About TideCurve

TideCurve turns NOAA's tide predictions into pages that show their own working: the station, the datum, the time zone rule and the moment the numbers were fetched, next to a curve you can read in a second.

Why it exists

There is no shortage of tide tables online. What is scarce is a tide page that tells you which station its numbers came from, what datum they are referenced to, and whether the time on screen has daylight saving in it. Those three facts decide whether a tide table is useful or quietly wrong, and they are missing from most pages that rank. Everything here is built around putting them in front of you.

Who writes it

The TideCurve team. TideCurve is built and maintained by a small independent team. We compile tide predictions published by NOAA CO-OPS, show the source and retrieval date for every figure, and publish the assumptions behind any calculation on the methodology page. We are not affiliated with, and not endorsed by, any of the organisations whose published data appears here.

How it is paid for

The plan is display advertising first. If affiliate links are added later they will be disclosed on the pages that carry them. No source of revenue changes which station a prediction comes from or what the tables say.

What it will not do

TideCurve does not tell you when fishing is good, when a beach is safe, when a bar is crossable or how much water is under a keel. Predicted tide heights cannot answer those questions: they are astronomical predictions that exclude wind, air pressure and runoff. For conditions on the day, read the marine forecast and the observed water level. The methodology page lists every source and every assumption, including the one approximation used to draw the curves.

Corrections

If a number here does not match NOAA for the station and datum named on the page, that is a defect and worth reporting. Each page prints the request used to produce it, so a disagreement can be checked in one click.

Browse the stations or read the guides.