Nearby Harbors
41.5865’ N, 71.2919’ W

Portsmouth, Melville, RI

57°
H -°
L 51°
SE
3mph
High tide
11:55 pm
Photo Credits

Tides Today & Tomorrow in Portsmouth, Melville, RI

TIDE TIMES for Tuesday, September 15, 2026
The tide is currently rising in Portsmouth, Melville, RI.
Next low tide (tomorrow) : 4:43 am (0.5 ft)
Next high tide : in 3h 08m at 11:55 pm (3.5 ft)
Sunset today : 6:54 pm
Sunrise tomorrow : 6:25 am
Moon phase : Waxing Crescent (21% 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 - Feb 1968

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu9:444.010:073.82:41-0.33:08-0.36:574:59Waxing Crescent1Thu
2Fri10:273.710:513.63:21-0.13:37-0.26:565:01Waxing Crescent2Fri
3Sat11:093.311:353.44:010.14:100.06:555:02Waxing Crescent3Sat
4Sun11:523.04:430.34:460.16:545:03First Quarter4Sun
5Mon12:193.212:362.75:340.65:290.36:535:04First Quarter5Mon
6Tue1:023.01:212.56:400.86:210.56:525:06First Quarter6Tue
7Wed1:472.92:112.38:080.87:230.56:515:07First Quarter7Wed
8Thu2:402.83:112.39:240.78:310.56:505:08Waxing Gibbous8Thu
9Fri3:472.84:172.510:200.69:340.36:485:10Waxing Gibbous9Fri
10Sat4:513.05:132.711:050.410:280.16:475:11Waxing Gibbous10Sat
11Sun5:393.35:593.011:470.111:17-0.16:465:12Waxing Gibbous11Sun
12Mon6:213.66:423.312:26-0.16:455:13Full Moon12Mon
13Tue7:023.97:243.712:02-0.41:03-0.36:435:15Full Moon13Tue
14Wed7:434.18:073.912:48-0.51:37-0.56:425:16Full Moon14Wed
15Thu8:254.28:514.11:33-0.72:10-0.66:415:17Full Moon15Thu
16Fri9:094.29:374.22:18-0.72:43-0.76:395:18Waning Gibbous16Fri
17Sat9:564.010:254.33:03-0.63:18-0.76:385:20Waning Gibbous17Sat
18Sun10:463.811:174.23:48-0.43:56-0.56:375:21Waning Gibbous18Sun
19Mon11:413.54:38-0.24:39-0.36:355:22Third Quarter19Mon
20Tue12:134.112:383.35:380.25:31-0.16:345:23Third Quarter20Tue
21Wed1:123.91:393.17:160.46:370.26:325:24Third Quarter21Wed
22Thu2:163.82:453.09:150.48:040.36:315:26Third Quarter22Thu
23Fri3:273.83:573.110:230.39:400.26:295:27Waning Crescent23Fri
24Sat4:383.85:033.311:170.210:470.16:285:28Waning Crescent24Sat
25Sun5:394.05:593.612:010.06:265:29Waning Crescent25Sun
26Mon6:304.26:473.912:39-0.16:255:31New Moon26Mon
27Tue7:154.27:324.112:24-0.21:09-0.26:235:32New Moon27Tue
28Wed7:574.28:154.11:05-0.31:34-0.36:225:33New Moon28Wed
29Thu8:364.18:554.11:44-0.32:00-0.36:205:34New Moon29Thu
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 21% 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 Crescent (21% 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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