Water Outlook

We collaborate with the retail water companies to produce the Water Outlook: a summary of the state of Melbourne's water supply and demand which is published by 1 December each year.

The Water Outlook sets out the actions to be taken by the water businesses to maintain safe and reliable supplies. The outlook is based on storage volumes in the Melbourne water supply system on 30 November each year and applies for the year ahead.

The Outlook includes information on water availability, water storages, water use and short-to-medium term management of Melbourne's water resources.

Water Outlook at December 2019

Melbourne’s water storages are secure, though real and growing challenges to our water supply availability requires us all to act. Permanent water saving rules and the Target 155 voluntary water efficiency program continue to encourage Melburnians to use water wisely.

Find more information:

Bureau of Meteorology climate and water information

The Bureau of Meteorology provides a number of seasonal outlooks which can be used to support our water resources planning. These are regularly updated and typically cover a three-month period.

Climate outlooks

Climate outlooks show the likelihood of the next three months being wetter or drier and warmer or cooler than usual.

Seasonal streamflow forecast

The Seasonal streamflow forecast  for the next three months at sites across Australia – including five sites in eastern Victoria that flow into Melbourne’s major harvesting reservoirs:

  • Thomson Reservoir – total inflow
  • Upper Yarra Reservoir – total inflow
  • O’Shannassy Reservoir – total inflow
  • Maroondah Reservoir – inflow from Watts River
  • Maroondah Reservoir – inflow from Graceburn Creek

ENSO update

The ENSO update provides the current state of the Pacific and Indian oceans, and assess the likely evolution of the El Nino-Southern Oscillation (ENSO) as it transitions through the different phases of El Niño, La Niña and Neutral.

Australian landscape water balance

The Australian landscape water balance presents current and historical information on soil moisture, rainfall, runoff and evapotranspiration for Australia, including the Melbourne region.

Climate outlooks by other agencies

Data from other sources provide alternative climate outlooks on potential rainfall and temperature for Australia including the Melbourne region. 

Source Outlooks available
APEC Climate Center (APCC) - Asia-Pacific Economic Cooperation Rainfall and temperature (6month)
JAMSTEC - Japan agency for marine earth science and technology  Rainfall and temperature (9 month)
The Met Office - UK's national meteorological service  Rainfall and temperature (5 month)
ECMWF and EUROSIP - European centre for medium range weather forecasts Rainfall and temperature (6 month)
Climate Prediction Center, National Weather Service - NOAA  Rainfall and temperature (6 month)
International Research Institute for climate and society - Columbia University (USA) Rainfall and temperature (6 month)
Last updated:
29 November 2019