About Tide Day

Radif Partners publishes Tide Day from the tide predictions of the National Ocean Service, the federal office that runs the US network of tide stations: every high and low on these pages is the official prediction for a named station, redrawn as a curve you can read on a phone, next to the sun, the moon and the solunar periods that anglers plan around. The site sells no charter, no bait and no gear, and asks for nothing before it shows the tide.

Why this site exists

Search "tide chart" with the name of a beach and the results are often a page of times with no curve, built in the 1990s, or a forecast site that covers the whole world and nothing about fishing or planning a walk. Tide Day does better than the first Google result because it puts NOAA's own predictions for 92 named US stations on one screen you can read on a phone: the curve for today and seven days, the next high or low with a countdown, the tide coefficient, sunrise and sunset, the moon and the solunar periods, and a planner that answers "when can I walk the beach or launch the boat" for the next weeks.

Who publishes it

The site is published by Radif Partners, a company that builds free calculators and reference pages on public data. It is not affiliated with NOAA or any government agency, does not sell charters, gear or rentals, and carries no advertising today.

Radif Partners
49 rue du Ressort
63000 Clermont-Ferrand, France
contact@usatidechart.com

What we use

NOAA's predicted highs and lows for every station, NOAA's hourly predictions for the 77 reference stations among them, NOAA's datums and subordinate-station corrections, all downloaded on October 13, 2026 for October 1, 2026 to December 31, 2027. Sun and moon times come from Astronomy Engine, an open-source library, checked against NOAA's solar formula and the 2026 eclipses. Nothing is estimated from another tide website.

How it is checked

The tide curve is tested against NOAA's six-minute predictions, the windows of the planner against minute-by-minute sampling, and the times on daylight-saving days against the clock rules of each zone. The results and the limits are on the method page; how corrections work is in the editorial policy.

Contact

Questions and corrections: contact@usatidechart.com, or the contact page.

Predictions, not measurements: the times and heights are NOAA’s astronomical tide for the station named on the page. An onshore wind, a storm surge or a river in flood can raise the water well above them, and an offshore wind can hold it down. Never use this page to navigate.

Tide predictions 2026, downloaded from the National Ocean Service on October 13, 2026