The Tiwi Islands have a tropical monsoonal climate, with 2000 mm of rainfall on northern Bathurst Island and 1200 to 1400 mm on eastern Melville Island.
As illas Tiwi teñen un clima monzónico tropical, con 2000 mm de choiva no norte da illa Bathurst e 1200 a 1400 mm no leste da illa Melville.