Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Wednesday, August 19, 2026
The tide is currently falling in Merrimacport, MA.
Next low tide (tomorrow) : in 4h 51m at 1:07 am (0.7 ft)
Next high tide (tomorrow) : 6:42 am (6.1 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 - May 1936

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri9:186.59:496.53:351.04:020.75:377:44Waxing Gibbous1Fri
2Sat10:116.410:376.74:280.94:500.85:367:45Waxing Gibbous2Sat
3Sun10:596.411:206.95:170.75:350.85:357:46Waxing Gibbous3Sun
4Mon11:446.46:040.66:190.85:337:47Full Moon4Mon
5Tue12:027.112:276.46:500.57:030.95:327:48Full Moon5Tue
6Wed12:447.31:106.47:350.47:451.05:317:49Full Moon6Wed
7Thu1:257.51:526.58:180.38:261.05:297:50Full Moon7Thu
8Fri2:067.62:356.59:000.39:061.15:287:51Waning Gibbous8Fri
9Sat2:497.73:186.59:430.39:481.15:277:53Waning Gibbous9Sat
10Sun3:337.84:046.510:280.310:331.15:267:54Waning Gibbous10Sun
11Mon4:197.84:536.611:160.311:231.15:257:55Waning Gibbous11Mon
12Tue5:107.75:466.612:070.35:247:56Third Quarter12Tue
13Wed6:047.76:396.812:181.112:590.35:227:57Third Quarter13Wed
14Thu6:597.67:347.01:161.01:520.35:217:58Third Quarter14Thu
15Fri7:567.58:317.32:150.82:470.25:207:59Third Quarter15Fri
16Sat8:557.49:287.63:150.53:410.15:198:00Waning Crescent16Sat
17Sun9:547.310:238.04:140.14:340.15:188:01Waning Crescent17Sun
18Mon10:517.211:168.45:09-0.25:260.05:178:02Waning Crescent18Mon
19Tue11:467.26:04-0.56:170.05:168:03New Moon19Tue
20Wed12:088.612:407.16:57-0.77:080.05:168:04New Moon20Wed
21Thu12:598.71:327.07:49-0.77:590.15:158:05New Moon21Thu
22Fri1:508.72:227.08:40-0.78:490.25:148:06Waxing Crescent22Fri
23Sat2:398.63:116.89:30-0.69:390.35:138:07Waxing Crescent23Sat
24Sun3:288.34:006.710:19-0.310:310.55:128:08Waxing Crescent24Sun
25Mon4:178.04:516.611:10-0.111:240.75:128:09Waxing Crescent25Mon
26Tue5:087.65:436.612:010.25:118:10First Quarter26Tue
27Wed6:007.36:346.512:180.912:520.45:108:11First Quarter27Wed
28Thu6:526.97:266.61:121.01:420.65:108:12First Quarter28Thu
29Fri7:446.68:176.72:071.12:330.75:098:13First Quarter29Fri
30Sat8:386.49:096.83:021.03:240.85:088:13Waxing Gibbous30Sat
31Sun9:326.29:586.93:560.94:130.95:088:14Waxing Gibbous31Sun
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 3:54 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 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