Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Sunday, August 16, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide : in 1h 24m at 10:32 pm (0.1 ft)
Next high tide (tomorrow) : 4:15 am (7.2 ft)
Sunset today : 7:44 pm
Sunrise tomorrow : 5:51 am
Moon phase : Waxing Crescent (18% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Apr 1942

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed12:537.51:177.77:35-0.27:59-0.26:267:09Full Moon1Wed
2Thu1:407.92:057.88:23-0.58:44-0.36:247:10Full Moon2Thu
3Fri2:278.22:537.89:10-0.69:29-0.36:237:11Waning Gibbous3Fri
4Sat3:148.43:437.710:00-0.710:18-0.26:217:12Waning Gibbous4Sat
5Sun4:048.44:357.510:53-0.711:11-0.16:197:13Waning Gibbous5Sun
6Mon4:578.45:307.311:49-0.66:177:15Third Quarter6Mon
7Tue5:538.26:277.012:060.112:46-0.46:167:16Third Quarter7Tue
8Wed6:508.07:256.81:040.31:44-0.36:147:17Third Quarter8Wed
9Thu7:497.78:266.72:040.42:43-0.16:127:18Third Quarter9Thu
10Fri8:517.59:276.73:040.43:41-0.16:117:19Waning Crescent10Fri
11Sat9:517.310:256.84:030.34:35-0.16:097:20Waning Crescent11Sat
12Sun10:477.311:177.04:580.25:270.06:077:21Waning Crescent12Sun
13Mon11:397.25:500.16:150.06:067:23New Moon13Mon
14Tue12:047.112:267.16:390.17:010.16:047:24New Moon14Tue
15Wed12:477.31:107.07:270.07:460.26:027:25New Moon15Wed
16Thu1:297.41:527.08:120.08:290.36:017:26New Moon16Thu
17Fri2:097.52:336.98:550.09:110.55:597:27Waxing Crescent17Fri
18Sat2:507.53:156.89:390.19:530.75:577:28Waxing Crescent18Sat
19Sun3:317.53:586.710:230.210:370.95:567:29Waxing Crescent19Sun
20Mon4:157.44:446.611:100.411:241.05:547:31Waxing Crescent20Mon
21Tue5:027.35:336.511:590.55:537:32Waxing Crescent21Tue
22Wed5:517.26:236.412:141.212:490.65:517:33First Quarter22Wed
23Thu6:427.17:156.31:061.31:410.75:507:34First Quarter23Thu
24Fri7:357.08:086.41:591.32:350.75:487:35First Quarter24Fri
25Sat8:307.09:036.52:551.23:280.65:477:36First Quarter25Sat
26Sun9:257.19:566.83:491.04:190.55:457:37Waxing Gibbous26Sun
27Mon10:197.210:477.24:410.75:070.35:447:39Waxing Gibbous27Mon
28Tue11:117.411:367.65:310.35:550.15:427:40Waxing Gibbous28Tue
29Wed12:017.56:210.06:420.05:417:41Full Moon29Wed
30Thu12:258.112:527.77:11-0.47:29-0.15:397:42Full Moon30Thu
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 1:23 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 18% 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 Waxing Crescent (18% 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