Tides

Tide predictions for thousands of stations worldwide, powered by open source software and open data.

Tide Predictions

Explore tide predictions from stations near you or search by location.

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Developer API

Access tide predictions programmatically through a REST API.

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Neaps Engine

Learn about the open source tide prediction engine that powers our predictions.

About Neaps

Tide Database

Access our comprehensive database of harmonic constituents and station metadata.

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Understanding Tide Predictions

Tide predictions are calculated using harmonic analysis, a method that breaks down the complex tidal signal into a series of simple wave components called harmonic constituents. Each constituent represents the effect of a specific astronomical or oceanographic force on the tides.

Learn more about harmonic constituents

Start Exploring Tides

Find tide predictions for your favorite locations or integrate our API into your application.

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