Global tide predictions for applications that need dependable marine data.
WorldTides provides tide heights, extremes, datums, station metadata, time zones, and forecast graphics through a developer-friendly web service.
Worldwide coverage
WorldTides combines station observations and harmonic constituents to support tide predictions across coastlines, islands, bays, and open-water locations.
Developer focused
The API is designed for applications that need structured responses, predictable credit usage, and clear vertical datum handling.
Operated by Brainware
WorldTides is offered by Brainware LLC, with support for commercial and independent developers.
How predictions are produced
Tide prediction starts with known astronomical forcing and local water-level behavior. WorldTides uses harmonic constituents and station data where available, then returns the result through a consistent API surface.
For a deeper explanation of the prediction process, see How Tide Predictions Work.
Using the data
Developers can request tide predictions directly from the WorldTides API and integrate them into websites, marine tools, mobile apps, logistics systems, and research workflows.
Legal information
Please review the Terms of Service and Copyright pages for licensing, acceptable use, and attribution details.
