Geography of Tonga
Tonga is located in Oceania, an archipelago in the South Pacific Ocean, directly south of Western Samoa and about two-thirds of the way from Hawaii to New Zealand. Its 169 islands, 96 of them inhabited, are divided into three main groups--Vava'u, Ha'apai, and Tongatapu--and cover an 800-kilometer (500 mi.)-long north-south line. The largest island, Tongatapu, on which the capital city of Nuku'alofa is located, covers 257 square kilometers (99 sq. mi.). Geologically the Tongan islands are of two types: most have a limestone base formed from uplifted coral formations; others consist of limestone overlaying a volcanic base.The climate is basically subtropical with a distinct warm period (December-April), during which the temperatures rise above 32oC (90oF), and a cooler period (May-November), with temperatures rarely rising above 27oC (80oF). The temperature increases from 23oC to 27oC (74oF to 80oF), and the annual rainfall is from 170 to 297 centimeters (67-117 in.) as one moves from Tongatapu in the south to the more northerly islands closer to the Equator. The mean daily humidity is 80%.
Geographic coordinates: 20 00 S, 175 00 W
Map references: Oceania
Area:
total:
748 sq km
land:
718 sq km
water:
30 sq km
Area - comparative: four times the size of Washington, DC
Land boundaries: 0 km
Coastline: 419 km
Maritime claims:
continental shelf:
200-m depth or to the depth of exploitation
exclusive economic zone:
200 nm
territorial sea:
12 nm
Climate: tropical; modified by trade winds; warm season (December to May), cool season (May to December)
Terrain: most islands have limestone base formed from uplifted coral formation; others have limestone overlying volcanic base
Elevation extremes:
lowest point:
Pacific Ocean 0 m
highest point:
unnamed location on Kao Island 1,033 m
Natural resources: fish, fertile soil
Land use:
arable land:
24%
permanent crops:
43%
permanent pastures:
6%
forests and woodland:
11%
other:
16% (1993 est.)
Irrigated land: NA sq km
Natural hazards: cyclones (October to April); earthquakes and volcanic activity on Fonuafo'ou
Environment - current issues: deforestation results as more and more land is being cleared for agriculture and settlement; some damage to coral reefs from starfish and indiscriminate coral and shell collectors; overhunting threatens native sea turtle populations
Environment - international agreements:
party to:
Biodiversity, Climate Change, Desertification, Law of the Sea, Marine Life Conservation, Nuclear Test Ban, Ozone Layer Protection, Ship Pollution
signed, but not ratified:
none of the selected agreements
Geography - note: archipelago of 170 islands (36 inhabited)
- See also : Tonga