Cyclone brewing in Coral Sea

The weather bureau says a low-pressure system in the Coral Sea could develop into a cyclone this week.

The weather bureau is closely monitoring two cyclones that have formed off the Queensland coast. (AAP)

There's a good chance a cyclone will develop in the Coral Sea this week.

The Bureau of Meteorology is monitoring a low-pressure system inside a monsoon which extends from Papua New Guinea to the Solomon Islands, about 1000 kilometres northeast of Cairns.

Senior forecaster Michelle Berry says there is a more than 50 per cent chance the low-pressure system will develop into a cyclone on Wednesday.

"The system is very disorganised but there is a possibility of it moving westward to the Queensland coast," she told AAP.

"It's a good time for people to revisit their cyclone preparedness and have their cyclone kit ready."

If a cyclone forms and moves towards Queensland, it would be the first of the season for the north.