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Tide time calculator (rough estimate)
Estimate the high and low tide times for a port from the moon and the port's high water interval.
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- Works on any device
About Tide time calculator (rough estimate)
This gives a rough estimate of high and low tides using the moon's position and a port's high water interval, the average delay between the moon crossing and high water. Tides come about every 12 hours 25 minutes. Use an official tide table for navigation or safety.
How to use Tide time calculator (rough estimate)
- Pick the date you want tide times for.
- Enter the high water interval of your port.
- Read the estimated high and low tide times.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
Why do tide times change every day?
The moon rises about 50 minutes later each day, and tides follow it. So high tide arrives roughly 50 minutes later than the day before.
Where do I find my port's high water interval?
Look in a nautical almanac or a harbour guide for the port, where it is often listed as the high water interval or establishment of the port. Local tide tables give it too.
Can I rely on this for sailing or fishing?
No. It is a rough estimate based on the moon, and weather, pressure and local geography change real tides. Always use official local tide tables when safety depends on it.
Is Tide time calculator (rough estimate) free?
Yes. Tide time calculator (rough estimate) on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.
Can I put Tide time calculator (rough estimate) on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.