Sydney Harbour

Middle Harbour | Nth Harbour | Port Jackson

Lane Cove River | Parramatta River

Monday 24 September 2018

Issued at 12:55 PM

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.



Sydney Water has advised of a sewage overflow on 20 September 2018 in Wollstonecraft which may affect Balls Head Bay. As a precaution, swimming should be avoided in this area due to the possibility of pollution. Contact Sydney Water on 13 20 90


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 – Cloudy and a medium chance of showers during the morning and afternoon. 

Winds – SE/SW 20 to 30 km/h tending SE in the middle of the day then becoming light in the evening.

Rainfall – 27.5mm in the previous 4 days.

Expected maximum temperature – 17oC

Ocean temperature – 18oC

Swell – Southerly 1 to 1.5 metres inshore, increasing to 1.5 to 2 metres offshore.

High tide – 1.45 metres at 07:44

Low tide – 0.41 metres at 13:36



Report pollution 131 555
Twitter @BeachwatchNSW