Climate: tropical; northwest monsoon (December to March), southeast monsoon (May to October); slight seasonal temperature variation
Terrain: mostly mountains with coastal lowlands and rolling foothills
Elevation extremes: lowest point: Pacific Ocean 0 m
highest point: Mount Wilhelm 4,509 m
Natural resources: gold, copper, silver, natural gas, timber, oil, fisheries
Land use: arable land: 0.1%
permanent crops: 1%
permanent pastures: 0%
forests and woodland: 92.9%
other: 6% (1993 est.)