The chart doesn’t know the wind.
Tide stations predict astronomy. Wind decides where the water actually is. TrueTide corrects the chart with live wind and tells you the real window — plainly.
February 23, Charlotte Harbor. North wind built all day. The chart called +1.4 feet for 4pm — the water showed up at +0.4. If you ran a flat that afternoon trusting the chart, you know exactly how that story ends. The chart is a prediction. The water is the truth.
Three steps. No mystery.
Start with the station
We pull the same NOAA harmonic prediction your chart app shows. That’s the moon’s opinion.
Correct with the wind
Live wind speed, direction, and fetch over your water — plus pressure — move the curve to where the water actually sits.
Give you the window
A plain answer: real high, real low, and the window worth fishing. With a confidence band when the weather’s messy.
Built for the backcountry, not the marina.
Chart, corrected, observed — one picture
The station prediction, the wind-corrected curve, and live gauge readings on the same axes, with a confidence band. You see exactly where the chart went wrong, as it happens.
Know when the creek starts moving
Get pinged when your water starts dumping or filling — the corrected timing, not the chart’s guess. The bite window comes to you.
Will it float the skiff?
Corrected depth checked against your route before you commit to a creek. Where the bottom is unresolved — tannic water, unmapped bars — it says HOLD instead of guessing.
Catches stamped with conditions
Log a catch and the tide, wind, and water state are recorded automatically. Track personal bests and chase the Inshore, Backcountry, and Florida Grand Slams.
A captain who’s seen your water before.
Finn reads the corrected tide, the wind, and your spot — then talks to you like a guide, not a forecast. Ask him if it’s worth the gas money. He’ll tell you straight, including when the answer is stay home.
Meet Finn →We keep score against the chart.
mean error vs. the raw station prediction, last 30 days
average shift in true high vs. the chart on windy days
of corrected windows verified against gauge readings
A month of honest water, free.
Then Finn comes aboard.
Free for 30 days — one full moon, every tide the month can throw. TrueTide + Finn is $9.99/month, and one saved trip pays for the whole year.