South Australia has increased River Murray water allocations for irrigators.

Many farmers are now likely to get close to their full entitlements, with basin storages having risen to 38 per cent.

The SA Government's Water Delivery Manager Jarrod Eaton says continued improvements in water conditions allowed for the increase.

“Rainfall across key catchment areas has helped to improve conditions across the basin leading to an increase in water availability for South Australian irrigators,” Mr Eaton said.

“Based on climate conditions over the last 30 years and current water resource conditions, water availability projections indicate that under very dry conditions allocations are likely to get to at least 97 per cent - which is a positive sign for water users.”

Bureau of Meteorology data shows basin rainfall was below average for June, but the volume of water in Murray-Darling Basin storages increased to 38 per cent of capacity.

Mr Eaton said officials would be monitoring the bureau's long-term weather outlook, and may issue revised statements while irrigation allocations remained below 100 per cent.