Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Monday, June 29, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide : in 3h 22m at 7:17 am (0.6 ft)
Next high tide : 12:51 pm (5.9 ft)
Sunset today : 8:26 pm
Sunrise tomorrow : 5:08 am
Moon phase : Full Moon (100% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Aug 2009

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:345.79:587.13:570.84:071.15:358:04Waxing Gibbous1Sat
2Sun10:285.710:497.14:490.84:581.15:368:03Waxing Gibbous2Sun
3Mon11:175.711:367.15:390.75:461.15:378:02Waxing Gibbous3Mon
4Tue12:025.96:260.76:331.05:388:01Full Moon4Tue
5Wed12:207.212:466.07:110.67:190.95:397:59Full Moon5Wed
6Thu1:037.31:286.27:540.58:020.95:407:58Full Moon6Thu
7Fri1:457.42:096.58:350.58:450.85:417:57Full Moon7Fri
8Sat2:267.42:506.79:140.49:260.85:437:56Waning Gibbous8Sat
9Sun3:077.43:326.99:530.510:090.75:447:54Waning Gibbous9Sun
10Mon3:507.34:157.110:330.610:560.75:457:53Waning Gibbous10Mon
11Tue4:367.15:027.311:160.711:460.75:467:51Waning Gibbous11Tue
12Wed5:256.95:517.412:020.85:477:50Third Quarter12Wed
13Thu6:176.76:437.512:390.712:520.95:487:49Third Quarter13Thu
14Fri7:126.57:387.61:370.61:471.05:497:47Third Quarter14Fri
15Sat8:106.38:377.82:370.52:470.95:507:46Waning Crescent15Sat
16Sun9:126.39:387.93:370.33:470.85:517:44Waning Crescent16Sun
17Mon10:126.410:378.14:350.14:450.55:527:43Waning Crescent17Mon
18Tue11:106.611:338.35:30-0.25:400.25:537:41Waning Crescent18Tue
19Wed12:056.96:23-0.46:35-0.15:547:40New Moon19Wed
20Thu12:288.412:587.37:14-0.57:29-0.35:567:38New Moon20Thu
21Fri1:208.41:487.58:03-0.68:21-0.45:577:36New Moon21Fri
22Sat2:118.22:367.88:50-0.69:11-0.45:587:35Waxing Crescent22Sat
23Sun2:598.03:237.99:37-0.410:02-0.35:597:33Waxing Crescent23Sun
24Mon3:477.64:117.810:23-0.110:53-0.16:007:32Waxing Crescent24Mon
25Tue4:357.24:597.711:120.211:460.16:017:30First Quarter25Tue
26Wed5:266.75:497.512:020.56:027:28First Quarter26Wed
27Thu6:176.46:417.312:390.412:540.86:037:27First Quarter27Thu
28Fri7:096.07:347.11:340.71:471.16:047:25First Quarter28Fri
29Sat8:045.88:296.92:290.82:431.26:057:23Waxing Gibbous29Sat
30Sun9:005.79:256.93:250.93:381.26:067:22Waxing Gibbous30Sun
31Mon9:565.710:196.94:190.94:301.26:077:20Waxing Gibbous31Mon
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 10:04 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 Merrimacport, MA?

Merrimacport, MA is currently in a spring phase. Tonight's moon is 100% 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 Full Moon (100% 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