Sydney Harbour

Middle Harbour | Nth Harbour | Port Jackson

Lane Cove River | Parramatta River

Wednesday 31 May 2023

Issued at 7:30 AM

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

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For information on beach closures please contact relevant authorities such as local councils.


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 – Partly cloudy. 

Winds – Light.

Rainfall – 0 mm in the previous 4 days.

Expected maximum temperature – 21oC

Ocean temperature – 19oC

Swell – Southerly 1.5 metres, decreasing to around 1 metre during the afternoon.

High tide – 1.61 metres at 17:39

Low tide – 0.56 metres at 11:09



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