What Tide Is It? is a website that provides an array of useful information for anyone who spends time on the water. Not only can you quickly obtain tide charts from one of the several thousand tide stations, but you can also get, information about tide heights and times, sunrise and sunset times, moonrise and moonset times, as well as moon phase details.

To obtain information for any location the user selects the date for the first day of information they want to receive. They then select the number of days they want information for. Finally they enter the address of the location.

The selected location is then displayed on a Google Map with all the tide stations for the location marked in red. The tide, sunrise and moonrise data for the location is displayed next to the map.