Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Saturday, July 18, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide : in 37m at 10:40 am (-0.3 ft)
Next high tide : 4:26 pm (7.1 ft)
Sunset today : 8:18 pm
Sunrise tomorrow : 5:21 am
Moon phase : Waxing Crescent (23% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Aug 2077

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun10:416.111:027.75:070.65:151.05:368:04Waxing Gibbous1Sun
2Mon11:326.311:528.05:580.36:040.85:378:03Waxing Gibbous2Mon
3Tue12:246.56:480.06:540.65:388:01Full Moon3Tue
4Wed12:438.21:146.87:37-0.37:440.35:398:00Full Moon4Wed
5Thu1:348.52:047.18:25-0.58:340.15:407:59Full Moon5Thu
6Fri2:248.62:547.49:12-0.69:25-0.15:417:58Waning Gibbous6Fri
7Sat3:148.53:447.610:00-0.610:18-0.25:427:56Waning Gibbous7Sat
8Sun4:058.34:367.810:50-0.511:13-0.25:437:55Waning Gibbous8Sun
9Mon4:597.95:297.811:41-0.35:447:53Third Quarter9Mon
10Tue5:547.56:237.912:10-0.112:34-0.15:457:52Third Quarter10Tue
11Wed6:507.07:187.81:080.01:280.25:477:51Third Quarter11Wed
12Thu7:476.68:157.72:070.12:240.45:487:49Third Quarter12Thu
13Fri8:476.39:147.63:070.23:200.65:497:48Waning Crescent13Fri
14Sat9:476.110:117.54:050.34:160.75:507:46Waning Crescent14Sat
15Sun10:436.011:047.44:590.35:090.85:517:45Waning Crescent15Sun
16Mon11:356.011:537.45:510.35:590.85:527:43New Moon16Mon
17Tue12:226.16:390.36:480.85:537:42New Moon17Tue
18Wed12:387.41:056.27:250.37:340.75:547:40New Moon18Wed
19Thu1:217.41:476.38:090.38:190.75:557:39New Moon19Thu
20Fri2:037.42:276.58:500.49:020.75:567:37Waxing Crescent20Fri
21Sat2:437.33:076.79:310.59:450.75:577:36Waxing Crescent21Sat
22Sun3:257.23:486.810:120.610:290.85:587:34Waxing Crescent22Sun
23Mon4:087.14:316.910:540.711:160.95:597:32Waxing Crescent23Mon
24Tue4:536.85:177.011:370.96:017:31Waxing Crescent24Tue
25Wed5:416.66:057.012:050.912:231.16:027:29First Quarter25Wed
26Thu6:316.46:557.012:571.01:121.26:037:27First Quarter26Thu
27Fri7:236.27:477.11:511.02:041.36:047:26First Quarter27Fri
28Sat8:196.18:437.22:470.92:591.36:057:24Waxing Gibbous28Sat
29Sun9:166.19:407.43:440.73:551.26:067:22Waxing Gibbous29Sun
30Mon10:136.210:357.74:380.54:480.96:077:21Waxing Gibbous30Mon
31Tue11:086.511:298.05:310.25:400.66:087:19Waxing Gibbous31Tue
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 1:33 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 transitional phase. Tonight's moon is 23% 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 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 Waxing Crescent (23% illuminated). This places Merrimacport, 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