Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Monday, August 10, 2026
The tide is currently rising in Merrimacport, MA.
Next low tide : 5:23 pm (0.4 ft)
Next high tide : in 3h 43m at 10:54 am (6.4 ft)
Sunset today : 7:53 pm
Sunrise tomorrow : 5:45 am
Moon phase : Waning Crescent (6% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Apr 1952

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue4:517.25:225.911:470.65:256:09First Quarter1Tue
2Wed5:436.96:155.712:001.212:410.85:236:11First Quarter2Wed
3Thu6:376.77:105.712:551.41:361.05:226:12First Quarter3Thu
4Fri7:336.68:065.71:511.42:311.05:206:13Waxing Gibbous4Fri
5Sat8:306.69:005.92:471.33:220.95:186:14Waxing Gibbous5Sat
6Sun9:226.69:506.23:391.14:100.85:166:15Waxing Gibbous6Sun
7Mon10:116.710:356.54:280.94:550.75:156:16Waxing Gibbous7Mon
8Tue10:566.811:186.95:150.75:380.65:136:17Full Moon8Tue
9Wed11:416.96:010.56:200.65:116:19Full Moon9Wed
10Thu12:007.212:256.96:450.27:000.65:106:20Full Moon10Thu
11Fri12:427.61:096.97:290.17:400.65:086:21Full Moon11Fri
12Sat1:257.81:536.98:13-0.18:210.65:066:22Waning Gibbous12Sat
13Sun2:098.02:406.89:00-0.19:060.75:056:23Waning Gibbous13Sun
14Mon2:578.13:316.79:50-0.19:560.85:036:24Waning Gibbous14Mon
15Tue3:498.14:256.610:450.010:530.95:016:26Third Quarter15Tue
16Wed4:458.05:226.511:420.111:540.95:006:27Third Quarter16Wed
17Thu5:437.86:216.512:410.14:586:28Third Quarter17Thu
18Fri6:447.77:226.612:560.81:400.14:576:29Third Quarter18Fri
19Sat7:467.58:236.81:590.72:370.04:556:30Waning Crescent19Sat
20Sun8:477.49:217.12:590.43:320.04:536:31Waning Crescent20Sun
21Mon9:457.310:147.43:560.24:220.04:526:32Waning Crescent21Mon
22Tue10:397.211:037.74:50-0.15:110.04:506:34New Moon22Tue
23Wed11:297.111:497.95:42-0.25:590.14:496:35New Moon23Wed
24Thu12:166.96:31-0.36:440.24:476:36New Moon24Thu
25Fri12:338.01:016.87:19-0.37:290.44:466:37New Moon25Fri
26Sat1:167.91:456.68:04-0.28:130.64:446:38Waxing Crescent26Sat
27Sun1:597.83:286.49:500.09:580.95:437:39Waxing Crescent27Sun
28Mon3:437.74:136.310:370.310:451.15:417:40Waxing Crescent28Mon
29Tue4:297.55:016.111:260.511:351.35:407:42Waxing Crescent29Tue
30Wed5:187.25:516.012:160.75:397:43First Quarter30Wed
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 2:08 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 spring phase. Tonight's moon is 6% 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 (6% 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