Overview
Australian National Tide Tables (ANTT) contains information for over 90 Primary (Standard) and 700 Secondary ports in Australia, Papua New Guinea, Solomon Islands, Antarctica and Timor-Leste. This information includes:
- Predictions for high and low water for each day of the year for all Standard Ports.
- Tidal level and time differences for all Secondary Ports.
- Instructions and forms for calculating intermediate times and heights.
- Effects of wind and barometric pressure on tide, particularly at certain ports.
- Details of transmitting tide gauges in Torres Strait.
- Predictions of maximum rates of tidal streams for Torres Strait and Port Phillip Heads.
- Tidal Stream diagrams for Sydney, Broome and Darwin.
Updates to the ANTT are published via Australian Notices to Mariners.
Web Service
The ANTT tidal information is also available as an interactive web service. This platform provides an enhanced user experience, giving access to tidal information in an intuitive and functional way. It utilises a searchable map allowing specific port discovery with the ability to view and download individual port tidal data.
Official nautical publication
The ANTT PDF is an official nautical publication and complies with Australian carriage requirements. Official nautical publications are those issued by, or on the authority of, a Government authorised Hydrographic Office or other relevant government institution. The Australian Hydrographic Office (AHO) is Australia’s national charting authority and publishes official nautical publications of the Australian Charting Area.
For details about carriage requirements of nautical products in Australian waters for SOLAS and NSCV regulated vessels, visit the Australian Maritime Safety Authority (AMSA) website and refer to Marine Orders and Marine Notices.
If you require more information, or would like to provide feedback, email aho.communications@defence.gov.au.
Additional information
- While short term predictions for Australian Standard Ports are also available from the Australian Bureau of Meteorology (BoM), it should be noted that these predictions do not take into account differences between chart and tidal datums. Predictions for Secondary Ports are not available through the BoM website.
- For more information on vertical datums refer to section 12.9 in The Mariner's Handbook for Australian Waters.
- The main 22 harmonic constituents for all Standard and Secondary Ports are found within the AusTides application.