Micronesia in May: Weather, Crowds & What to Expect

Palau & Yap (Palau; Yap State, FSM)

By May humidity generally increases and showers occur more regularly, signalling the approach of the wetter half of the year; sea conditions can shift from glassy to choppy with little notice. Koror and Yap Town see more sporadic heavy rains, and low‑lying areas on Yap can puddle quickly; divers note more plankton in the water at times, which can reduce visibility but improve some marine sightings. Bring waterproof bags for gear and expect some itinerary disruption from short storms.

Central Caroline Islands (Chuuk, Pohnpei & Kosrae - Federated States of Micronesia)

May marks the start of the wetter half of the year across the central Carolines, with frequent afternoon storms and very high humidity - air temperatures still sit around 29-31°C. Sea conditions may become rougher at times; dive operators in Chuuk and Kosrae watch forecasts carefully and may change schedules on short notice. It’s a green, tropical time for botanists and birdwatchers, but bring long-sleeve shirts to protect against biting insects after rain.

Mariana Islands (Guam & Northern Mariana Islands - Guam; Saipan, Tinian, Rota)

Warming and humid conditions in May mark the approach of the wetter half of the year; daytime temperatures rise to around 28-31°C and rain episodes lengthen. Guam and the Northern Marianas begin to track the broader typhoon season’s onset-though major storms are still a possibility rather than a certainty-and sea states can become choppier. Book refundable or flexible arrangements for inter-island travel and be ready for short-notice weather advisories.

Marshall Islands (Majuro, Kwajalein, Bikini Atoll - Republic of the Marshall Islands)

May ushers in the wetter months with more frequent and heavier rainfall; humidity climbs and the islands can have long, wet spells punctuated by clearer intervals. The sea can be rougher at times and services to outer atolls may be reduced during prolonged bad weather, so plan itineraries with built-in slack. For photographers and birders, the atolls’ vegetation looks vigorous after rains, but pack waterproof gear and insect repellent.

Kiribati (Gilbert Islands) & Nauru

May marks the start of a period when some years bring increased rainfall and in others remain moderate-the Gilbert chain’s rainfall is strongly modulated by ENSO. Sea conditions may become a little rougher in unsettled years, affecting small-boat travel between islets. Visitors should keep abreast of regional climate advisories, carry a reliable water supply plan, and expect variable services in outer villages.