AusTides is an official electronic product that is equivalent to paper Australian National Tide Tables (ANTTs). AusTides contains information for over 80 Primary (Standard)1 and 600 Secondary2 ports in Australia, Papua New Guinea, Solomon Islands, Antarctica and Timor-Leste.

Most importantly, the additional functionality within AusTides replaces any requirement to manually calculate intermediate times and heights for port entry and departure.

AusTides includes:

  • Predictions for high and low water for each day of the year for all Standard and Secondary Ports.
  • Interactive tidal curves allowing identification of tidal windows when tides of sufficient height are available.
  • Predictions at each port location presented graphically at 10, 20, 30 and 60 minute intervals.
  • Predictions of maximum rates with graphical curve of tidal streams for Torres Strait and Port Phillip Heads.
  • Tidal Stream diagrams for Sydney, Broome and Darwin.
  • List of the main 22 harmonic constituents for all Standard and Secondary Ports.


It is expected that all commercial vessels operating in Australian waters carry and refer to either AusTides or Australian National Tide Tables. Vessels operating internationally may choose to carry Admiralty Tide Tables or Admiralty TotalTides, but should note that some minor differences in the times of predictions may occur using Admiralty products.


Updated information is included in AusTides as it is received and verified. Periodic Updates should be downloaded from this website on our AusTides Update page.

AusTides users should monitor Australian Notices to Mariners for notification of updates, or subscribe to eNotices.


AusTides are published on CD-ROM and may be purchased from AHO chart distribution agents. They are released annually in October for both the year of release and the full following year, allowing users to replace their current edition immediately upon receipt.

Instructions for installing AusTides, and for applying updates, are available from this website on our AusTides Update page.


AusTides is compatible with Windows XP, Vista, 7, 8, 8.1 and 10 operating systems. It is not compatible with tablet mode.

You will need Administrator permission to enter your AusTides registration code. For more information contact


Try before you buy with the AusTides Demo 2015. This demonstrator version is built on the basis of AusTides 2015 with a reduced dataset. It contains two tidal ports and one tidal stream port for evaluation purposes. Please note that you will need to enter "1111" to register the demo version. Please contact if you have further queries.


    1. A Standard Port (also referred to as a 'primary port') is a place for which independent daily tidal predictions are given in the tidal height or tidal stream tables. Predictions are typically based on observations over several decades.
    2. A Secondary Port is a place for which tidal predictions given the tidal height or tidal stream tables are calculated by applying relevant corrections to the tidal predictions of a standard port. Predications maybe based upon lesser periods of continuous observations.
    3. Predictions in ANTT for times and heights for high and low water are referenced to Lowest Astronomical Tide (LAT), which is chart datum for most large scale ENC and paper nautical charts covering ports. However, chart datum for some ports differs from LAT.
    4. While short term predictions for Australian Standard Ports are also available from the Australian Bureau of Meteorology (BoM), it should be noted that the later do not take into account differences between chart and tidal datums. Predictions for Secondary Ports are not available through the BoM website.
    5. For more information on vertical datums refer to section 13.12 in AHP20 Mariner's Handbook for Australian Waters.