Sydney Harbour

Middle Harbour | Nth Harbour | Port Jackson

Lane Cove River | Parramatta River

Friday 22 January 2021

Issued at 7:30 AM

Rainfall data has been used to predict the likelihood of bacterial contamination at swimming sites in Sydney Harbour.

Hover over maps for council updates, the latest weekly star ratings and annual Beach Suitability Grades.



For information on beach closures please contact relevant authorities such as local councils.
Sydney Water has advised of a sewage overflow in Wollstonecraft on 21 January 2021 which may affect Sydney Harbour. As a precaution, swimming should be avoided at Balls Head Bay near Gore Cove Reserve due to the possibility of pollution. Contact Sydney Water on 13 20 90 for details.


Pollution is unlikely Pollution is unlikely, enjoy your swim!
Pollution is possible Pollution is possible, take care.
Pollution is likely Pollution is likely, avoid swimming today.
Update Updated information available.

More information about this forecast


As a general precaution, swimming in Sydney Harbour should be avoided for up to three days following rainfall or for as long as stormwater is present.

* Please note water temperature in estuarine areas can be warmer in summer and cooler in winter than the reported ocean temperature.

Beach Conditions

Weather – Sunny morning. Medium chance of showers and the chance of a thunderstorm during this afternoon and evening. 

Winds – Light becoming NE 20 to 30 km/h in the early afternoon.

Rainfall – 2.5mm in the previous 4 days.

Expected maximum temperature – 31oC

Ocean temperature – 22oC

Swell – Southerly 1.5 to 2.5 metres, decreasing to 1 to 1.5 metres around midday.

High tide – 1.2 metres at 16:11

Low tide – 0.76 metres at 10:26



Report pollution 131 555
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