Tidal Products

Australian National Tide Tables (ANTT)

The ANTT contains information for over 600 ports in Australia, Papua New Guinea, Solomon Islands, Antarctica and Timor-Leste. This information includes but not limited to:

  • Predictions for high and low water for each day of the year for over 80 Standard Ports.
  • Predictions of maximum rates of tidal streams for Torres Strait and Port Phillip Heads.
  • Tidal stream diagrams for Sydney, Broome and Darwin.
  • Tidal levels and time difference for all Secondary Ports in relation to the relevant Standard Port.

The main 22 harmonic constituents for all Standard and Secondary Ports are available on request through our licensing process.

Further information can be found on the ANTT page.


AusTides is an official electronic product that is equivalent to the ANTT. It has the benefit of producing a graphical representation of the tidal curve and predictions at 1, 20 30 and 60 minute intervals for each location represented in ANTT. AusTides is released annually in October and provides tidal predictions for the following calendar year. As required, update patches are available from the AusTides Updates section of the AHO website.

For information on the AusTides product please see our AusTides section.


The Australian Tides Manual (SP 9) has been produced by the Permanent Committee for Tides and Mean Sea Level. It can be viewed and downloaded from: http://www.icsm.gov.au/publications/australian-tides-manual-v50

Future Publications

Other products are being planned include Australian Tidal Stream Atlas. The Tidal Stream Atlas will contain detailed information on the rates and directions of tidal streams in many locations around Australia where these data are of importance to navigation.

For Further Information on Tides contact:
Manager of Tidal and Geodetic Element (MTG)
email: tides.support@defence.gov.au