Explore historical and projected climate data, climate data by sector, impacts, key vulnerabilities and what adaptation measures are being taken. Explore the overview for a general context of how climate change is affecting Tuvalu.

Climate Data Historical

Tuvalu has a tropical climate with consistently high temperatures year-round (25-30°C) and high mean annual precipitation (2,500-3,000mm). Precipitation variability is high, with wet years receiving twice as much rainfall as dry years. Variability is linked to regional weather patterns, with higher rates in El Niño years and reduced rates during La Niña years. The tropical cyclone season in Tuvalu tends to run from November to April and the dry season from May to October.


  • Tuvalu’s Second National Communication to the UNFCCC (2015) reports historical increases in both mean and seasonal air temperatures.
  • Minimum air temperatures have risen 0.24°C per decade and maximums by 0.21°C per decade since 1950, while sea surface temperatures have risen 0.13°C per decade since 1970.
  • As small island atolls, Tuvalu’s temperatures are strongly controlled by sea-surface temperatures in the vicinity of the islands. This provides stability in temperatures and mean temperature rises in Tuvalu correlate well with sea-surface temperature rises.


  • No statistically significant changes in annual and seasonal precipitation rates have been observed.
  • Mean annual precipitation rates have tended to be around 500-600mm lower in Tuvalu’s northern-most atoll, Nanumea, than in the capital Funafuti. Nanumea also experiences greater interannual variability with annual rates ranging from 1,000-4,000mm between 2000-2010.

This section provides the options to visualize historical climate data for different timeframes via map and annual cycle chart.


Click on map to change chart data from country aggregated to site-specific data.