Tides Today & Tomorrow in Plum Island Sound, South End, MA

TIDE TIMES for Saturday, July 25, 2026
The tide is currently falling in Plum Island Sound, South End, MA.
Next low tide : in 3h 45m at 3:17 pm (1.7 ft)
Next high tide : 9:28 pm (8.8 ft)
Sunset today : 8:11 pm
Sunrise tomorrow : 5:28 am
Moon phase : Waxing Gibbous (86% illuminated)
Tide Station Location : Station #8441241
Common Questions About Tides

Plum Island Sound, South End, MA Tides - Oct 1968

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue7:438.38:069.51:360.21:520.96:406:24Waxing Gibbous1Tue
2Wed8:468.49:099.52:380.22:560.86:416:23Waxing Gibbous2Wed
3Thu9:458.710:079.43:360.23:550.66:426:21Waxing Gibbous3Thu
4Fri10:378.910:599.34:290.24:500.46:446:19Full Moon4Fri
5Sat11:249.211:469.25:160.25:390.26:456:17Full Moon5Sat
6Sun12:059.35:590.46:230.16:466:16Full Moon6Sun
7Mon12:299.012:449.46:390.57:050.16:476:14Full Moon7Mon
8Tue1:098.81:219.37:180.87:450.26:486:12Waning Gibbous8Tue
9Wed1:488.61:599.37:561.08:260.36:496:11Waning Gibbous9Wed
10Thu2:288.32:389.18:351.39:080.56:506:09Waning Gibbous10Thu
11Fri3:108.13:219.09:171.59:530.86:526:07Waning Gibbous11Fri
12Sat3:557.84:078.810:011.710:411.06:536:05Third Quarter12Sat
13Sun4:437.64:578.610:501.911:331.26:546:04Third Quarter13Sun
14Mon5:367.45:528.411:442.16:556:02Third Quarter14Mon
15Tue6:327.46:498.412:291.312:422.16:566:01Third Quarter15Tue
16Wed7:287.57:468.41:251.31:401.96:575:59Waning Crescent16Wed
17Thu8:227.88:418.62:191.12:361.66:595:57Waning Crescent17Thu
18Fri9:138.39:338.83:090.93:281.17:005:56Waning Crescent18Fri
19Sat10:008.810:239.13:560.74:180.67:015:54Waning Crescent19Sat
20Sun10:459.411:119.34:410.45:070.07:025:53New Moon20Sun
21Mon11:3010.011:599.55:240.25:54-0.57:035:51New Moon21Mon
22Tue12:1410.56:080.06:41-0.97:055:50New Moon22Tue
23Wed12:469.51:0110.86:530.07:30-1.27:065:48Waxing Crescent23Wed
24Thu1:359.51:4911.07:400.08:21-1.27:075:47Waxing Crescent24Thu
25Fri2:269.32:4110.98:300.19:15-1.07:085:45Waxing Crescent25Fri
26Sat3:209.13:3610.69:250.310:11-0.77:105:44Waxing Crescent26Sat
27Sun3:168.83:3510.29:230.510:10-0.46:114:42First Quarter27Sun
28Mon4:178.64:379.810:260.811:120.06:124:41First Quarter28Mon
29Tue5:218.55:439.411:320.96:134:40First Quarter29Tue
30Wed6:258.56:489.212:150.212:370.96:154:38Waxing Gibbous30Wed
31Thu7:268.77:509.01:150.31:400.76:164:37Waxing Gibbous31Thu
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8441241)

Common Questions About Plum Island Sound, South End, MA Tides

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What time does the tide turn (slack tide) in Plum Island Sound, South End, MA today?

Slack tide in Plum Island Sound, South End, MA is approximately 6:22 pm — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

Is this week a spring tide or neap tide in Plum Island Sound, South End, MA?

Plum Island Sound, South End, MA is currently in a spring phase. Tonight's moon is 86% 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 near their weekly maximum.

What datum are Plum Island Sound, South End, MA 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 Plum Island Sound, South End, MA?

Tide predictions for Plum Island Sound, South End, MA 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 Plum Island Sound, South End, MA?

Tide data for Plum Island Sound, South End, MA is sourced from NOAA Station #8441241. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8441241.

What is the moon phase in Plum Island Sound, South End, MA tonight?

Tonight the moon over Plum Island Sound, South End, MA is Waxing Gibbous (86% illuminated). This places Plum Island Sound, South End, MA in a spring tide cycle, so tidal ranges are near their weekly maximum 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