Changes in the Tonga climate 

  • Temperatures have warmed and will continue to warm with more very hot days in the future.
  • Rainfall shows no clear trend since the 1940s. Projections of annual rainfall are unclear with some models suggesting a slight increase by the end of the century. Extreme rainfall events are projected to become more frequent and more intense. Drought frequency is projected to decrease slightly by the end of the century.
  • December to March wave heights and periods are projected to decrease slightly.
  • Ocean acidification has been increasing in Tonga’s waters. It will continue to increase and threaten coral reef ecosystems.
  • Sea level near Tonga has risen and will continue to rise throughout this century






Country Information 

Geographic coordinates:               Lat. 150- 230 S, Long. 1730-1770E

Total land area                                   747 km2

Exclusive economic zone (EEZ)    700,000 km2

Population (2010 mid-year)           103,365