A cyclone warning has been declared for coastal areas from Wickham to Exmouth in the State's north.
A developing tropical low is about 195km north of Port Hedland, moving west at 23kmh along the Pilbara coast.
Tropical Cyclone Warning Centre's Andrew Burton told 6PR radio the low was expected to stay parallel to the Pilbara coast tomorrow and approach the coast between Onslow and Exmouth on Tuesday.
Mr Burton said the low could develop into a category three cyclone by the end of the week as it crosses the west Pilbara coast.
Gales are not expected in the region today but may develop on Monday or Tuesday.
There are no current community alerts but Mr Burton said communities west of Wickham needed to be aware of advices.
"Pilbara communities between Wickham and Exmouth should be starting to make sure they stay up-to-date with cyclone advices and check their cyclone plans in case it does start to approach the coastline," he said.