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 2h 06m 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 - Apr 1938

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri8:024.18:214.61:43-0.51:39-0.55:266:07New Moon1Fri
2Sat8:474.19:064.72:25-0.52:20-0.65:256:08Waxing Crescent2Sat
3Sun9:364.19:564.63:07-0.53:02-0.55:236:10Waxing Crescent3Sun
4Mon10:284.010:494.43:51-0.33:47-0.45:216:11Waxing Crescent4Mon
5Tue11:243.811:474.34:38-0.14:35-0.25:206:12Waxing Crescent5Tue
6Wed12:223.85:350.25:320.15:186:13First Quarter6Wed
7Thu12:484.11:233.77:140.46:460.35:166:14First Quarter7Thu
8Fri1:503.92:253.89:030.38:310.45:156:15First Quarter8Fri
9Sat2:563.93:304.010:030.210:040.25:136:16Waxing Gibbous9Sat
10Sun4:033.94:334.210:490.111:020.15:116:17Waxing Gibbous10Sun
11Mon5:044.05:304.511:250.011:480.05:106:18Waxing Gibbous11Mon
12Tue5:564.16:204.711:550.05:086:19Waxing Gibbous12Tue
13Wed6:444.27:064.812:29-0.112:24-0.15:066:20Full Moon13Wed
14Thu7:284.17:494.81:07-0.212:56-0.15:056:21Full Moon14Thu
15Fri8:114.18:314.61:44-0.21:32-0.15:036:23Full Moon15Fri
16Sat8:533.99:124.42:21-0.12:10-0.15:026:24Waning Gibbous16Sat
17Sun9:343.79:534.12:570.02:490.05:006:25Waning Gibbous17Sun
18Mon10:163.510:353.73:340.13:280.24:596:26Waning Gibbous18Mon
19Tue11:003.211:183.44:120.34:090.34:576:27Waning Gibbous19Tue
20Wed11:463.14:530.44:540.54:556:28Waning Gibbous20Wed
21Thu12:033.212:323.05:410.65:460.74:546:29Third Quarter21Thu
22Fri12:493.11:192.96:410.76:540.84:526:30Third Quarter22Fri
23Sat1:363.02:083.07:520.78:140.84:516:31Third Quarter23Sat
24Sun3:273.04:023.29:540.610:260.65:507:32Third Quarter24Sun
25Mon4:243.14:583.410:420.411:210.45:487:33Waning Crescent25Mon
26Tue5:223.35:513.811:230.25:477:35Waning Crescent26Tue
27Wed6:153.56:394.212:070.112:03-0.15:457:36Waning Crescent27Wed
28Thu7:043.87:264.612:52-0.112:43-0.35:447:37New Moon28Thu
29Fri7:524.18:124.91:36-0.31:25-0.45:427:38New Moon29Fri
30Sat8:394.38:595.02:23-0.42:10-0.55:417:39New Moon30Sat
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