FAQ

What is a tide clock and how does it work?

A tide clock is a special type of clock that tracks the 12 hour 25 minute lunar cycle, which controls the rise and fall of the tides. Instead of showing the time of day, it shows whether the tide is rising or falling and when the next high or low tide will occur.

Where are tide clocks most effective?

Tide clocks work best in areas with semi-diurnal tides—two high tides and two low tides of roughly equal size each day. This includes most of the East Coast of the United States, the Caribbean, and many parts of Western Europe. Tide clocks are not as accurate in areas with mixed or irregular tides, such as the Gulf of Mexico and much of the U.S. West Coast.

Can I use a tide clock anywhere?

Not everywhere. Tide clocks are designed for predictable tide cycles. In places where tides are irregular or strongly influenced by local geography, weather, or currents, a tide clock may not stay accurate.

How do I set my tide clock?

Setting your tide clock only involves a few simple steps:

1. Identify the next high tide in your area. You can find this information through online tools like the NOAA Tide Predictions tool or Tides Near Me app.
2. Locate the round adjustment knob, found on the back of the movement.
3. Turn the adjustment knob to set the tide hand to the high tide position during the next high tide in your area.

It’s generally best to set the tide hand at high tide during a full or new moon. If this isn’t possible, check the reading of the tide hand at the next full or new moon and adjust as necessary.

Why is my tide clock not accurate?

If your tide clock does not indicate high tide at the next full or new moon after setting it, you may need to adjust it using the wheel on the back of the movement. Keep in mind that semi-diurnal tide clocks may require weekly adjustments for optimum results due to the complex nature of tides and their influencing factors.

Do tide clocks need to be reset?

Yes. Because the tidal cycle does not fit perfectly into a 24-hour day, tide clocks can lose a few minutes each week. Most people reset their tide clock once or twice a month to maintain accuracy.

Are tide clocks the same as moon phase clocks?

No. A tide clock tracks the lunar tidal cycle (12 hours 25 minutes), while a moon phase clock tracks the 29.5-day lunar cycle that shows the changing shape of the moon. Both are connected to the moon but serve different purposes.

Do tide clocks need batteries?

Yes. Our tide clocks run on a single AA battery. A fresh battery typically lasts 12 months or longer, depending on the brand and movement.

What’s the difference between a tide clock and a regular clock?

A regular clock tracks the 24-hour solar day. A tide clock tracks the 12 hour 25 minute lunar tidal cycle. Together, they complement each other—one keeps you on schedule, and the other keeps you in sync with the sea.