Iron ore shipments from Port Hedland, one of the world’s largest export terminals, rose to 17.78 million tonnes in March from 12.85 million tonnes in February, data released by the port authority showed.
It was the first increase in exports out of Port Hedland since December.
Shipments had fallen in January and February on seasonal and weather-related disruptions.
Officials at Port Hedland, which is used by BHP Billiton Ltd and Fortescue Metals Group Ltd and shipped more than 180 million tonnes of iron ore in 2010, said earlier that the port was closed for several days in February due to tropical cyclone Carlos.
Australia is the world’s largest exporter of iron ore, a key steelmaking ingredient.