More water has been allocated to Goulburn system irrigators in the latest update by the Resource Manager for Northern Victoria.
The Murray system remains unchanged at 66 per cent of high-reliability water shares, but Goulburn and Campaspe systems have lifted from 36 to 40 per cent.
The Campaspe system remains unchanged at 100 per cent.
The Broken system increases from 3 per cent to 6 per cent and the Bullarook system increases from 16 per cent to 32 per cent.
Resource manager Mark Bailey said recent rainfall had increased water availability in the Goulburn, Loddon, Broken and Bullarook systems.
"The catchments are responding to rain," Dr Bailey said.
"The soils are wetter and rain is turning into run-off more quickly than in recent weeks.
"However, the flows into the major storages are still well below average for this time of year. Further rain is needed for more run-off, greater volumes in storage, and larger seasonal determination increases."
Dr Bailey added that Bureau of Meteorology seasonal outlooks indicated a drier spell was likely for northern Victoria.
"Rainfall in the period August to October, which covers the period of highest average flow into the major storages, is likely to be less than average across most of Victoria," he said.
Dr Bailey advised entitlement holders to use the weather information and seasonal determination outlooks to plan their water needs in 2017/18.