Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Saturday, July 11, 2026
The tide is currently rising in Merrimacport, MA.
Next low tide (tomorrow) : 5:33 am (-0.2 ft)
Next high tide : in 3h 57m at 10:38 pm (8.3 ft)
Sunset today : 8:23 pm
Sunrise tomorrow : 5:16 am
Moon phase : Waning Crescent (11% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Apr 2070

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:537.35:216.511:480.56:247:10Waning Gibbous1Tue
2Wed5:427.26:116.312:031.012:380.66:237:11Third Quarter2Wed
3Thu6:327.17:026.212:541.11:300.76:217:12Third Quarter3Thu
4Fri7:247.07:566.21:471.22:240.86:197:13Third Quarter4Fri
5Sat8:196.98:516.32:421.23:180.76:177:15Third Quarter5Sat
6Sun9:147.09:456.53:371.04:100.66:167:16Waning Crescent6Sun
7Mon10:087.110:376.94:300.84:590.46:147:17Waning Crescent7Mon
8Tue11:007.311:277.35:200.45:470.26:127:18Waning Crescent8Tue
9Wed11:517.56:100.16:340.06:117:19New Moon9Wed
10Thu12:157.712:417.77:00-0.37:21-0.26:097:20New Moon10Thu
11Fri1:048.11:317.87:49-0.68:08-0.36:077:21New Moon11Fri
12Sat1:528.52:217.88:38-0.88:55-0.36:067:23New Moon12Sat
13Sun2:418.73:117.79:28-0.99:44-0.36:047:24Waxing Crescent13Sun
14Mon3:318.74:027.610:21-0.910:36-0.26:027:25Waxing Crescent14Mon
15Tue4:248.64:577.311:15-0.711:320.06:017:26Waxing Crescent15Tue
16Wed5:198.45:537.112:11-0.55:597:27First Quarter16Wed
17Thu6:168.16:506.912:290.21:08-0.35:577:28First Quarter17Thu
18Fri7:137.77:496.81:280.32:05-0.15:567:29First Quarter18Fri
19Sat8:137.48:496.82:270.43:020.05:547:31Waxing Gibbous19Sat
20Sun9:137.29:476.83:260.43:570.15:537:32Waxing Gibbous20Sun
21Mon10:107.010:407.04:220.44:490.25:517:33Waxing Gibbous21Mon
22Tue11:036.911:277.15:150.35:370.25:507:34Waxing Gibbous22Tue
23Wed11:506.86:040.26:240.35:487:35Full Moon23Wed
24Thu12:117.212:346.76:520.27:090.45:477:36Full Moon24Thu
25Fri12:527.31:166.77:370.17:520.55:457:38Full Moon25Fri
26Sat1:337.41:586.78:210.18:340.65:447:39Full Moon26Sat
27Sun2:137.52:396.79:040.29:160.85:427:40Waning Gibbous27Sun
28Mon2:547.63:216.79:470.39:580.95:417:41Waning Gibbous28Mon
29Tue3:377.54:056.610:310.410:431.05:397:42Waning Gibbous29Tue
30Wed4:227.54:526.511:180.511:311.25:387:43Waning Gibbous30Wed
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 2:05 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 11% 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 Waning Crescent (11% 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