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 58m 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 - Oct 1933

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun5:424.56:084.511:570.25:395:26Waxing Gibbous1Sun
2Mon6:314.86:534.512:100.112:390.15:405:24Full Moon2Mon
3Tue7:154.97:364.412:370.11:180.15:415:22Full Moon3Tue
4Wed7:584.98:184.31:070.01:560.15:435:21Full Moon4Wed
5Thu8:394.88:594.01:400.02:330.25:445:19Waning Gibbous5Thu
6Fri9:194.59:413.82:160.13:090.35:455:17Waning Gibbous6Fri
7Sat9:594.210:243.52:540.23:450.55:465:16Waning Gibbous7Sat
8Sun10:423.811:103.23:320.44:240.75:475:14Waning Gibbous8Sun
9Mon11:283.54:130.65:090.95:485:12Third Quarter9Mon
10Tue12:003.012:173.34:590.86:111.15:495:11Third Quarter10Tue
11Wed12:502.91:083.25:561.08:011.15:505:09Third Quarter11Wed
12Thu1:412.91:593.17:101.09:111.05:515:07Third Quarter12Thu
13Fri2:353.02:543.28:340.99:530.85:525:06Third Quarter13Fri
14Sat3:323.23:513.39:400.710:270.65:545:04Waning Crescent14Sat
15Sun4:253.64:423.610:310.510:580.35:555:03Waning Crescent15Sun
16Mon5:134.05:293.811:150.311:280.15:565:01Waning Crescent16Mon
17Tue5:564.46:134.011:580.05:574:59New Moon17Tue
18Wed6:394.76:584.212:02-0.112:41-0.15:584:58New Moon18Wed
19Thu7:225.07:444.312:38-0.31:26-0.25:594:56New Moon19Thu
20Fri8:075.18:314.31:19-0.32:13-0.26:004:55New Moon20Fri
21Sat8:565.19:224.12:02-0.33:00-0.16:024:53Waxing Crescent21Sat
22Sun9:485.010:174.02:48-0.23:480.06:034:52Waxing Crescent22Sun
23Mon10:454.711:163.93:360.04:400.36:044:50Waxing Crescent23Mon
24Tue11:464.54:280.25:520.56:054:49First Quarter24Tue
25Wed12:183.812:494.35:310.57:580.66:064:48First Quarter25Wed
26Thu1:203.81:524.17:100.79:090.56:074:46First Quarter26Thu
27Fri2:233.92:554.09:190.610:000.46:094:45Waxing Gibbous27Fri
28Sat3:284.03:584.010:220.510:390.36:104:43Waxing Gibbous28Sat
29Sun4:294.34:554.011:110.411:070.36:114:42Waxing Gibbous29Sun
30Mon5:234.55:454.011:510.311:300.26:124:41Waxing Gibbous30Mon
31Tue6:104.76:304.012:270.26:134:40Full Moon31Tue
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