Het weer in Alofi in december

There isn't much March-specific detail in Niue's forum - most posts reference the island's mild year-round average rather than any one month - but March itself sits within the Pacific cyclone season and Niue's own climate record shows it running warmer and noticeably wetter than that broader annual average would suggest. One practical note that did come up: pack mosquito repellent, since a visitor specifically mentioned more bugs around during a March stay. It's still a genuinely warm, tropical month, just a wetter one than the postcard 'average day in Niue' figure implies.

Forum posters describe September daytime temperatures in the early 30sC, dropping to the mid-20sC at night, sitting within the May-through-November stretch posters consistently name as Niue's best weather window and a real improvement over the wetter December-April season. Posters flag September as peak season here (running June through September), so booking accommodation well ahead is standard advice. Posters specifically highlight a wildlife draw tied to this exact time of year: humpback whales are present in Niue's waters from June through September or early October, with late August into September flagged as an especially good window since calves are typically born by then. Posters generally caution that no forecast anywhere can be fully guaranteed, but September sits confidently within the island's more reliable half of the year.