Sydney 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.

Important information

These maps have been developed to help communicate the risks of sea level rise. The maps are not provided as professional advice, and should not be relied upon for site-specific decision-making or for making financial or any other commitments.

While every effort has been made to ensure the accuracy and correctness of materials presented, the Australian Government makes no expressed or implied warranties (including warranties of merchantability and fitness) with respect to the accuracy, completeness, character, function, or capabilities of the maps. Appropriate use and conclusions drawn from the maps are the responsibility of the user.

What do these maps show?

These maps show low-lying areas that are potentially vulnerable to flooding from a combination of sea level rise and a very high tide for three sea level rise scenarios.

Are more detailed studies required?

The maps are not a substitute for more detailed studies. There are local factors such as whether the coast is soft and vulnerable to erosion, existing protective structures such as sea walls, and catchment flooding risks from heavy rainfall events, which also need to be taken into account in decision-making.

If you have questions about coastal climate change please contact: coastal.adaptation@climatechange.gov.au

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