Cyclone brewing in Coral Sea

There's a good chance a cyclone will develop in Queensland's Coral Sea tomorrow.

The Bureau of Meteorology is monitoring a low-pressure system inside a monsoon trough that extends from Papua New Guinea to the Solomon Islands.

Senior forecaster Michelle Berry says there is a more than 50 per cent chance the system will develop into a cyclone tomorrow.

She says the system is very disorganised but it could move westward to the Queensland coast.