The online tide clock displays the current tide for Mandurah as supplied by the Bureau of Meteorology using methods of interpolation and offsets provided by the Australian National Tide Tables. Actual tide clocks such as those available through the store on this website are not accurate enough for scientific purposes as they do not take into account the gravitational effects of the sun, or changes in atmospheric pressure which may alter the state of the tides. Please note that in some areas, the gravitational effects of the sun are similar in magnitude to that of the moon.