Queensland remains on flood watch, with storms and heavy rainfall forecast to lash the state's southeast and southern inland.

The region's catchment areas are saturated after days of rain, leading to heavy runoff and possible flash flooding, Bureau of Meteorology forecaster Kimba Wong says.

"There has been significant rainfall and as the catchment is very wet, its capacity to soak up more rainfall is reduced," Ms Wong said.

"So when we have the significant rainfalls that we have seen in recent days, there can be rapid responses from the rivers with the catchments so wet."

Flood warnings remain current for coastal catchments stretching from Bundaberg to the NSW border, with the southern inland also bracing for heavy falls.

More rain is also forecast for the drenched towns of Dalby, Oakey, Applethorpe, Warwick and Roma, which have already surpassed their average February rainfall total.

Oakey and Warwick exceeded their monthly average in a day.

"We are expecting further showers and thunderstorms to pop up in the next couple of days, with the potential for heavy rainfall continuing through southeast Queensland," Ms Wong said.

"Widespread rainfall totals (of) 50 to 100mm are not out of the question and certainly some higher rainfall total will be dotted in the mix as well as severe storm pop-up."

Tropical Cyclone Uesi has formed in the Coral Sea northwest of Vanuatu, and is tracking south to south-southwest.

It is also expected to affect conditions from Fraser Island to northern NSW but is not likely to make landfall.

Although the cyclone is forecast to weaken as it approaches the coastline, swells of up to four metres will cause hazardous conditions and possible beach erosion.

Shark nets and baited hooks have been pulled from all Gold Coast and Sunshine Coast beaches, Rainbow Beach, Bribie Island and North Stradbroke Island ahead of the wild weather.

The falls have been welcomed across the water grid, with storage capacity at almost 60 per cent, rising from 56.4 per cent on February 7.