Nearby Harbors
41.5865’ N, 71.2919’ W

Portsmouth, Melville, RI

55°
H -°
L 54°
NE
4mph
Low tide
11:06 pm
Photo Credits

Tides Today & Tomorrow in Portsmouth, Melville, RI

TIDE TIMES for Monday, September 21, 2026
The tide is currently falling in Portsmouth, Melville, RI.
Next low tide : in 2h 21m at 11:06 pm (0.9 ft)
Next high tide (tomorrow) : 5:18 am (3.2 ft)
Sunset today : 6:44 pm
Sunrise tomorrow : 6:31 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8452555
Common Questions About Tides

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Portsmouth, Melville, RI Tides - Aug 2094

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun12:054.712:384.85:29-0.16:100.45:408:02Third Quarter1Sun
2Mon1:014.31:344.66:160.27:460.65:418:01Third Quarter2Mon
3Tue1:574.02:314.57:090.49:210.85:428:00Third Quarter3Tue
4Wed2:533.73:304.38:110.610:290.85:437:59Third Quarter4Wed
5Thu3:533.54:334.29:140.711:240.85:447:57Waning Crescent5Thu
6Fri4:573.45:364.110:120.75:457:56Waning Crescent6Fri
7Sat5:573.56:314.112:080.711:01 AM0.75:467:55Waning Crescent7Sat
8Sun6:493.67:194.212:450.711:46 AM0.65:477:53Waning Crescent8Sun
9Mon7:353.78:004.21:160.612:290.55:487:52New Moon9Mon
10Tue8:183.88:394.21:460.51:130.45:497:51New Moon10Tue
11Wed8:573.99:144.12:180.41:580.35:507:50New Moon11Wed
12Thu9:353.99:484.02:510.32:420.35:517:48New Moon12Thu
13Fri10:113.910:223.93:230.33:240.35:527:47Waxing Crescent13Fri
14Sat10:483.810:563.73:540.34:030.45:537:45Waxing Crescent14Sat
15Sun11:253.711:343.54:230.34:410.55:547:44Waxing Crescent15Sun
16Mon12:043.74:540.45:200.75:557:42Waxing Crescent16Mon
17Tue12:163.412:473.75:270.56:040.85:567:41First Quarter17Tue
18Wed1:023.21:323.76:070.67:000.95:577:40First Quarter18Wed
19Thu1:523.22:223.86:570.68:121.05:587:38First Quarter19Thu
20Fri2:473.23:193.98:000.69:330.85:597:37First Quarter20Fri
21Sat3:483.34:244.19:090.510:420.66:007:35Waxing Gibbous21Sat
22Sun4:563.55:304.410:170.311:370.36:027:33Waxing Gibbous22Sun
23Mon6:003.86:314.711:200.06:037:32Waxing Gibbous23Mon
24Tue6:584.37:265.112:270.012:17-0.26:047:30Full Moon24Tue
25Wed7:514.78:185.31:15-0.21:14-0.46:057:29Full Moon25Wed
26Thu8:435.09:085.32:03-0.42:11-0.56:067:27Full Moon26Thu
27Fri9:345.29:595.22:49-0.53:07-0.56:077:26Waning Gibbous27Fri
28Sat10:255.210:504.93:33-0.54:01-0.36:087:24Waning Gibbous28Sat
29Sun11:185.111:424.64:13-0.34:530.06:097:22Waning Gibbous29Sun
30Mon12:134.94:54-0.15:490.46:107:21Waning Gibbous30Mon
31Tue12:374.21:094.65:370.27:110.76:117:19Third Quarter31Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8452555)

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Common Questions About Portsmouth, Melville, RI Tides

Collapse All
Is this week a spring tide or neap tide in Portsmouth, Melville, RI?

Portsmouth, Melville, RI is currently in a transitional phase. Tonight's moon is 75% illuminated. Spring tides (largest swings) occur near new and full moons; neap tides (smallest swings) occur near first and third quarter moons. Tidal ranges this week are shifting between spring and neap.

What datum are Portsmouth, Melville, RI tide heights measured from?

Tide heights on this page are measured from Mean Lower Low Water (MLLW), the U.S. NOAA standard. A height of 0 ft represents the 19-year average of each day's lower low tide. Negative values indicate a "minus tide" — water levels below that long-term reference.

What factors can affect the tide predictions for Portsmouth, Melville, RI?

Tide predictions for Portsmouth, Melville, RI come from NOAA's harmonic analysis and are typically accurate within about ±10 minutes on timing and ±0.5 ft on height. Actual water levels can deviate further due to sustained winds, atmospheric pressure changes, river flow, and storm surge. During major weather events, be sure to check US Harbors weather pages for factors that could impact tidal predictions.

Which NOAA station provides tide data for Portsmouth, Melville, RI?

Tide data for Portsmouth, Melville, RI is sourced from NOAA Station #8452555. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8452555.

What is the moon phase in Portsmouth, Melville, RI tonight?

Tonight the moon over Portsmouth, Melville, RI is Waxing Gibbous (75% illuminated). This places Portsmouth, Melville, RI in a transitional tide cycle, so tidal ranges are shifting between spring and neap this week.

US Harbors Tidal Data

The data in our tide charts, tide tables, and tide graphs is provided by NOAA and others. These predictions are derived mathematically from numerous inputs, including data from historical tide stations and nearby locations where sensors are actively recording. As shown in the tide graph at the top of this page, “Predicted” tides (blue) are what forecasting models expect to happen. “Observed” tides (red) are those recorded by local sensors in real time, overlaid on the predictions for direct comparison. We display Observed water levels for a select group of harbors including Portland, Maine, where a physical sensor monitors water levels in real time.

LEARN MORE ABOUT OUR TIDE DATA

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