our editorial verdict - it weighs crowds, prices and access as well as weather. The line is average daily temperature, the bars are monthly rainfall. Select a month for the figures. Climate figures: ERA5 reanalysis via Open-Meteo, 2005–2024 normals.
What it costs
A day in Northern Mariana Islands
Comfortable · sample day
≈ $162
Line items are real prices we track. The daily budget is an editorial estimate for this level, not their sum.
Where this sits among 244 countries we have costed
Rates track Korean and Japanese holiday periods. The post-2020 contraction in visitor numbers has left prices softer than they were and some properties closed.
Updated Aug 2026 · Editorial synthesis — Marianas Visitors Authority data and accommodation sampling (2025–2026) · confidence medium
Excludes international flights - they depend on where you fly from.
Regions to know
5Garapan and western Saipan
The main town, the lagoon, Managaha island, the American Memorial Park and most of the hotels.
Northern Saipan
The Grotto, Banzai and Suicide Cliffs, the last command post and Bird Island lookout.
Southern Saipan
The airport, Obyan and Ladder beaches, the latte stone site at As Nieves and Mount Tapochau in the middle.
Tinian
North Field's atomic bomb pits, the House of Taga latte stones, Taga Beach and a very quiet island.
Rota
The greenest island — the latte stone quarry, Swimming Hole, birdlife and diving with almost no other divers.
Practical guide
Getting there
Saipan International is served by United from Guam, Asiana and Jeju Air from Seoul, and other regional carriers. Most itineraries connect through Guam, Seoul or Tokyo.
Getting around
A hire car is essential on Saipan; there is no meaningful public transport. Star Marianas flies to Tinian and Rota several times a day on small aircraft.
Money & costs
US dollar. Cards work at hotels and larger businesses; carry cash on Tinian and Rota. ATMs on Saipan.
Safety
Generally safe. The hazards are marine — the Grotto's surge, currents at the north coast and sharp reef — plus typhoons in season. Unexploded ordnance from 1944 is still found; do not touch anything metallic in the jungle.
Health
Commonwealth Healthcare Corporation on Saipan handles routine care; serious cases go to Guam or Honolulu. No malaria. Dengue occurs occasionally.
SIM & internet
IT&E and Docomo Pacific. Many US plans include the CNMI at domestic rates. 4G on Saipan; more limited on Tinian and Rota.
Driving
Right-hand traffic with US signage and a 35 mph maximum. Saipan's roads are in variable condition, and the tracks to some northern sites need clearance. Tinian and Rota have almost no traffic at all.
Rules change - verify with an official source before you rent.
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Northern Mariana IslandsFrequently asked questions
What entry rules apply?
US immigration law — ESTA for Visa Waiver Program nationals, a US visa otherwise. The Guam-CNMI Visa Waiver Program additionally admits Korean and Taiwanese visitors for 45 days for these islands and Guam only. A discretionary parole arrangement for Chinese and Russian visitors has been changed repeatedly, so verify current terms.
How do I get to Tinian and Rota?
Small aircraft from Saipan take about ten minutes to Tinian and half an hour to Rota, on Star Marianas and other operators. A ferry to Tinian has operated intermittently. Both islands are quiet, with limited accommodation and few restaurants — day trips work well.
What happened to the tourism economy?
It depended heavily on Chinese and Korean arrivals, which collapsed after 2020 and have recovered unevenly. Several large hotels and the casino in Garapan closed or scaled back. The result is fewer visitors and some faded infrastructure — check that your accommodation is actually operating.