In coastal areas, astronomical tides are often the main driver of sea level variability and thus contribute to both high and low water extremes along with other processes such as storm surges and waves, interannual and interdecadal variability and sea level rise. Change in tide amplitude can impact the growth of marine vegetation, spawning habitats, and can participate in coral exposure. Hence, harmonic tide predictions are an essential factor in the development of any robust sea level prediction. However, the accuracy and utility of tide prediction depends on a range of subjective choices. For example, the choice of whether to perform the tidal analysis year-on-year or over a long multi-decadal period changes the resulting tidal prediction by including/excluding various components. Tidal analyses with longer time period allow to define long tidal cycles and separate closely located constituents which cannot be fully captured by the year-on-year analyses. Here we compare tidal analyses performed using these 2 different methods across the Australian tide gauge network. The year-on-year tidal analysis captures variations in constituent amplitude due to, for example, sedimentation/erosion, sea level rise changes and basin size, allowing to track constituent change over years, in contrast with the long-term tidal analysis.