Coasts

NIWA research and tools support the protection, restoration and management of coastal estuarine environments where seawater mixes with freshwater.

Transforming coastal lowland systems threatened by sea-level rise into prosperous communities

Consequences, threats, and opportunities from sea-level rise

Long hot days, sand between your toes, and jellyfish – all part of the New Zealand beach summer.

Storm-tide red-alert days 2024

Reducing the risk of new freshwater invasive species, minimising the impacts of these species, and developing methods for reducing or eradicating those populations.

A web-based taxonomic resource tool has been developed to improve the accuracy and consistency in soft sediment estuarine and coastal benthic intertidal and shallow subtidal macroinvertebrate identification across New Zealand.

On this page, you can find information about tide forecasts, sea-level network, tidal model of New Zealand's EEZ, and red-alert days for coastal flooding.

NIWA's Tide forecaster provides tidal data for any point in New Zealand.

NIWA posters, as well as bathymetry, sediment, and circulation charts. 

Cam-Era is a network of computer-controlled cameras that monitor the New Zealand environment for research and resource management. These are also useful for surfers and swimmers.

Online decision-support web mapping tools for informing the management of cumulative effects in the coastal and marine environment.