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TOC > MSC data > GDWPS

Data and Products of the Global Deterministic Wave Prediction System (GDWPS)

The Global Deterministic Wave Prediction System (GDWPS) produces wave forecasts using the third generation spectral wave model WaveWatch III® (WW3). The model is forced by the 10 meters winds from the Global Deterministic Prediction System (GDPS). The GDPS forecast is a coupled atmosphere-ice-ocean model, its sea ice forecast is used by the GDWPS forecast to dampen or suppress wave growth in areas covered respectively with 25% to 75% and more than 75% ice.

WW3 (WAVEWATCH III® Development Group, WW3DG 2019) is a third generation spectral wave prediction model that solves the evolution of the energy balance equation for the 2-D wave energy spectrum without any prior assumptions on the shape of the spectrum. The WW3 model has been implemented by a growing number of national operational forecasting centres over the last several years.


How to access the data

This data are available on the data server services MSC Datamart and the web services MSC GeoMet respectively :

An overview and examples to access and use the Meteorological Service of Canada's open data is available.


The end-user licence for Environment and Climate Change Canada's data servers specifies the conditions of use of this data.

MSC Open Data Service Usage Policy

The MSC Open Data Service Usage Policy determines what constitutes an acceptable use of MSC Open Data services and provides users best practices for optimal use.




List and links to the products available for this dataset :

Forecast maps

Technical documentation


The chronology of changes to the Global Deterministic Wave Prediction System (GDWPS) is available here.