Nearby Harbors
41.5865’ N, 71.2919’ W

Portsmouth, Melville, RI

60°
H 66°
L 55°
NNE
15mph
Low tide
9:59 am
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 4h 03m at 9:59 am (1.0 ft)
Next high tide : 4:55 pm (3.3 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 - Sep 2093

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:373.75:144.69:590.311:290.36:127:17Waxing Gibbous1Tue
2Wed5:444.16:174.811:080.16:137:15Waxing Gibbous2Wed
3Thu6:434.47:135.112:190.112:08-0.16:147:14Waxing Gibbous3Thu
4Fri7:374.88:045.21:04-0.11:04-0.36:157:12Full Moon4Fri
5Sat8:285.08:535.21:49-0.21:59-0.36:167:10Full Moon5Sat
6Sun9:175.29:415.02:30-0.32:52-0.36:177:09Full Moon6Sun
7Mon10:065.110:294.83:09-0.23:40-0.16:187:07Waning Gibbous7Mon
8Tue10:554.911:184.43:46-0.14:240.16:197:05Waning Gibbous8Tue
9Wed11:454.64:220.15:070.56:207:03Waning Gibbous9Wed
10Thu12:084.012:374.35:000.35:540.86:217:02Third Quarter10Thu
11Fri1:003.71:294.05:420.66:561.16:227:00Third Quarter11Fri
12Sat1:523.42:223.76:310.98:441.26:236:58Third Quarter12Sat
13Sun2:453.23:173.57:331.09:561.26:246:57Third Quarter13Sun
14Mon3:423.14:183.48:461.110:441.16:256:55Third Quarter14Mon
15Tue4:423.25:193.49:561.011:230.96:266:53Waning Crescent15Tue
16Wed5:393.36:083.610:530.811:570.76:276:51Waning Crescent16Wed
17Thu6:263.56:483.711:400.66:286:50Waning Crescent17Thu
18Fri7:063.87:233.912:310.512:240.46:296:48Waning Crescent18Fri
19Sat7:434.07:574.11:030.31:050.26:306:46New Moon19Sat
20Sun8:194.28:334.21:360.11:460.16:316:44New Moon20Sun
21Mon8:564.39:104.22:080.02:270.06:326:43New Moon21Mon
22Tue9:344.49:514.12:400.03:070.06:336:41Waxing Crescent22Tue
23Wed10:164.510:354.03:13-0.13:460.16:346:39Waxing Crescent23Wed
24Thu11:014.411:243.93:480.04:260.26:356:37Waxing Crescent24Thu
25Fri11:514.44:270.15:100.46:366:36Waxing Crescent25Fri
26Sat12:183.712:464.35:110.26:040.66:376:34First Quarter26Sat
27Sun1:153.61:444.36:030.47:170.86:386:32First Quarter27Sun
28Mon2:153.62:464.27:100.69:150.76:396:31First Quarter28Mon
29Tue3:183.73:514.38:350.610:310.66:406:29First Quarter29Tue
30Wed4:243.94:594.410:060.511:220.36:426:27Waxing 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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