Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Sunday, July 12, 2026
The tide is currently rising in Merrimacport, MA.
Next low tide (tomorrow) : 6:28 am (-0.4 ft)
Next high tide : in 5h 08m at 11:34 pm (8.5 ft)
Sunset today : 8:22 pm
Sunrise tomorrow : 5:16 am
Moon phase : Waning Crescent (5% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Jul 1990

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun7:496.38:196.92:130.92:320.85:098:26First Quarter1Sun
2Mon8:436.09:107.03:080.93:231.05:098:26Waxing Gibbous2Mon
3Tue9:375.910:017.04:020.94:131.15:108:25Waxing Gibbous3Tue
4Wed10:285.810:497.14:530.85:011.25:108:25Waxing Gibbous4Wed
5Thu11:175.811:357.25:420.75:481.25:118:25Waxing Gibbous5Thu
6Fri12:035.86:290.76:351.25:128:25Full Moon6Fri
7Sat12:207.412:486.07:160.67:201.15:128:24Full Moon7Sat
8Sun1:047.51:336.18:000.58:041.15:138:24Full Moon8Sun
9Mon1:487.62:166.38:430.48:461.05:148:24Full Moon9Mon
10Tue2:317.73:006.59:240.39:300.95:148:23Waning Gibbous10Tue
11Wed3:157.83:456.810:060.210:150.85:158:23Waning Gibbous11Wed
12Thu4:017.74:327.010:500.211:050.85:168:22Waning Gibbous12Thu
13Fri4:497.65:217.211:360.211:590.75:178:22Waning Gibbous13Fri
14Sat5:417.46:137.512:240.35:188:21Third Quarter14Sat
15Sun6:357.17:067.712:550.61:150.45:188:20Third Quarter15Sun
16Mon7:316.98:017.81:540.42:100.55:198:20Third Quarter16Mon
17Tue8:306.68:598.02:550.33:070.55:208:19Waning Crescent17Tue
18Wed9:316.59:588.13:550.14:050.55:218:18Waning Crescent18Wed
19Thu10:316.410:558.34:52-0.15:010.45:228:17Waning Crescent19Thu
20Fri11:296.411:508.45:48-0.25:560.35:238:17New Moon20Fri
21Sat12:246.56:42-0.36:500.25:248:16New Moon21Sat
22Sun12:448.41:166.77:34-0.47:420.25:258:15New Moon22Sun
23Mon1:358.32:066.88:23-0.48:330.25:268:14New Moon23Mon
24Tue2:248.12:536.99:10-0.39:230.25:278:13Waxing Crescent24Tue
25Wed3:117.93:397.09:55-0.210:120.35:288:12Waxing Crescent25Wed
26Thu3:577.64:257.110:410.011:020.55:298:11Waxing Crescent26Thu
27Fri4:447.25:127.111:280.311:540.65:308:10First Quarter27Fri
28Sat5:326.86:007.012:150.65:318:09First Quarter28Sat
29Sun6:216.56:487.012:460.81:040.85:328:08First Quarter29Sun
30Mon7:126.27:396.91:390.91:541.05:338:07First Quarter30Mon
31Tue8:045.98:316.92:331.02:471.25:348:06Waxing 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 3:01 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 5% 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 (5% 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