Swan River

Last Updated: April 25, 2026

Total streamflow across the Swan River was last observed at 1,960 cfs, and is expected to yield approximately 3,888 acre-ft of water today; about 148% of normal. River levels are high. Average streamflow for this time of year is 1,326 cfs, with recent peaks last observed on 2022-06-22 when daily discharge volume was observed at 7,050 cfs.

Maximum discharge along the river is currently at the Swan River Near Bigfork Mt reporting a streamflow rate of 1,960 cfs. This is also the highest stage along the Swan River, with a gauge stage of 3.8 ft at this location. This river is monitored from 2 different streamgauging stations along the Swan River, the highest being situated at an altitude of 3,081 ft, the Swan River Near Bigfork Mt.

The Swan River is a significant river in Western Australia, running approximately 65 kilometers from its source in the Perth Hills to the Indian Ocean.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-25
Discharge Volume 3,888 ACRE-FT
Streamflow 1,960.0 cfs
Past 24 Hours: +100.0 cfs (+5.38%)
Percent of Normal 147.78%
Maximum 7,050.0 cfs
2022-06-22
Seasonal Avg 1,326 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Swan River Near Bigfork Mt
USGS 12370000
1960 cfs 3.8 ft 12.05
Swan River At East Patchogue Ny
USGS 01305500
13 cfs 0.53 ft -3.65
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Swan River is a river in the south west of Western Australia. Its Aboriginal Noongar name is the Derbarl Yerrigan. The river runs through the metropolitan area of Perth, Western Australia's capital and largest city.