Rain has arrived in the Eurobodalla Shire on Sunday, July 12, and damaging weather is expected on Monday, with the possibility of an East Coast Low, the Bureau of Meteorology says.
There is a marine gale warning for the Batemans Coast, and a sheep graziers warning for the South Coast for Monday, July 13.
A rainfall range of 80-120mm is expected in Batemans Bay and Narooma, and 90-150mm expected at Moruya.
Eurobodalla Shire's SES crews, Moruya and Batemans Bay, were preparing for a possible spike in jobs.
SES encouraged residents to prepare for possible thunderstorms and periods of heavy rain.
A Bureau of Metereology spokesperson said there was likelihood of a Coastal Low developing in parts of eastern NSW, and potentially an East Coast Low.
"Such a system could bring severe weather to some coastal regions between Sunday and Wednesday," the spokesperson said.
"This includes the possibility of heavy rainfall, road and riverine flooding, damaging winds strong enough to bring down trees and powerlines, and large seas resulting in dangerous beach conditions and potential coastal erosion.
"This is a dynamic system, so there is still uncertainty with the exact positioning, movement and strength of the low.
"Both Coastal Lows and East Coast Lows display cyclonic circulations and can bring severe weather, however East Coast Lows are more intense systems that can last for several days, as opposed to Coastal Lows that usually have a much shorter duration."
More information, go to bom.gov.au and ses.nsw.gov.au