Nearby Harbors
41.5865’ N, 71.2919’ W

Portsmouth, Melville, RI

63°
H -°
L 54°
NE
12mph
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 5h 05m 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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East Passage 24. Photo by Tyler Fields Photography

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Portsmouth, Melville, RI Tides - Nov 1960

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue5:554.86:174.411:520.111:340.06:174:40Full Moon1Tue
2Wed6:424.97:034.412:290.16:184:38Full Moon2Wed
3Thu7:264.97:474.312:070.01:050.06:194:37Full Moon3Thu
4Fri8:084.78:294.112:440.01:410.16:214:36Full Moon4Fri
5Sat8:504.59:123.91:230.02:180.26:224:35Waning Gibbous5Sat
6Sun9:304.29:553.72:030.12:550.36:234:34Waning Gibbous6Sun
7Mon10:123.910:403.42:440.23:330.46:244:33Waning Gibbous7Mon
8Tue10:553.611:273.23:260.44:140.66:254:32Waning Gibbous8Tue
9Wed11:393.44:100.65:000.86:274:31Third Quarter9Wed
10Thu12:143.112:253.25:000.85:590.96:284:30Third Quarter10Thu
11Fri1:023.11:113.16:021.07:140.96:294:29Third Quarter11Fri
12Sat1:493.11:583.17:171.08:170.86:304:28Third Quarter12Sat
13Sun2:403.22:513.18:310.89:040.66:314:27Waning Crescent13Sun
14Mon3:333.43:493.39:290.69:440.36:334:26Waning Crescent14Mon
15Tue4:263.84:443.510:180.310:220.06:344:25Waning Crescent15Tue
16Wed5:164.15:353.811:020.011:01-0.26:354:24Waning Crescent16Wed
17Thu6:024.56:234.011:46-0.311:42-0.56:364:23New Moon17Thu
18Fri6:494.87:114.212:32-0.46:384:22New Moon18Fri
19Sat7:365.08:004.312:26-0.61:19-0.56:394:22New Moon19Sat
20Sun8:255.18:514.41:12-0.62:08-0.56:404:21Waxing Crescent20Sun
21Mon9:165.09:444.32:01-0.62:56-0.46:414:20Waxing Crescent21Mon
22Tue10:104.910:414.22:51-0.43:45-0.26:424:20Waxing Crescent22Tue
23Wed11:084.611:404.13:42-0.24:390.06:434:19Waxing Crescent23Wed
24Thu12:074.44:390.25:490.26:454:19First Quarter24Thu
25Fri12:404.11:074.25:550.57:310.36:464:18First Quarter25Fri
26Sat1:404.12:064.08:110.68:410.36:474:18First Quarter26Sat
27Sun2:424.13:083.89:270.59:300.36:484:17Waxing Gibbous27Sun
28Mon3:444.24:103.810:220.410:060.26:494:17Waxing Gibbous28Mon
29Tue4:434.35:063.811:070.310:340.26:504:16Waxing Gibbous29Tue
30Wed5:364.45:573.911:440.211:040.16:514:16Waxing Gibbous30Wed
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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