Micronesia.

Treat FSM not as a destination but as four very different ones, the right itinerary is built state by state. Chuuk (Truk Lagoon) is, simply, the world's best wreck dive. In February 1944 the US Navy's Operation Hailstone caught the Imperial Japanese Combined Fleet's forward base and sank everything in the lagoon over two days. Sixty-plus warships and merchant transports, including the Fujikawa Maru with its perfectly preserved Zero fighters in the cargo hold, the Shinkoku Maru dripping in soft coral, the San Francisco Maru with its tanks on the deck, and the Nippo Maru with field guns, sit in 12–60m of warm clear water. There is no other lagoon like this. Yap, by contrast, is the cultural anti-Chuuk: thatched faluw men's houses, women still wearing grass skirts in some villages by choice rather than performance, the rai stone-money economy genuinely still operating, and Mil Channel manta ray dives that reliably deliver close encounters from December through April. Pohnpei is where the country's lushness peaks, the rainforested interior, multi-stage waterfalls (Kepirohi, Liduduhniap), the dramatic basalt plug of Sokehs Rock rising over Kolonia harbour, and Nan Madol itself, a 100-hectare ruined city built on 92 artificial coral islets that has invited comparisons to Angkor and remains one of the most mysterious archaeological sites on earth. Kosrae is the quiet one, a single island state, dense mangrove channels, untouched reef, sleepy resorts, and the highest visibility in the country. Most divers do Chuuk; most cultural travellers do Yap and Pohnpei; the few who do all four leave understanding that 'Micronesia' as a single label is misleading. Each state is a destination.

FSM straddles around 6–10°N of the equator, so the temperature is essentially constant at 25–31°C year-round, with water temperatures of 27–29°C, but rainfall and wind patterns shift state by state. The country has two broad seasons: a drier, breezier season from December through April (more reliable trade winds from the northeast, calmer lagoon surfaces in many places, better underwater visibility, the most dependable inter-island flight schedules), and a wetter, calmer-wind season from May through November (heavier rain, occasional multi-day spells, weaker trades, but warmer surface water). However, FSM is one of the rainiest places on earth, Pohnpei's interior receives 7,000–10,000 mm/year, and even "dry season" months get regular showers; you are not coming here for a sunburn. Each state has its own quirks: Chuuk is fairly consistent, with diving comfortable year-round; Yap's manta ray season at Mil Channel runs strongest December–April when the mantas aggregate to clean and feed; Pohnpei can flood with multi-day rain even in the dry season, and Nan Madol access depends on tides; Kosrae is wet most of the year but with the best visibility of the four states. Typhoon risk: FSM sits along the genesis zone of western Pacific typhoons, but most strengthen as they track north and west toward Guam and the Philippines, so direct hits on inhabited islands are uncommon (the most catastrophic recent exception was Typhoon Maysak on Chuuk and Yap in 2015). The highest typhoon-genesis density is roughly July–November. Cultural moments: Federation Day on May 10, Independence Day on November 3, plus state-specific observances (Yap Day on March 1 is one of the best traditional cultural celebrations in the Pacific, chanting, dancing, and bamboo stick dances in full costume).

FSM is connected by exactly one regular international air service: United Airlines' "Island Hopper", the legendary route between Honolulu and Guam which stops at Majuro (Marshall Islands), Kwajalein, Kosrae (KSA), Pohnpei (PNI), and Chuuk (TKK), typically operating 3–4 times weekly each direction. Yap (YAP) is reached separately via United's Guam–Yap–Palau loop, also several times weekly. There is no inter-state ferry; if you want all four states, you fly. Day-of cancellations are not unheard of, especially in wet season, build buffer days into any multi-state itinerary. Visas: most Western passports, US, EU, UK, Canada, Australia, NZ, Japan, get 30 days visa-free on arrival. The Compact of Free Association allows US citizens to live and work indefinitely. You will need proof of onward travel and accommodation. Currency: the US dollar is the only legal tender. ATMs exist in Pohnpei (Kolonia), Chuuk (Weno), and Yap and Kosrae but are unreliable, bring USD cash in small bills as backup, especially for outer islands and tipping dive crews. Daily costs in 2026 vary by state: budget travellers should plan USD 90–150/day in Yap, Kosrae, and Pohnpei, slightly higher on Chuuk where most accommodation is built around dive operators; mid-range USD 150–250/day; diving liveaboards and dive resorts run USD 200–500/day all-inclusive (Chuuk's Odyssey and Truk Master liveaboards plus the legendary Blue Lagoon Resort are the iconic options). Hotel rooms in state capitals run USD 80–180, dive resorts USD 150–350 with meals. Restaurant meals USD 8–25. English is universally spoken in tourism, government, and signage, alongside Yapese, Chuukese, Pohnpeian, Kosraean, and several outer-island languages. Internet is satellite-dependent and slow. Public holidays for scheduling: FSM Constitution Day (May 10), United Nations Day (October 24), FSM Independence Day (November 3), Christmas / New Year, plus state-specific days (Yap Day is March 1, book Yap accommodation 6+ months ahead for that week).