Update, 3.15pm: Cyclone Narelle is continuing a path far off the North West Cape, easing concerns about its potential impact.
A blue alert remains for people in or near the coastal and island communities from Mardie to Coral Bay including Onslow, Exmouth and Coral Bay.
The category four cyclone is expected to move to the south south-west and pass well west of the North West of the cape tomorrow.
At 2pm, the Bureau of Meteorology said the cyclone was estimated to be 390km north-west of Exmouth and 660km north north-west of Carnarvon. The cyclone is moving south south-west at 10km/h.
A cyclone watch alert is in action for people in or near the coast from Cape Cuview to Denham, including Canarvon. People in the areas are being urged to stay up to date and prepare for dangerous weather.
The Bureau says gales with wind gusts up to 100km/h could develop on the coast between Onslow and Exmouth today, extending south to Cape Cuview tomorrow.
If the cyclone moves closer to the coast than expected then the Bureau says the gales could extend south to Denham late on Sunday or Monday.
The Bureau has also warned of thunderstorms and high tides possible causing flooding in low-lying areas in western parts of the Pilbara.