La Nina is on the way bringing a wet spring and summer

The National Climate Centre expects Pacific Ocean sea surface temperatures to remain above La Nina thresholds through spring and into summer.

The main impact is expected to be felt in the east and north of the continent.

Forecaster Skie Tobin said La Ninas generally brought higher night-time temperatures and a lively cyclone season from November to April.

"La Nina periods are usually, but not always, associated with above-normal rainfall during the second half of the year," she said.

There were prospects for above-average rainfall over large areas of southern Australia in spring.

With Seqwater dams at 94 per cent capacity, it means the storages' flood mitigation capacity will be tested by any heavy rain.

Showers are expected in the southeast tomorrow.