Still recovering from the devastating rains and floods that came in the first two months of the year, Queensland has yet to face possible further damage as a low monsoon off its northern part could develop towards end of the week into a Category 3 cyclone to be named Sandra.

Weather forecasters from the Bureau of Meteorology (BoM) said they expect the low monsoon to intensify into a cyclone by early Thursday morning. If that occurs, the system, which is currently producing a large wind field, could bring big swells to Queensland beaches, bringing further damage to the state's already eroded beaches, particularly Mooloolaba beach.

As of 6am on Wednesday, a coastal waters wind warning was issued for Cairns to Point Lookout, including Hervey Bay.

"A high [1024 hPa] over the Tasman Sea extends a firm ridge along the southern and central Queensland coasts,'' the warning said.

"The monsoon trough is situated over northern Queensland and the northern Coral Sea."

"A low [999 hPa] is situated along the monsoon trough, approximately 260 nautical miles east northeast of Bowen, and it is expected to deepen while moving in a general eastwards direction away from the Queensland coast over the next few days.''

David Grant, weather Bureau forecaster, said gauge models showed the low monsoon system will remain offshore at least into the weekend.

"After that we should know if it's going to develop a westward track," he added.

Ex-Tropical Cyclone Oswald badly damaged Mooloolaba Beach in south-east Queensland in January.

Estimated cost to repair the beach, foreshore and rock wall at the iconic beach has been placed at $500,000.