Tides Today & Tomorrow in Merrimacport, MA

TIDE TIMES for Tuesday, September 15, 2026
The tide is currently falling in Merrimacport, MA.

Next low tide : in 3h 00m at 10:20 am (0.6 ft)
Next high tide : 4:04 pm (7.5 ft)
Sunset today : 6:54 pm
Sunrise tomorrow : 6:23 am
Moon phase : Waxing Crescent (21% illuminated)
Tide Station Location : Station #8440369
Common Questions About Tides

Merrimacport, MA Tides - Sep 2026

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Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Tue	3:54	7.3	4:17	7.8	10:29	0.4	11:02	0.2	6:08	7:18		1	Tue
2	Wed	4:44	7.1	5:08	7.9	11:16	0.5	11:57	0.2	6:09	7:17		2	Wed
3	Thu	5:38	6.8	6:02	7.9			12:09	0.7	6:11	7:15		3	Thu
4	Fri	6:34	6.6	6:59	7.8	12:55	0.3	1:07	0.8	6:12	7:13		4	Fri
5	Sat	7:33	6.4	7:59	7.8	1:56	0.3	2:08	0.9	6:13	7:11		5	Sat
6	Sun	8:35	6.2	9:01	7.8	2:58	0.3	3:10	0.8	6:14	7:10		6	Sun
7	Mon	9:39	6.3	10:04	7.8	3:58	0.2	4:11	0.6	6:15	7:08		7	Mon
8	Tue	10:39	6.5	11:02	7.9	4:55	0.0	5:08	0.4	6:16	7:06		8	Tue
9	Wed	11:34	6.7	11:56	7.9	5:48	-0.1	6:02	0.2	6:17	7:04		9	Wed
10	Thu			12:25	7.0	6:38	-0.2	6:55	0.0	6:18	7:03		10	Thu
11	Fri	12:47	7.8	1:13	7.3	7:26	-0.2	7:45	-0.1	6:19	7:01		11	Fri
12	Sat	1:34	7.6	1:57	7.4	8:11	-0.1	8:33	-0.1	6:20	6:59		12	Sat
13	Sun	2:19	7.4	2:39	7.5	8:54	0.1	9:19	0.0	6:21	6:57		13	Sun
14	Mon	3:02	7.2	3:21	7.6	9:37	0.3	10:05	0.1	6:22	6:56		14	Mon
15	Tue	3:45	6.9	4:04	7.5	10:20	0.6	10:53	0.3	6:23	6:54		15	Tue
16	Wed	4:31	6.6	4:50	7.3	11:06	0.9	11:42	0.6	6:25	6:52		16	Wed
17	Thu	5:18	6.3	5:38	7.2	11:55	1.1			6:26	6:50		17	Thu
18	Fri	6:08	6.1	6:29	7.0	12:34	0.8	12:47	1.4	6:27	6:48		18	Fri
19	Sat	7:00	5.9	7:23	6.8	1:28	1.0	1:41	1.5	6:28	6:47		19	Sat
20	Sun	7:55	5.7	8:18	6.8	2:23	1.1	2:37	1.5	6:29	6:45		20	Sun
21	Mon	8:51	5.7	9:15	6.8	3:19	1.1	3:32	1.4	6:30	6:43		21	Mon
22	Tue	9:47	5.9	10:09	6.9	4:12	1.0	4:25	1.2	6:31	6:41		22	Tue
23	Wed	10:38	6.1	10:58	7.0	5:00	0.8	5:14	1.0	6:32	6:39		23	Wed
24	Thu	11:25	6.5	11:45	7.2	5:46	0.6	6:01	0.8	6:33	6:38		24	Thu
25	Fri			12:09	6.8	6:30	0.5	6:48	0.5	6:34	6:36		25	Fri
26	Sat	12:30	7.3	12:52	7.2	7:12	0.4	7:33	0.3	6:35	6:34		26	Sat
27	Sun	1:15	7.4	1:36	7.6	7:54	0.3	8:18	0.0	6:36	6:32		27	Sun
28	Mon	2:00	7.4	2:19	7.9	8:34	0.3	9:03	-0.1	6:38	6:30		28	Mon
29	Tue	2:46	7.3	3:04	8.2	9:16	0.4	9:51	-0.2	6:39	6:29		29	Tue
30	Wed	3:33	7.2	3:52	8.2	10:01	0.5	10:43	-0.2	6:40	6:27		30	Wed
Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date

Tidal Data Source: (8440369)

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When is the lowest tide this week in Merrimacport, MA?

The lowest tide this week in Merrimacport, MA is 0.3 ft on Tuesday, Sep 15 at 10:53 pm.

When is the highest tide this week in Merrimacport, MA?

The highest tide this week in Merrimacport, MA is 7.5 ft on Tuesday, Sep 15 at 4:04 pm — worth noting for launching your boat and being alert for possible high tide flooding.

Is this week a spring tide or neap tide in Merrimacport, MA?

Merrimacport, MA is currently in a transitional phase. Tonight's moon is 21% 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 shifting between spring and neap.

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 time is high tide in Merrimacport, MA today?

High tides in Merrimacport, MA today: 3:45 am (6.9 ft), 4:04 pm (7.5 ft). The 4:04 pm high of 7.5 ft is notably higher than the other — known as diurnal inequality, common on coasts influenced by lunar declination.

What time is low tide in Merrimacport, MA today?

Low tides in Merrimacport, MA today: 10:20 am (0.6 ft), 10:53 pm (0.3 ft).

What is the tidal range in Merrimacport, MA today?

Today's tidal range in Merrimacport, MA is 7.1 ft — the difference between the day's highest and lowest water level. This month's average daily range is about 7.1 ft, so today's swing is typical.

What is the moon phase in Merrimacport, MA tonight?

Tonight the moon over Merrimacport, MA is Waxing Crescent (21% illuminated). This places Merrimacport, MA in a transitional tide cycle, so tidal ranges are shifting between spring and neap this week.

What type of tides does Merrimacport, MA have — semi-diurnal, diurnal, or mixed?

Merrimacport, MA has semi-diurnal tides — two high tides and two low tides roughly every 24 hours and 50 minutes, with similar heights.

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

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