The team at ORCAS have been hard at work developing what we hope will be the latest and greatest in marine and surf forecasting for Aotearoa-New Zealand! Have a look at: https://rippleforecast.com/
What makes this forecast different?
Conventional wave models are great at predicting large-scale swell patterns, but they often fall short when it comes to the dynamic, complex environment of the nearshore where most of us actually interact with the ocean.
Our forecast takes a different approach, built from the ground up with coastal users in mind. Here’s why this model provides a more accurate and meaningful view of local wave conditions.
Built for the Coastline, Not Just the Open Ocean
Most global models use grids that span tens or even hundreds of kilometers between points. This might work offshore, but coastal wave behavior is far more localized—affected by headlands, bays and islands.
Our model resolves wave behaviour down to a much finer scale, incorporating:
- Detailed shoreline geometry
- High-resolution bathymetric data — seabed contours that affect wave shoaling, refraction, and breaking.
- Provides a free 16-day forecast of waves throughout New Zealand.
Here’s an example of how our forecast is different.
Our forecast on the left shows the complex wave shadowing behind Great Barrier Island and even behind smaller islands such as Kauau Island where as in the global model (right), the waves pass directly through these islands due to low model resolution.
You can see this in the image below which compares our model resolution (left) with global model resolution (right).

The Bottom Line
Our forecast doesn’t just tell you what’s happening far out to sea—it brings the ocean closer to the coast, where every headland and swell angle matters. If you’re someone who lives by the water, works on it, or plays in it, you’ll feel the difference.
This is Just the Beginning…
This forecast is just the start. Over the coming year we will be bringing out lots more upgrades and extra features to our forecast, so keep an eye on the site for new releases.