Tides Today & Tomorrow in Mattapoisett Harbor, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently rising in Mattapoisett Harbor, MA.
Next low tide (tomorrow) : 6:26 am (0.6 ft)
Next high tide (tomorrow) : in 4h 07m at 1:21 am (3.3 ft)
Sunset today : 7:38 pm
Sunrise tomorrow : 5:55 am
Moon phase : First Quarter (36% illuminated)
Tide Station Location : Station #8447531
Common Questions About Tides

Mattapoisett Harbor, MA Tides - Sep 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri6:024.06:364.712:230.411:58 AM0.26:087:17Waxing Gibbous1Fri
2Sat6:594.47:284.91:060.212:540.16:097:15Full Moon2Sat
3Sun7:504.78:154.91:440.11:460.06:107:14Full Moon3Sun
4Mon8:374.99:004.82:190.02:350.06:117:12Full Moon4Mon
5Tue9:235.09:444.62:51-0.13:200.06:127:10Full Moon5Tue
6Wed10:074.910:274.33:220.04:000.16:137:09Waning Gibbous6Wed
7Thu10:514.711:114.03:550.04:380.36:147:07Waning Gibbous7Thu
8Fri11:364.311:573.64:290.25:160.56:167:05Waning Gibbous8Fri
9Sat12:224.05:050.45:570.86:177:04Waning Gibbous9Sat
10Sun12:453.31:103.75:450.66:481.06:187:02Third Quarter10Sun
11Mon1:343.12:003.46:320.88:101.26:197:00Third Quarter11Mon
12Tue2:253.02:523.37:321.09:561.26:206:59Third Quarter12Tue
13Wed3:192.93:513.28:481.010:551.06:216:57Third Quarter13Wed
14Thu4:193.04:553.310:050.911:370.96:226:55Waning Crescent14Thu
15Fri5:193.15:483.511:070.76:236:53Waning Crescent15Fri
16Sat6:093.46:303.712:130.611:56 AM0.56:246:52Waning Crescent16Sat
17Sun6:523.87:084.012:450.412:400.36:256:50Waning Crescent17Sun
18Mon7:314.17:464.21:150.21:220.16:266:48New Moon18Mon
19Tue8:104.48:254.31:460.02:040.06:276:46New Moon19Tue
20Wed8:504.79:074.32:18-0.12:47-0.16:286:45New Moon20Wed
21Thu9:324.89:514.32:52-0.23:30-0.16:296:43Waxing Crescent21Thu
22Fri10:164.910:394.13:28-0.24:120.06:306:41Waxing Crescent22Fri
23Sat11:054.811:313.94:08-0.14:560.16:316:39Waxing Crescent23Sat
24Sun10:594.611:283.73:500.04:460.45:325:38Waxing Crescent24Sun
25Mon11:594.44:380.25:490.75:335:36First Quarter25Mon
26Tue12:293.61:024.35:360.58:030.85:345:34First Quarter26Tue
27Wed1:323.62:064.26:540.79:300.75:355:33First Quarter27Wed
28Thu2:373.73:144.28:500.710:250.55:365:31Waxing Gibbous28Thu
29Fri3:453.94:214.310:160.511:080.45:375:29Waxing Gibbous29Fri
30Sat4:484.25:184.411:110.311:420.25:385:27Waxing Gibbous30Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447531)

Common Questions About Mattapoisett Harbor, MA Tides

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What time does the tide turn (slack tide) in Mattapoisett Harbor, MA today?

Slack tide in Mattapoisett Harbor, MA is approximately 3:53 am — 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 Mattapoisett Harbor, MA?

Mattapoisett Harbor, MA is currently in a transitional phase. Tonight's moon is 36% 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 Mattapoisett Harbor, 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 Mattapoisett Harbor, MA?

Tide predictions for Mattapoisett Harbor, 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 Mattapoisett Harbor, MA?

Tide data for Mattapoisett Harbor, MA is sourced from NOAA Station #8447531. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447531.

What is the moon phase in Mattapoisett Harbor, MA tonight?

Tonight the moon over Mattapoisett Harbor, MA is First Quarter (36% illuminated). This places Mattapoisett Harbor, MA 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