Geographic coordinates: 13 28 N, 144 47 E

Map references: Oceania

Area: total: 549 sq km
water: 0 sq km
land: 549 sq km

Area - comparative: three times the size of Washington, DC

Land boundaries: 0 km

Coastline: 125.5 km

Maritime claims: exclusive economic zone: 200 NM
territorial sea: 12 NM

Climate: tropical marine; generally warm and humid, moderated by northeast trade winds; dry season from January to June, rainy season from July to December; little seasonal temperature variation

Terrain: volcanic origin, surrounded by coral reefs; relatively flat coralline limestone plateau (source of most fresh water), with steep coastal cliffs and narrow coastal plains in north, low hills in center, mountains in south

Elevation extremes: lowest point: Pacific Ocean 0 m
highest point: Mount Lamlam 406 m

Natural resources: fishing (largely undeveloped), tourism (especially from Japan)

Land use: arable land: 10.91%
permanent crops: 10.91%
other: 78.18% (1998 est.)

Irrigated land: NA sq km

Natural hazards: frequent squalls during rainy season; relatively rare, but potentially very destructive typhoons (June - December)

Environment - current issues: extirpation of native bird population by the rapid proliferation of the brown tree snake, an exotic, invasive species

Geography - note: largest and southernmost island in the Mariana Islands archipelago; strategic location in western North Pacific Ocean

NOTE: The information regarding Guam on this page is re-published from the 2003 World Fact Book of the United States Central Intelligence Agency. No claims are made regarding the accuracy of Guinea Geography 2003 information contained here. All suggestions for corrections of any errors about Guam Geography 2003 should be addressed to the CIA.