Flood and coastal hazard maps

Flood maps

The regional council is producing flood maps for the 28 Northland catchments identified as having the highest level of potential flood risk, as part of the Priority Rivers Project.

The flood maps show the likely extent of river flooding during a 10-year or 100-year flood event. A 10-year flood area has a 10% chance of flooding annually, whilst the more extensive 100-year flood area has a 1% chance of flooding annually.

Open the Flood and Coastal Hazards (Natural Hazards) maps

What if I disagree with the maps?

If you believe that a particular location on a map is not at risk of flooding, or you have information that you think may not have been taken into account, get in touch with the regional council's rivers team on 0800 002 004.


The maps have been compiled using an assessment of best available information, and should give a good indication of the areas at risk of flooding.

However, flood mapping is a complex process which involves some approximation of the natural features and processes associated with flooding. Before using the flood maps, please ensure that you understand the disclaimer.

Flood maps disclaimer (PDF, 228 KB)

Flood maps and the Building Act 

Under the Building Act, district councils will take into account the flood maps when making decisions on building consents. For queries on this please contact your district council:

  • Far North District Council – 0800 920 029 or 09 401 5200
  • Kaipara District Council – 0800 727 059 or 09 439 3123
  • Whangarei District Council – 0800 932 463 or 09 430 4200

Coastal hazard maps

The coastal hazard map identifies the hazard zones and the level of risk to coastal areas due to storm events, taking into account current and future sea level rise over the next 50 and 100 years.

The map is designed to raise awareness of where coastal hazard areas are and inform decision-making, to help minimise the impacts of coastal hazards in our region - and to looks at erosion zones and potential erosion levels over the next 50 and 100 years.

Currently, the maps do not cover the entire Northland coastline but are limited to a number of selected sites where survey information is available. The coastal hazard maps will be extended as significant new information becomes available.

A region-wide aerial LIDAR (light detection and ranging) survey will enable the council to update existing mapping and also extend the mapping to other areas is underway and is scheduled to be completed by the end of 2020. This will allow council to update existing mapping and to extend the mapping to other areas.

View the maps online

The maps are available for viewing on our GIS website. We recommend using Firefox or Google Chrome to view these online maps.

Quick Start Guide

The Flood Maps and Coastal Hazard Maps are all available on the 'Natural Hazards' map online. You'll just need to change the layers to see each one. If you're not sure what to do, then use our quick start guide to help you find your way around. 

Quick Start Guide for the Natural Hazard Maps (PDF, 1.4MB)

Open the Flood and Coastal Hazards (Natural Hazards) maps

Screenshot of the layers on the natural hazard maps.Use the 'layers icon' to select which maps you'd like to have displayed.

Assessment and site reports

Assessment and site reports for the coastal erosion and flood zones.

Need further assistance?

If you need help understanding these maps, contact a member of our Natural Hazards Team on: Freephone 0800 002 004.