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Rhode Island Tide Charts

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Tide Note

General Tide Note -
On average, the recurrence of a tide of the same phase and similar rise takes place at an interval of 24 hours 50 minutes after the preceding occurrence. (If it's high at 3pm today then it'll be high tomorrow around 4.) This is, however, only a monthly average. The relative positions of the sun, moon and earth at different times during the month can significantly alter this interval and the "expected" times of high and low tides.

Between the new moon and the 1st quarter and between the full moon and 3rd quarter there is an acceleration in tidal arrival times. Between the 1st quarter and the full moon and between the 3rd quarter and the new noon there is a delay.

One of the occasional results can be two AM or PM high or low tides. This is particularly likely to occur in Buzzards Bay and Narraganset Bay because of the unique coastline configuration, water depth, and ocean-floor topography of that area. However, it can occur at any location even along the rocky coast of Maine.

Here are Newport RI tides for May 24-26, 1999. Notice the two AM low tides on the 26th.

Newport tide example

On our tide charts we indicate this AM or PM anomaly with a red asterisk - * - and a note at the bottom of the chart as shown here:

DATE
HIGH
LOW
AM
hgt
PM
hgt
AM
hgt
PM
hgt
rise
set
qtr
24 Mon 4:10 3.3 4:40 3.7 10:37 0.5 11:28 0.5 5:19 8:06
25 Tue 5:03 3.3 5:29 3.8 11:21 0.4 - - 5:18 8:07
26 Wed 5:51 3.3 6:14 3.9 12:14 0.4 11:56* 0.4 5:17 8:08
*AM tide - see note
While we take a lot of care to make these tide charts as accurate as possible, Rhode Island Harbors or Maine Harbors does not warrant the accuracy, completeness, or fitness for a particular purpose of any tide information offered through this service. Under no circumstances shall Rhode Island Harbors or Maine Harbors be liable to you or any other person for any indirect, special, incidental, or consequential damages arising from the use of this service.