Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide (tomorrow) : in 4h 23m at 1:07 am (0.7 ft)
Next high tide (tomorrow) : 6:42 am (6.1 ft)
Sunset today : 7:40 pm
Sunrise tomorrow : 5:54 am
Moon phase : First Quarter (46% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Apr 1936

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed7:566.88:316.12:080.82:450.55:256:09Waxing Gibbous1Wed
2Thu8:546.79:256.23:040.83:360.55:246:10Waxing Gibbous2Thu
3Fri9:466.710:126.43:560.74:240.55:226:12Waxing Gibbous3Fri
4Sat10:326.610:546.64:450.65:100.65:206:13Waxing Gibbous4Sat
5Sun11:166.611:356.85:320.55:530.65:186:14Full Moon5Sun
6Mon11:576.66:170.46:350.65:176:15Full Moon6Mon
7Tue12:157.112:386.77:000.37:150.75:156:16Full Moon7Tue
8Wed12:547.21:196.67:420.37:550.85:136:17Full Moon8Wed
9Thu1:347.42:006.68:240.38:340.95:126:18Waning Gibbous9Thu
10Fri2:157.52:426.69:070.49:151.05:106:20Waning Gibbous10Fri
11Sat2:587.53:286.59:520.49:591.15:086:21Waning Gibbous11Sat
12Sun3:457.54:176.410:410.510:481.25:076:22Waning Gibbous12Sun
13Mon4:357.45:096.311:330.611:421.25:056:23Third Quarter13Mon
14Tue5:287.46:036.412:260.65:036:24Third Quarter14Tue
15Wed6:247.46:596.512:391.21:220.55:026:25Third Quarter15Wed
16Thu7:227.47:576.81:391.02:180.35:006:27Waning Crescent16Thu
17Fri8:217.58:547.12:380.73:120.14:586:28Waning Crescent17Fri
18Sat9:197.59:487.63:350.34:03-0.14:576:29Waning Crescent18Sat
19Sun10:147.610:408.04:30-0.24:53-0.24:556:30Waning Crescent19Sun
20Mon11:087.611:318.45:23-0.55:43-0.34:546:31New Moon20Mon
21Tue12:017.66:16-0.86:32-0.34:526:32New Moon21Tue
22Wed12:218.712:527.57:08-1.07:22-0.24:506:33New Moon22Wed
23Thu1:118.81:437.37:59-0.98:11-0.14:496:35Waxing Crescent23Thu
24Fri2:018.72:337.18:50-0.89:020.14:476:36Waxing Crescent24Fri
25Sat2:518.53:246.99:42-0.59:550.44:466:37Waxing Crescent25Sat
26Sun4:438.15:176.611:36-0.211:500.65:447:38First Quarter26Sun
27Mon5:377.76:116.412:300.15:437:39First Quarter27Mon
28Tue6:317.47:066.312:460.81:230.35:427:40First Quarter28Tue
29Wed7:267.08:016.31:421.02:170.55:407:41First Quarter29Wed
30Thu8:226.78:566.42:391.03:110.75:397:43Waxing Gibbous30Thu
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 3:54 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 neap phase. Tonight's moon is 46% 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 minimum.

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 First Quarter (46% illuminated). This places Merrimacport, MA in a neap tide cycle, so tidal ranges are near their weekly minimum 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