Environmental Protection Agency Narragansett Bay Commission University of Rhode Island Office of Marine Programs

Estuarine Science

Tides

1. What are tides?
2. How do we measure the tides?
3. What are the tides in Narragansett Bay?
4. What can we learn by measuring tides?


3. What are the tides in Narragansett Bay?

Tides in Narragansett Bay are semidiurnal, meaning that there are two high tides and two low tides each day. The tidal range, height difference between high and low tide, in Narragansett Bay is around 4 feet. Here are some examples of the tides in Narragansett Bay.

Newport Tides, November 3, 2001

Providence Tides for the Same Day

The tidal range changes with time as explained in the "What are tides" page. This figure of the tides at Newport, RI shows how the tidal range can change over a month.


1. What are tides?
2. How do we measure the tides?
3. What are the tides in Narragansett Bay?
4. What can we learn by measuring tides?

       


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