Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Monday, June 29, 2026
The tide is currently rising in Merrimacport, MA.
Next low tide (tomorrow) : 8:01 am (0.5 ft)
Next high tide (tomorrow) : in 2h 38m at 1:06 am (7.4 ft)
Sunset today : 8:26 pm
Sunrise tomorrow : 5:08 am
Moon phase : Full Moon (100% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Oct 2008

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed2:066.92:227.58:390.59:070.16:416:24Waxing Crescent1Wed
2Thu2:476.83:027.59:200.79:510.36:426:23Waxing Crescent2Thu
3Fri3:296.63:447.410:020.910:370.56:446:21Waxing Crescent3Fri
4Sat4:136.44:297.310:471.111:250.76:456:19Waxing Crescent4Sat
5Sun5:006.25:187.211:361.46:466:18First Quarter5Sun
6Mon5:506.06:097.012:160.812:271.56:476:16First Quarter6Mon
7Tue6:425.97:026.91:091.01:221.66:486:14First Quarter7Tue
8Wed7:365.97:576.82:031.02:181.66:496:12First Quarter8Wed
9Thu8:315.98:536.82:581.03:141.46:506:11Waxing Gibbous9Thu
10Fri9:266.29:486.93:500.94:071.26:526:09Waxing Gibbous10Fri
11Sat10:186.510:397.14:390.74:580.96:536:07Waxing Gibbous11Sat
12Sun11:066.911:287.25:250.55:460.56:546:06Waxing Gibbous12Sun
13Mon11:527.46:090.46:340.26:556:04Full Moon13Mon
14Tue12:167.312:377.86:530.37:22-0.16:566:02Full Moon14Tue
15Wed1:047.41:238.27:370.28:09-0.46:576:01Full Moon15Wed
16Thu1:527.42:108.58:210.28:58-0.56:595:59Waning Gibbous16Thu
17Fri2:407.32:588.69:070.29:48-0.67:005:58Waning Gibbous17Fri
18Sat3:307.13:488.69:560.310:42-0.47:015:56Waning Gibbous18Sat
19Sun4:236.94:438.410:510.511:39-0.37:025:54Waning Gibbous19Sun
20Mon5:196.75:408.111:500.67:035:53Third Quarter20Mon
21Tue6:186.56:407.812:37-0.112:510.77:055:51Third Quarter21Tue
22Wed7:186.57:417.51:350.11:520.87:065:50Third Quarter22Wed
23Thu8:206.58:437.32:340.22:540.77:075:48Waning Crescent23Thu
24Fri9:216.69:447.13:310.23:540.67:085:47Waning Crescent24Fri
25Sat10:186.910:406.94:240.24:490.47:105:45Waning Crescent25Sat
26Sun11:077.111:306.85:130.35:400.37:115:44Waning Crescent26Sun
27Mon11:517.35:590.46:290.27:125:42New Moon27Mon
28Tue12:156.712:337.46:440.57:150.17:135:41New Moon28Tue
29Wed12:586.51:137.57:270.68:000.17:155:40New Moon29Wed
30Thu1:396.51:537.58:090.88:430.27:165:38New Moon30Thu
31Fri2:206.42:337.58:511.09:250.37:175:37Waxing Crescent31Fri
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 4:33 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 100% 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 Full Moon (100% 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