Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Friday, July 17, 2026
The tide is currently rising in Merrimacport, MA.
Next low tide (tomorrow) : 10:40 am (-0.3 ft)
Next high tide (tomorrow) : in 4h 32m at 3:54 am (8.0 ft)
Sunset today : 8:19 pm
Sunrise tomorrow : 5:21 am
Moon phase : Waxing Crescent (14% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Dec 2076

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue3:516.84:108.110:210.611:06-0.36:554:10First Quarter1Tue
2Wed4:486.85:077.911:210.66:564:10First Quarter2Wed
3Thu5:456.86:057.612:02-0.312:220.56:574:10First Quarter3Thu
4Fri6:437.07:057.412:58-0.21:230.46:584:10First Quarter4Fri
5Sat7:427.28:067.11:54-0.22:230.26:594:09Waxing Gibbous5Sat
6Sun8:407.49:056.92:49-0.13:210.07:004:09Waxing Gibbous6Sun
7Mon9:357.610:016.73:41-0.14:16-0.27:014:09Waxing Gibbous7Mon
8Tue10:257.810:526.64:310.05:08-0.37:024:09Full Moon8Tue
9Wed11:127.911:416.55:200.15:58-0.37:034:09Full Moon9Wed
10Thu11:577.96:080.36:46-0.37:044:09Full Moon10Thu
11Fri12:276.412:417.86:540.47:32-0.37:054:09Full Moon11Fri
12Sat1:116.31:247.87:390.68:17-0.17:054:10Waning Gibbous12Sat
13Sun1:546.22:077.68:240.79:020.07:064:10Waning Gibbous13Sun
14Mon2:386.22:527.59:100.99:480.27:074:10Waning Gibbous14Mon
15Tue3:246.23:387.39:581.010:360.37:084:10Waning Gibbous15Tue
16Wed4:126.14:277.110:481.111:240.47:084:11Third Quarter16Wed
17Thu5:016.25:176.811:411.27:094:11Third Quarter17Thu
18Fri5:516.26:096.612:130.612:341.27:104:11Third Quarter18Fri
19Sat6:426.47:016.41:030.71:291.17:104:12Third Quarter19Sat
20Sun7:346.57:556.31:540.72:241.07:114:12Waning Crescent20Sun
21Mon8:256.88:496.32:440.73:160.77:114:13Waning Crescent21Mon
22Tue9:157.19:406.33:320.74:070.57:124:13Waning Crescent22Tue
23Wed10:037.410:306.34:180.74:560.27:124:14Waning Crescent23Wed
24Thu10:507.711:206.45:040.65:44-0.17:124:14New Moon24Thu
25Fri11:388.05:510.56:33-0.37:134:15New Moon25Fri
26Sat12:096.612:278.36:380.47:21-0.67:134:16New Moon26Sat
27Sun12:596.71:168.47:260.28:09-0.77:134:17Waxing Crescent27Sun
28Mon1:496.82:068.58:160.18:59-0.87:134:17Waxing Crescent28Mon
29Tue2:396.92:588.49:080.19:50-0.77:144:18Waxing Crescent29Tue
30Wed3:327.03:528.210:040.110:44-0.67:144:19Waxing Crescent30Wed
31Thu4:287.14:487.811:020.17:144:20First Quarter31Thu
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 7:17 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 14% 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 (14% 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