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 2h 40m 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 - May 1937

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat4:557.45:286.411:530.65:387:43Waning Gibbous1Sat
2Sun5:457.36:196.412:041.312:430.75:367:45Third Quarter2Sun
3Mon6:377.27:116.512:571.31:340.75:357:46Third Quarter3Mon
4Tue7:317.28:056.71:521.22:270.65:347:47Third Quarter4Tue
5Wed8:267.18:597.02:491.03:200.55:327:48Waning Crescent5Wed
6Thu9:237.29:547.43:460.74:110.45:317:49Waning Crescent6Thu
7Fri10:197.210:467.84:400.35:010.25:307:50Waning Crescent7Fri
8Sat11:137.311:378.35:33-0.15:500.15:297:51Waning Crescent8Sat
9Sun12:067.46:25-0.46:400.05:277:52New Moon9Sun
10Mon12:288.612:597.47:18-0.77:30-0.15:267:53New Moon10Mon
11Tue1:198.91:527.48:10-0.98:21-0.15:257:54New Moon11Tue
12Wed2:109.02:437.49:01-1.09:12-0.15:247:56Waxing Crescent12Wed
13Thu3:028.93:357.29:53-0.910:040.05:237:57Waxing Crescent13Thu
14Fri3:548.74:287.110:46-0.711:000.25:227:58Waxing Crescent14Fri
15Sat4:488.35:237.011:40-0.411:570.45:217:59First Quarter15Sat
16Sun5:437.96:196.912:34-0.25:208:00First Quarter16Sun
17Mon6:397.57:156.812:540.51:280.15:198:01First Quarter17Mon
18Tue7:357.18:106.81:520.72:220.35:188:02First Quarter18Tue
19Wed8:316.89:056.92:490.73:150.45:178:03Waxing Gibbous19Wed
20Thu9:276.59:577.03:450.74:060.65:168:04Waxing Gibbous20Thu
21Fri10:206.410:447.14:370.64:540.75:158:05Waxing Gibbous21Fri
22Sat11:086.311:287.25:270.55:400.85:148:06Waxing Gibbous22Sat
23Sun11:536.26:140.56:250.95:138:07Full Moon23Sun
24Mon12:107.312:366.27:000.47:100.95:128:08Full Moon24Mon
25Tue12:527.41:196.37:450.47:531.05:128:09Full Moon25Tue
26Wed1:347.52:016.38:280.48:351.05:118:10Full Moon26Wed
27Thu2:157.62:446.49:100.49:171.15:108:11Waning Gibbous27Thu
28Fri2:587.63:276.49:530.410:001.25:108:11Waning Gibbous28Fri
29Sat3:417.64:126.510:380.410:451.25:098:12Waning Gibbous29Sat
30Sun4:287.65:016.611:240.511:351.25:088:13Waning Gibbous30Sun
31Mon5:177.55:516.712:120.55:088:14Third Quarter31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8440369)

Common Questions About Merrimacport, MA Tides

Show All
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