Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide : in 1h 51m at 12:31 pm (0.8 ft)
Next high tide : 6:16 pm (7.1 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 1937

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu3:387.34:076.410:330.510:451.15:266:09Waning Gibbous1Thu
2Fri4:267.24:566.211:230.711:361.25:246:10Third Quarter2Fri
3Sat5:177.15:486.112:150.85:226:11Third Quarter3Sat
4Sun6:097.06:416.112:291.31:090.85:216:12Third Quarter4Sun
5Mon7:037.07:366.21:241.32:030.75:196:14Third Quarter5Mon
6Tue7:597.08:316.52:211.12:560.65:176:15Waning Crescent6Tue
7Wed8:557.29:256.83:150.83:460.45:156:16Waning Crescent7Wed
8Thu9:487.310:157.34:070.54:340.25:146:17Waning Crescent8Thu
9Fri10:407.511:047.74:570.15:210.05:126:18New Moon9Fri
10Sat11:317.611:538.25:48-0.36:09-0.25:106:19New Moon10Sat
11Sun12:217.76:39-0.66:56-0.35:096:21New Moon11Sun
12Mon12:428.51:127.77:29-0.97:44-0.35:076:22New Moon12Mon
13Tue1:328.72:027.58:19-0.98:33-0.25:056:23Waxing Crescent13Tue
14Wed2:228.82:547.49:11-0.99:25-0.15:046:24Waxing Crescent14Wed
15Thu3:148.63:487.110:06-0.710:200.15:026:25Waxing Crescent15Thu
16Fri4:098.34:446.911:02-0.511:180.35:006:26First Quarter16Fri
17Sat5:068.05:416.711:59-0.24:596:27First Quarter17Sat
18Sun6:047.66:396.612:170.512:550.04:576:29First Quarter18Sun
19Mon7:037.37:396.61:160.61:520.24:566:30Waxing Gibbous19Mon
20Tue8:037.08:376.72:150.62:470.34:546:31Waxing Gibbous20Tue
21Wed9:006.89:306.83:120.53:380.34:526:32Waxing Gibbous21Wed
22Thu9:526.710:177.04:040.54:260.44:516:33Waxing Gibbous22Thu
23Fri10:396.611:007.14:540.45:120.54:496:34Full Moon23Fri
24Sat11:236.611:417.35:410.35:560.64:486:35Full Moon24Sat
25Sun1:056.57:260.37:390.75:467:37Full Moon25Sun
26Mon1:217.41:466.58:090.28:210.85:457:38Full Moon26Mon
27Tue2:017.52:276.58:520.39:020.95:437:39Full Moon27Tue
28Wed2:427.53:096.59:340.39:431.05:427:40Waning Gibbous28Wed
29Thu3:247.53:526.510:180.410:271.15:407:41Waning Gibbous29Thu
30Fri4:087.54:386.411:050.511:141.25:397:42Waning Gibbous30Fri
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 3:23 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 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