Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Tuesday, August 11, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide : in 5h 23m at 6:18 pm (0.2 ft)
Next high tide (tomorrow) : 12:13 am (8.3 ft)
Sunset today : 7:52 pm
Sunrise tomorrow : 5:46 am
Moon phase : New Moon (2% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Mar 1950

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed9:497.210:196.04:021.04:440.46:205:32Waxing Gibbous1Wed
2Thu10:407.511:096.44:520.75:320.16:185:33Waxing Gibbous2Thu
3Fri11:297.711:576.85:410.46:18-0.26:165:35Full Moon3Fri
4Sat12:187.96:300.07:03-0.46:155:36Full Moon4Sat
5Sun12:447.21:068.07:18-0.37:47-0.56:135:37Full Moon5Sun
6Mon1:317.61:547.98:07-0.58:31-0.56:115:38Waning Gibbous6Mon
7Tue2:187.92:437.78:57-0.69:18-0.36:105:40Waning Gibbous7Tue
8Wed3:078.13:357.39:51-0.610:08-0.16:085:41Waning Gibbous8Wed
9Thu3:588.14:296.910:47-0.411:010.26:065:42Third Quarter9Thu
10Fri4:538.05:256.511:45-0.211:580.46:055:43Third Quarter10Fri
11Sat5:507.76:246.112:450.06:035:44Third Quarter11Sat
12Sun6:497.57:255.912:580.71:460.26:015:46Third Quarter12Sun
13Mon7:517.38:305.81:590.82:460.35:595:47Waning Crescent13Mon
14Tue8:547.19:315.92:590.83:430.35:585:48Waning Crescent14Tue
15Wed9:527.110:246.03:550.74:350.35:565:49Waning Crescent15Wed
16Thu10:437.111:116.24:480.65:230.25:545:50New Moon16Thu
17Fri11:307.011:546.55:370.56:080.25:525:51New Moon17Fri
18Sat12:127.06:240.46:500.35:515:53New Moon18Sat
19Sun12:346.712:536.97:090.37:300.45:495:54New Moon19Sun
20Mon1:126.91:326.87:510.38:100.55:475:55Waxing Crescent20Mon
21Tue1:507.02:126.78:330.38:490.75:455:56Waxing Crescent21Tue
22Wed2:297.12:536.69:160.49:290.95:445:57Waxing Crescent22Wed
23Thu3:117.13:386.410:010.510:121.15:425:58Waxing Crescent23Thu
24Fri3:567.14:256.210:500.710:591.35:406:00Waxing Crescent24Fri
25Sat4:447.05:156.011:410.811:501.45:386:01First Quarter25Sat
26Sun5:356.96:075.812:350.95:376:02First Quarter26Sun
27Mon6:286.97:035.812:441.51:310.95:356:03First Quarter27Mon
28Tue7:256.98:005.81:421.52:280.85:336:04First Quarter28Tue
29Wed8:237.18:576.12:391.33:210.65:316:05Waxing Gibbous29Wed
30Thu9:197.39:506.53:341.04:110.35:306:07Waxing Gibbous30Thu
31Fri10:127.510:417.04:260.64:590.15:286:08Waxing Gibbous31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8440369)

Common Questions About Merrimacport, MA Tides

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

Slack tide in Merrimacport, MA is approximately 9:15 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 Merrimacport, MA?

Merrimacport, MA is currently in a spring phase. Tonight's moon is 2% 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 near their weekly maximum.

What datum are Merrimacport, 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 Merrimacport, MA?

Tide predictions for Merrimacport, 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 Merrimacport, MA?

Tide data for Merrimacport, MA is sourced from NOAA Station #8440369. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8440369.

What is the moon phase in Merrimacport, MA tonight?

Tonight the moon over Merrimacport, MA is New Moon (2% illuminated). This places Merrimacport, MA in a spring tide cycle, so tidal ranges are near their weekly maximum 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