Our water overview

Updated: Thursday, 28 May 2020

Current

42.5%

268 GL

Last year

45%

284 GL

Change

5.7%

-16.2 GL

To 9am

0.00

mm

May total

May average*

32.20

mm

88.70

mm

Perth Monthly Rainfall

Check rainfall and find out how declining rainfall is affecting the amount of water that flows into our dams.

Perth monthly rainfall totals

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL
2020 3.0 33.2 32.6 12.6 63.0 N/A N/A N/A N/A N/A N/A N/A 144.4
2019 7.2 0.2 6.2 44.2 17.8 212.0 108.6 114.4 31.0 20.2 17.8 2.2 581.8
Avg 1994 - 2017* 16.7 13.0 21.0 37.2 88.7 126.9 146.6 122.1 87.0 38.7 23.2 11.7 732.8
Avg 1876 - 2016** 9.7 12.5 19.5 44.2 116.9 173.1 167.7 132.9 81.0 51.5 22.4 13.1 844.5
N/A = Data not available. Rainfall measured in mm.
* Average monthly rainfall data supplied by the Bureau of Meteorology for the period 1994 to 2017.
** Average monthly rainfall (for the period 1876 - 2016).

Perth Monthly Rainfall Comparison

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL
2020 3.0 33.2 32.6 12.6 63.0 N/A N/A N/A N/A N/A N/A N/A 144.4
2019 7.2 0.2 6.2 44.2 17.8 212.0 108.6 114.4 31.0 20.2 17.8 2.2 581.8
2018 106.2 0.2 2.6 20.6 67.4 126.4 152.0 186.0 35.2 40.0 3.2 1.8 741.6
2017 45.4 137.2 23.6 0.0 70.8 88.0 172.6 151.6 77.4 42.0 4.8 40.6 854.0
Avg 1994 - 2017* 16.7 13.0 21.0 37.2 88.7 126.9 146.6 122.1 87.0 38.7 23.2 11.7 732.8
N/A = Data not available. Storage measured in mm.
* Mean monthly rainfall data supplied by the Bureau of Meteorology for the period 1994 to 2017.

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec TOTAL
2020 3.0 36.2 68.8 81.4 144.4 N/A N/A N/A N/A N/A N/A N/A 144.4
2019 7.2 7.4 13.6 57.8 75.6 287.6 396.2 510.6 541.6 561.8 579.6 581.8 581.8
2018 106.2 106.4 109.0 129.6 197.0 323.4 475.4 661.4 696.6 736.6 739.8 741.6 741.6
2017 45.4 182.6 206.2 206.2 277.0 365.0 537.6 689.2 766.6 808.6 813.4 854.0 854.0
Avg 1994 - 2017* 16.7 29.7 50.7 87.9 176.6 303.5 450.1 572.2 659.2 697.9 721.1 732.8 732.8
N/A = Data not available. Storage measured in mm.
* Mean monthly rainfall data supplied by the Bureau of Meteorology for the period 1994 to 2017.

Year Summer Autumn Winter Spring TOTAL
2020 38.4 108.2 0.0 0.0 146.6
2019 9.2 68.2 435.0 69.0 581.4
2018 147.0 90.6 464.4 78.4 780.4
2017 192.8 94.4 412.2 124.2 823.6
Avg 1994 - 2017* 41.4 146.9 395.6 148.9 732.8
N/A = Data not available. Storage measured in mm.
* Mean monthly rainfall data supplied by the Bureau of Meteorology for the period 1994 to 2017.

Our water sources

Our water supply is made up of a combination of sources, including desalinated seawater, groundwater, groundwater replenishment and streamflow. As climate change continues to have a profound impact on our water supply, we must plan our future by securing climate-resilient water sources. Below is a breakdown of our water sources.

You can also learn more about where your water comes from on our Perth's water supply tool.
Desalination icon
%
Desalination
Groundwater icon
%
Groundwater
Dams icon
%
Dams
Groundwater replenishment icon
%
Groundwater replenishment