Tuvalu is comprised of nine small islands, six of them being atoll islands (with lagoons) namely Nanumea, Nui, Vaitupu, Nukufetau, Funafuti, and Nukulaelae. The remaining three,
Nanumanga, Niutao and Niulakita are raised limestone reef islands. None of the islands are more than three metres above sea level, with the biggest island, Vaitupu, having a land area of just over 1000 acres. The total land area is approximately twenty-six square kilometres with a sea area of 900,000 square kilometres. During the pre-independence period, 1938 - 1978,
The UNEP CIS-Pac5, GCF funded project introduces 2 additional Automated Weather Stations on the Eastern and Northern sides of the Island, strengthening the monitoring systems for Niue Meteorological Services completed in May 2023.