Sydneysiders heading out to the Easter Show at Sydney Olympic Park should expect soggy rides and mud in the show barns.

Rain and temperature in the twenties are expected for Sydney and NSW this Easter holidays.

A cockatoo sits among the autumnal leaves on Leichardt Street, Blackheath as a cool change rolls in. Credit:Nick Moir

"Friday has had fairly steady light rain, but on Saturday there will probably be heavy falls in Sydney and particularly in the northern Hunter area and the mid north coast," senior Bureau of Meteorology forecaster Neale Fraser said.

"It won't be a good day for the Easter Show tomorrow."