Sydney Harbour

Middle Harbour | Nth Harbour | Port Jackson

Lane Cove River | Parramatta River

Tuesday 21 March 2023

Issued at 7:15 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.


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. Slight chance of a shower. 

Winds – SE 15 to 25 km/h tending E 15 to 20 km/h in the middle of the day then becoming light in the evening.

Rainfall – 2.5mm in the previous 4 days.

Expected maximum temperature – 24oC

Ocean temperature – 23oC

Swell – Southerly 2 to 2.5 metres.

High tide – 1.94 metres at 08:51

Low tide – 0.21 metres at 15:19



Report pollution 131 555
Twitter @BeachwatchNSW