September remains within the broad wet season with variable conditions across states-some islands may be wetter than others. Check local forecasts before scheduling boat transfers.
Average daily low and high (°C) and monthly rainfall. The badge shows how it feels, allowing for humidity.
Temperature map
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Average temperature across Federated States of Micronesia in September.
Where to Go in Federated States of Micronesia in September
Yap & the Outer Islands
October often carries the season’s heaviest rains and gusty trades at times; while Yap commonly escapes catastrophic typhoons, the risk of significant systems passing nearby increases and can disrupt flights to Guam or Pohnpei. The lagoon itself may see brown runoff after heavy downpours, reducing underwater visibility for several days. Plan conservatively: allow extra days for inter-island connections, keep important documents dry, and choose lodging with secure power and freshwater supplies.
Chuuk Lagoon & Central Islands
October’s weather often remains unsettled with intermittent heavy squalls and occasional storm systems passing through the Caroline Islands; sea conditions can swing from glassy to rough within a day. Trip cancellations to outer islands become more common, and local operators may run shorter, sheltered excursions around Weno. For divers, this is a shoulder season with bargains but higher likelihood of aborted dives and lower underwater visibility after heavy rain.
Pohnpei - Kolonia, the Highlands and Mount Nanlaud
October often continues the pattern of heavy tropical showers and stronger seas, and the island’s rivers can flood roads in low-lying sections after prolonged storms. Cultural sites and guesthouses stay open but travel logistics are the main challenge - pack a good rain jacket, waterproof boots and a willingness to delay a ferry. When there is a clear spell, the waterfalls and jungle are at their most dramatic, but these clear windows are unpredictable.
Kosrae & Lelu Island
October tends to remain changeable with a mixture of heavy showers and occasional clear spells; coastal waters can be churned by long-period swells after storms, reducing snorkel and dive visibility. The island’s forests stay lush and hiking pays off when you catch a clear morning, but plan for wet conditions and evening damp. Have travel insurance and a flexible schedule if you visit during this month.
Events & Festivals in September
There are no major festivals or events in Federated States of Micronesia during September to be aware of.
Planning a trip to Federated States of Micronesia?
See how September compares with the rest of the year, then read the full guide.
