Tides Today & Tomorrow in Mattapoisett Harbor, MA

TIDE TIMES for Tuesday, August 18, 2026
The tide is currently falling in Mattapoisett Harbor, MA.
Next low tide : in 2h 09m at 6:38 pm (0.8 ft)
Next high tide (tomorrow) : 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 - Mar 1934

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu7:433.78:043.91:18-0.31:44-0.36:185:32Full Moon1Thu
2Fri8:183.78:394.01:57-0.42:12-0.36:175:34Full Moon2Fri
3Sat8:553.79:174.02:34-0.42:41-0.46:155:35Waning Gibbous3Sat
4Sun9:353.69:594.03:11-0.33:12-0.46:135:36Waning Gibbous4Sun
5Mon10:203.410:453.93:47-0.23:46-0.36:125:37Waning Gibbous5Mon
6Tue11:113.311:373.84:28-0.14:26-0.26:105:38Waning Gibbous6Tue
7Wed12:063.15:160.15:140.06:095:39Third Quarter7Wed
8Thu12:353.81:063.06:200.46:160.16:075:41Third Quarter8Thu
9Fri1:383.72:093.18:040.57:370.26:055:42Third Quarter9Fri
10Sat2:463.73:183.29:510.39:120.16:045:43Waning Crescent10Sat
11Sun3:583.94:283.610:490.110:33-0.16:025:44Waning Crescent11Sun
12Mon5:044.15:294.011:35-0.111:34-0.36:005:45Waning Crescent12Mon
13Tue5:594.46:224.412:14-0.35:595:46Waning Crescent13Tue
14Wed6:494.57:114.712:27-0.512:51-0.45:575:47New Moon14Wed
15Thu7:364.67:584.91:18-0.61:26-0.55:555:49New Moon15Thu
16Fri8:214.48:434.82:05-0.62:01-0.55:545:50New Moon16Fri
17Sat9:064.29:284.62:47-0.52:35-0.45:525:51Waxing Crescent17Sat
18Sun9:513.910:134.33:24-0.33:11-0.35:505:52Waxing Crescent18Sun
19Mon10:373.511:003.94:000.03:47-0.15:485:53Waxing Crescent19Mon
20Tue11:253.211:493.54:380.24:270.25:475:54Waxing Crescent20Tue
21Wed12:163.05:210.55:110.45:455:55First Quarter21Wed
22Thu12:413.21:082.86:200.86:070.65:435:56First Quarter22Thu
23Fri1:352.92:022.78:140.97:200.75:425:57First Quarter23Fri
24Sat2:352.83:022.79:320.88:470.75:405:59First Quarter24Sat
25Sun3:422.84:042.810:190.79:570.55:386:00Waxing Gibbous25Sun
26Mon4:402.94:583.110:550.510:490.35:376:01Waxing Gibbous26Mon
27Tue5:233.15:413.411:280.211:330.15:356:02Waxing Gibbous27Tue
28Wed6:003.46:183.711:580.05:336:03Waxing Gibbous28Wed
29Thu6:353.66:554.012:14-0.112:29-0.15:316:04Full Moon29Thu
30Fri7:113.77:324.312:55-0.21:00-0.35:306:05Full Moon30Fri
31Sat7:503.88:104.41:35-0.41:33-0.35:286:06Full Moon31Sat
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 9:59 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 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