The country can also likely expect an above average number of tropical cyclones, with the peak season starting in November, according to the Bureau of Meteorology.

Australia had its wettest October since 2010 and NSW its wettest since national records began in 1900.

The wet outlook between November and January is due to several climate drivers including La Nina and a negative Indian Ocean Dipole.

"It's looking like the La Nina will continue to be the main driver of our weather across eastern and northern Australia," BoM senior meteorologist Jonathan How said.

"That means more water vapour in the atmosphere and warmer waters around the country which is driving increased rainfall across the east coast, all the way from Queensland down to Victoria and Tasmania."

BoM is also predicting an expected positive phase of the Southern Annular Mode, a non-seasonal north-south belt of westerly winds associated with storms and cold fronts, for most of November and December.

Most water storage bodies in the country's east have reached capacity and are spilling, with the Murray Darling Basin storages at their highest level in over a decade.

Higher than average stream flows are being forecasted for nearly all catchment sites along the east coast and northern Tasmania.

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Communities living near rivers and creeks are being warned to remain prepared over summer for flooding risks.

The La Nina pattern is expected to weaken off in early 2023.

"By February, all of our seven international models say that La Nina should be done and dusted with and that does mean a decreased risk of heavy rain," Mr How said.

Maximum temperatures for much of north-west Australia and Tasmania are likely to be warmer than median.

Large areas of Western Australian are also likely be to drier than usual.