Surf Forecast

Here you can find the one week surf forecast for Trigg, Scarborough, Cottesloe, and Rottnest Island. Perth’s surf forecast uses the third generation wave model SWAN to simulate the waves. Two model grids were nested  into a parent grid to minimise computation time while maximising the spatial resolution.

The spatial resolution and extent of the grids is displayed in the image below. The surf forecast uses Global Forecast System (GFS) forecasted wind fields for the following seven days at a spatial resolution of 0.25°. Three-hourly wave data for the boundaries is obtained from NOAA’s Multi-grid wave model: Global 30 arc-min.


The following parameters are simulated and displayed on this website:

Significant wave height (m): measure for the wave height, and closely corresponds to what a trained observer would consider to be the mean wave height. Note that the highest wave height of an individual wave will be significantly larger.

Wave direction (°): parameter defined as the mean direction in the frequency bin corresponding to mean period Tm.

Wave mean period (s): Tm (in seconds) is a period (the time between waves) associated with the locally generated wind sea (in cases with strong local winds) or the dominant wave system (swell) that is generated elsewhere. surf forecast and wave model domain
Domain of the wave model. The three different grids were chosen to reduce computing costs while maximising the spatial resolution of the surf forecast.

We have high resolution surf forecasts for the following locations: