The weather bureau is warning of a renewed risk of flooding in Sydney, with a month's worth of rain forecast to fall over the next five days.
Hugh McDowell from the Bureau of Meteorology (BOM) said falls of between 60mm and 170mm were possible from tomorrow until Tuesday.
"We've seen a very dry month through June but that's all going to change as we go into July," he said.
People are being urged to monitor conditions as there is a chance of renewed flooding due to the heavy rainfall raising river levels.
Mr McDowell said it was too early to identify the areas that could potentially be impacted as the computer modelling was showing some variability.
"I'd urge people to keep a close eye on warnings in the coming days," he said.
"It's the period from Saturday through to Monday, Tuesday where we should be most concerned and keep the closest eye on it."
Forecasters say the expected downpour comes courtesy of a weather system that is moving up the New South Wales coast.
"There's a weak southerly change moving through into tomorrow evening, and that's going to usher in a period of more unsettled weather as we see a deepening coastal trough over Sydney and the east coast," Mr McDowell said.
He said next week's rainfall was tipped to exceed the average total for July, which stands at 100mm.
"In context, that's more than a month's worth of rain that you'd see in an average month for July."
The forecast is in stark contrast to June, which recorded well-below average rainfall of only about 5mm to 10mm across Sydney for the entire month.
The BOM last week declared La Niña, the weather system which contributed to the record rainfalls and flooding in Australia over the past year, was over.
Mr McDowell said "higher than usual rainfall" was forecast throughout July and into spring as there were still "La Niña-like effects" in the atmosphere.
"There's still a lot of warm sea-surface temperatures, warm water around Northern Australia, and that is contributing to the amounts of moisture and the amount of heat and energy in the atmosphere," he said.
"All of that there can give us increased rainfall."
Sydneysiders can expect some reprieve from the wet weather, with a few dry spells predicted.
