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 1h 31m 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 - Jun 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu1:513.42:333.67:480.58:230.75:118:10First Quarter1Thu
2Fri2:433.43:243.88:440.49:380.65:108:11First Quarter2Fri
3Sat3:403.44:214.19:390.310:450.45:108:12Waxing Gibbous3Sat
4Sun4:443.45:214.510:320.111:430.15:098:12Waxing Gibbous4Sun
5Mon5:483.66:204.811:24-0.15:098:13Waxing Gibbous5Mon
6Tue6:473.97:155.112:37-0.112:16-0.35:098:14Full Moon6Tue
7Wed7:424.18:095.31:31-0.21:08-0.45:088:14Full Moon7Wed
8Thu8:364.39:025.42:28-0.32:03-0.45:088:15Full Moon8Thu
9Fri9:304.49:565.33:25-0.33:00-0.35:088:16Full Moon9Fri
10Sat10:244.410:505.04:19-0.23:58-0.25:088:16Waning Gibbous10Sat
11Sun11:194.411:464.75:09-0.14:540.05:088:17Waning Gibbous11Sun
12Mon12:164.35:580.15:520.35:088:17Waning Gibbous12Mon
13Tue12:424.41:144.26:510.37:070.65:088:18Third Quarter13Tue
14Wed1:364.12:104.27:480.48:520.75:078:18Third Quarter14Wed
15Thu2:303.73:044.18:400.510:060.85:078:19Third Quarter15Thu
16Fri3:233.54:004.09:230.611:010.85:088:19Third Quarter16Fri
17Sat4:203.24:574.010:020.611:440.75:088:19Waning Crescent17Sat
18Sun5:183.25:524.010:420.65:088:20Waning Crescent18Sun
19Mon6:123.26:404.012:200.711:23 AM0.55:088:20Waning Crescent19Mon
20Tue7:003.27:234.012:530.612:060.55:088:20Waning Crescent20Tue
21Wed7:433.38:024.01:300.512:490.45:088:20New Moon21Wed
22Thu8:233.48:394.02:100.41:330.35:088:21New Moon22Thu
23Fri9:013.59:144.02:530.32:180.35:098:21New Moon23Fri
24Sat9:403.59:504.03:330.33:030.35:098:21New Moon24Sat
25Sun10:193.510:263.94:090.33:460.35:098:21Waxing Crescent25Sun
26Mon10:593.511:053.84:400.34:260.45:108:21Waxing Crescent26Mon
27Tue11:423.511:483.75:090.35:060.55:108:21Waxing Crescent27Tue
28Wed12:273.65:400.35:500.65:108:21Waxing Crescent28Wed
29Thu12:343.61:143.76:160.36:420.65:118:21First Quarter29Thu
30Fri1:243.52:023.97:000.37:470.75:118:21First Quarter30Fri
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