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

TIDE TIMES for Friday, July 10, 2026
The tide is currently falling in Plum Island Sound, South End, MA.
Next low tide : in 2h 20m at 2:17 pm (0.8 ft)
Next high tide : 8:31 pm (10.0 ft)
Sunset today : 8:22 pm
Sunrise tomorrow : 5:14 am
Moon phase : Waning Crescent (20% illuminated)
Tide Station Location : Station #8441241
Common Questions About Tides

Plum Island Sound, South End, MA Tides - Sep 1985

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun1:159.31:388.87:350.47:510.66:087:18Waning Gibbous1Sun
2Mon1:559.12:168.88:140.68:330.66:097:16Waning Gibbous2Mon
3Tue2:368.82:558.98:530.89:160.76:107:14Waning Gibbous3Tue
4Wed3:188.53:368.89:331.010:000.86:117:12Waning Gibbous4Wed
5Thu4:028.24:208.710:151.310:471.06:127:11Third Quarter5Thu
6Fri4:497.95:078.611:001.611:381.16:137:09Third Quarter6Fri
7Sat5:407.65:588.511:501.86:147:07Third Quarter7Sat
8Sun6:347.46:538.512:331.312:452.06:157:05Third Quarter8Sun
9Mon7:317.47:508.61:301.31:411.96:167:04Waning Crescent9Mon
10Tue8:277.48:458.82:271.22:361.86:177:02Waning Crescent10Tue
11Wed9:217.79:389.13:200.93:301.56:187:00Waning Crescent11Wed
12Thu10:128.110:299.54:110.64:211.06:196:58Waning Crescent12Thu
13Fri11:008.611:189.84:580.35:100.56:206:57New Moon13Fri
14Sat11:469.25:43-0.15:590.06:216:55New Moon14Sat
15Sun12:0610.112:319.86:27-0.46:47-0.56:236:53New Moon15Sun
16Mon12:5310.21:1610.27:11-0.57:36-0.86:246:51Waxing Crescent16Mon
17Tue1:4210.22:0310.67:57-0.58:27-1.06:256:49Waxing Crescent17Tue
18Wed2:3210.02:5310.78:44-0.49:20-1.06:266:48Waxing Crescent18Wed
19Thu3:259.63:4510.79:35-0.210:15-0.86:276:46Waxing Crescent19Thu
20Fri4:209.24:4010.410:290.211:13-0.56:286:44First Quarter20Fri
21Sat5:188.85:4010.111:280.56:296:42First Quarter21Sat
22Sun6:218.46:439.812:15-0.212:300.86:306:40First Quarter22Sun
23Mon7:268.27:499.51:190.11:351.06:316:39Waxing Gibbous23Mon
24Tue8:308.28:529.42:220.32:381.06:326:37Waxing Gibbous24Tue
25Wed9:308.39:509.33:220.33:370.96:336:35Waxing Gibbous25Wed
26Thu10:248.510:439.24:160.44:320.86:346:33Waxing Gibbous26Thu
27Fri11:128.611:309.15:050.45:210.66:366:32Full Moon27Fri
28Sat11:538.85:480.56:050.56:376:30Full Moon28Sat
29Sun12:129.012:308.96:270.66:460.56:386:28Full Moon29Sun
30Mon12:518.91:069.07:040.87:250.56:396:26Full Moon30Mon
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 5:24 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 20% 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 Waning Crescent (20% 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