Elsewhere, there are roughly equal chances of above or below median rainfall, the Bureau of Meteorology (BOM) reported.
Above median rainfall is likely for most of the Northern Territory, Queensland, New South Wales, Victoria, northern Western Australia and eastern Tasmania, increasing to very likely for far northern WA, northern NT and northern Queensland.
There is an increased chance of unusually high rainfall for April to June across the northern tropics and most of the rest of Queensland, most of New South Wales and parts of Victoria and eastern Tasmania.
The BOM April outlook shows above median rainfall is likely across much of the country, increasing to very likely for far northern WA, northern NT, northern Queensland and parts of south-east Queensland and north-east New South Wales. Roughly equal chances of above and below median rainfall are likely for southern WA and western Tasmania.
The May outlook shows a wetter month is likely for parts of the north, and a drier month is likely for parts of the south-west, but most areas have roughly equal chances of a wetter or drier month.
April to June maximum temperatures are likely to be above median for western, northern and south eastern parts of Australia.
There is an increased chance of unusually high maximum temperatures for April to June over western and far northern WA, the northern NT, most of Queensland except the south-west and south-east, far south-east SA, western Victoria and Tasmania, with the highest chances in the north-east Australia and western Tasmania.
Minimum temperatures for April to June are likely to be warmer than median across most of Australia with much of northern and eastern Australia very likely.
According to BOM, La Nina and other localised drivers are likely to be influencing the April to June outlook.