### What is lunitidal interval?

## What is lunitidal interval?

The lunitidal interval measures the time lag from lunar culmination to the next high tide at a given location. It is also called the high water interval (HWI). Sometimes a term is not used for the time lag, but instead the terms age or establishment of the tide are used for the entry that is in tide tables.

## How do you find your lunitidal interval?

Subtract the moon up time from the high tide time, which gives you the lunitidal interval. For example, if moon up is at 16:05:05, and high tide time is at 16:10:10, the lunitidal interval is 00:05:05, or five minutes and five seconds.

**Does the lunitidal interval change?**

The lunitidal interval changes through the lunar phase cycle. The variation about the mean is approximately +/- 30 minutes.

### How accurate are tide clocks?

During a lunar month (29 days), the tide clock is relatively precise according to the true state of the tide ! However, 12h25mn being the average time between two high tides or low tides, it can happen that some days the tide clock undergoes slight intervals during a tide cycle. come and affect tides.

### How does a high and low tide clock work?

There is one hand on the clock face, and along the left side it points to the number of hours “until” the (lunar) high tide. The right hand side of the clock is marked “hours until low tide” and has a count-down of hours from 5 to 1. The number pointed to by the hand gives the time “until” the (lunar) low tide.

**How long is slack tide?**

about 20 to 30 minutes

The slack portion of the tide, high or low, only lasts for about 20 to 30 minutes.

#### What is the time interval between high and low tide?

Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. It takes six hours and 12.5 minutes for the water at the shore to go from high to low, or from low to high.

#### How do you read a tide clock?

What is lunitidal interval? The lunitidal interval measures the time lag from lunar culmination to the next high tide at a given location. It is also called the high water interval (HWI). Sometimes a term is not used for the time lag, but instead the terms age or establishment of the tide are used for…