This service provides the predicted height and time of the tides at over 380 locations around Australia, Antarctica and the South Pacific. These are labeled as "Tide locations" in the legend.

The predictions are based on the effects of the gravitational forces exerted by the Moon, Sun and the rotation of the Earth and average seasonal changes. The actual tide height will be a combination of these effects and the weather conditions at the time. The effects of the weather are not included in these predictions.

The predictions are for seven days. You can select the start of the seven days up to 2 years ahead.

Important to note that the predictions are in daylight saving time when it is observed.

In addition to "Tide locations" mentioned above, tide predictions are provided for "Supplementary locations". Tide times for these locations, due to availability of very limited time series of sea level observations, are derived via evaluation of the corresponding approximate time differences between tide times at these locations and an appropriate nearby location for which the tide times are known. This method produces results that are variable in quality and therefore tide times for the supplementary locations are usually less reliable (tide heights are not provided).

You can find out more about tide predictions in the following sections.