Melbourne region

Maps have been prepared for three sea-level rise scenarios of 0.5m, 0.8m and 1.1m,relevant for the 2100 period.

You may notice that some of the areas highlighted as low lying and vulnerable are the same ones that are already prone to flooding in big storms. However, it is important to remember that the maps show flooding that may occur annually, or in some areas more frequently, around the turn of the century. The big storms of 2100 are likely to flood an even larger area.

The sea-level rise scenarios have been combined with a nominal highest astronomical tide (HAT) value for the region, and are based on IPCC projections and more recent science.

The maps are based on a simple 'bucket fill' approach and should be considered as approximate only. The actual impacts may vary as this model does not take account of existing sea walls, storm surge, erosion or other local factors.

For more information go to frequently asked questions

Note: These maps are a communication tool only and are not suitable for decision-making.

Select a region by clicking on a box below.


Tide values

A value for a Highest Astronomical Tide (HAT) was used to model the very high tide. The values used for the Melbourne region are:

Port Phillip Bay – 0.5m
Open coast area – 0.9m
Western Port Bay – 1.5m

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