Catió is a city in south eastern Guinea-Bissau. It is the capital of Tombali Region. Population 9,217. Catio, along with Canjadude and other ca…Catió is a city in south eastern Guinea-Bissau. It is the capital of Tombali Region. Population 9,217. Catio, along with Canjadude and other camps were besieged by the Portuguese in 1973. Catió has a tropical monsoon climate featuring hot temperatures year-round, little to no rainfall from November to May and heavy to extremely heavy rainfall from June to October.