How To Determine Slack Tide

Slack tide refers to the phase when there’s minimal movement in the water’s level within a water body. This phase happens daily, both at high and low tide intervals. Identifying slack tide is crucial for various pursuits like fishing or navigating a boat.

Method 1: Use a Tide Table

One way to determine slack tide is by using a tide table. A tide table is a chart that shows the predicted times and heights of high and low tides for a specific location over a period of time. To use a tide table, find the location closest to where you will be and look up the predicted times for high and low tide. The slack tide occurs halfway between these two times.

Method 2: Observe the Water Level

Another way to determine slack tide is by observing the water level. Look for a period of time when the water level remains relatively still and there is no visible movement in either direction. This is likely to be during slack tide. However, it can be difficult to determine slack tide using this method if you are not familiar with the area or the specific body of water.

Method 3: Use a Tide Clock

A tide clock is a device that displays the current time and also shows the predicted times for high and low tide. To use a tide clock, set it to the correct location and time zone. The clock will display the predicted times for high and low tide, as well as the current time. By observing the clock, you can determine when slack tide occurs.


Determining slack tide is important for activities such as fishing or boating. There are several methods to determine slack tide, including using a tide table, observing the water level, and using a tide clock. By using one of these methods, you can ensure that you have the best possible conditions for your activity.