TideAhead Coastal Guides

Make Better Sense Of Coastal Data

A tide number is useful only when you know its station, datum, time, and source. These guides explain the decisions behind TideAhead and show how to turn official data into a more careful planning workflow.

Start With A Guide

How To Read A Tide Chart

Understand height, datum, timing, high and low events, continuous prediction curves, and the limits of a chart.

8 min readRead Guide

How To Choose A Tide Station

Learn why the closest station is a starting point—not proof that two shorelines experience the same tide.

7 min readRead Guide

Observations, Models, And Unavailable Data

See how sensor observations, official models, derived values, freshness checks, and unavailable states differ.

9 min readRead Guide

What These Guides Add

Official agencies publish the authoritative predictions, observations, models, and warnings. TideAhead does not rewrite those products as if they were ours. We add a consistent reading framework: source identity, freshness, station distance, field provenance, and explicit limits.

The goal is not to turn a forecast into certainty. It is to help a person notice whether a value is observed or modeled, whether a tide belongs to the selected place or a nearby station, and when an unavailable field should change the plan.

How TideAhead Is Built

The methodology page documents provider selection, validation, freshness rules, tide interpolation, distance calculations, activity-analysis boundaries, and our corrections process.

Read The Methodology