Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Saturday, July 11, 2026
The tide is currently rising in Merrimacport, MA.
Next low tide : 4:45 pm (0.6 ft)
Next high tide : in 23m at 10:14 am (6.5 ft)
Sunset today : 8:23 pm
Sunrise tomorrow : 5:16 am
Moon phase : Waning Crescent (11% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Jun 1991

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat3:287.53:586.310:250.510:311.35:088:15Waning Gibbous1Sat
2Sun4:137.44:456.311:110.611:201.35:078:16Waning Gibbous2Sun
3Mon5:017.35:346.411:580.75:078:16Third Quarter3Mon
4Tue5:507.26:246.612:111.412:450.75:068:17Third Quarter4Tue
5Wed6:417.07:146.71:031.31:330.85:068:18Third Quarter5Wed
6Thu7:336.98:057.01:581.22:230.85:068:18Third Quarter6Thu
7Fri8:286.88:587.32:541.03:140.85:058:19Waning Crescent7Fri
8Sat9:246.79:517.63:490.74:050.75:058:20Waning Crescent8Sat
9Sun10:196.710:438.04:430.44:550.65:058:20Waning Crescent9Sun
10Mon11:146.711:358.45:360.05:440.55:058:21Waning Crescent10Mon
11Tue12:076.86:29-0.36:360.45:048:22New Moon11Tue
12Wed12:278.61:016.97:21-0.57:280.25:048:22New Moon12Wed
13Thu1:208.81:547.08:13-0.78:200.15:048:23New Moon13Thu
14Fri2:128.92:467.19:04-0.89:130.15:048:23Waxing Crescent14Fri
15Sat3:048.83:387.29:55-0.810:070.15:048:23Waxing Crescent15Sat
16Sun3:578.64:327.210:47-0.611:030.25:048:24Waxing Crescent16Sun
17Mon4:518.25:277.211:40-0.45:048:24First Quarter17Mon
18Tue5:467.86:217.312:000.312:32-0.25:048:25First Quarter18Tue
19Wed6:417.37:157.312:580.41:250.05:048:25First Quarter19Wed
20Thu7:366.98:097.31:550.52:170.35:058:25First Quarter20Thu
21Fri8:326.59:037.32:530.63:100.55:058:25Waxing Gibbous21Fri
22Sat9:286.29:557.33:490.64:020.75:058:26Waxing Gibbous22Sat
23Sun10:226.010:447.34:410.64:510.95:058:26Waxing Gibbous23Sun
24Mon11:115.911:297.35:310.55:391.05:068:26Waxing Gibbous24Mon
25Tue11:575.96:190.56:261.05:068:26Full Moon25Tue
26Wed12:137.412:415.97:060.57:111.15:068:26Full Moon26Wed
27Thu12:567.41:246.07:510.57:561.15:078:26Full Moon27Thu
28Fri1:397.52:076.18:340.58:391.15:078:26Full Moon28Fri
29Sat2:217.52:496.39:160.49:211.15:088:26Waning Gibbous29Sat
30Sun3:037.53:326.49:570.510:051.15:088:26Waning Gibbous30Sun
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 1:29 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 11% 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 Waning Crescent (11% 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