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

TIDE TIMES for Thursday, July 30, 2026
The tide is currently rising in Plum Island Sound, South End, MA.
Next low tide : 7:00 pm (1.2 ft)
Next high tide : in 52m at 12:55 pm (8.0 ft)
Sunset today : 8:06 pm
Sunrise tomorrow : 5:33 am
Moon phase : Full Moon (99% illuminated)
Tide Station Location : Station #8441241
Common Questions About Tides

Plum Island Sound, South End, MA Tides - Dec 1962

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat1:538.52:059.77:580.98:36-0.26:534:10Waxing Crescent1Sat
2Sun2:418.62:559.68:480.99:26-0.16:544:10Waxing Crescent2Sun
3Mon3:338.73:499.59:420.810:20-0.16:554:10First Quarter3Mon
4Tue4:278.84:479.410:420.711:16-0.16:564:10First Quarter4Tue
5Wed5:259.15:489.311:440.56:574:09First Quarter5Wed
6Thu6:239.46:509.212:14-0.112:460.16:584:09Waxing Gibbous6Thu
7Fri7:219.87:509.21:11-0.21:47-0.36:594:09Waxing Gibbous7Fri
8Sat8:1710.28:499.32:07-0.22:45-0.77:004:09Waxing Gibbous8Sat
9Sun9:1210.59:459.33:01-0.33:41-1.07:014:09Waxing Gibbous9Sun
10Mon10:0510.810:399.33:55-0.34:34-1.27:024:09Full Moon10Mon
11Tue10:5510.811:309.34:46-0.35:25-1.37:034:09Full Moon11Tue
12Wed11:4410.85:36-0.26:14-1.27:044:09Full Moon12Wed
13Thu12:199.212:3210.56:25-0.17:03-1.07:044:09Waning Gibbous13Thu
14Fri1:079.01:2010.27:140.27:51-0.77:054:10Waning Gibbous14Fri
15Sat1:568.82:099.88:030.48:39-0.47:064:10Waning Gibbous15Sat
16Sun2:448.62:589.48:540.79:270.07:074:10Waning Gibbous16Sun
17Mon3:338.53:488.99:450.910:170.37:074:10Third Quarter17Mon
18Tue4:248.34:418.510:391.111:070.67:084:11Third Quarter18Tue
19Wed5:168.35:358.211:341.211:590.87:084:11Third Quarter19Wed
20Thu6:088.36:308.012:301.27:094:11Third Quarter20Thu
21Fri6:598.47:247.812:501.01:241.07:104:12Waning Crescent21Fri
22Sat7:498.68:167.81:401.12:150.97:104:12Waning Crescent22Sat
23Sun8:368.89:057.82:281.13:050.77:114:13Waning Crescent23Sun
24Mon9:219.09:517.93:151.13:510.47:114:13Waning Crescent24Mon
25Tue10:049.210:358.03:591.14:350.27:114:14New Moon25Tue
26Wed10:479.411:188.24:421.05:180.07:124:15New Moon26Wed
27Thu11:299.65:240.86:00-0.37:124:15New Moon27Thu
28Fri12:018.412:129.86:060.76:43-0.47:124:16New Moon28Fri
29Sat12:458.612:579.96:510.57:28-0.67:134:17Waxing Crescent29Sat
30Sun1:318.81:4510.07:380.48:15-0.67:134:18Waxing Crescent30Sun
31Mon2:209.02:369.98:290.39:05-0.67:134:18Waxing Crescent31Mon
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 3:57 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 99% 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 Full Moon (99% 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