Tides Today & Tomorrow in Merrimack River Entrance, MA

TIDE TIMES for Sunday, October 18, 2026
The tide is currently rising in Merrimack River Entrance, MA.

Next low tide : 11:34 am (1.9 ft)
Next high tide : in 2h 49m at 5:33 am (6.7 ft)
Sunset today : 5:56 pm
Sunrise tomorrow : 7:00 am
Moon phase : First Quarter (50% illuminated)
Tide Station Location : Station #8440452
Common Questions About Tides

Featured Local Businesses

Maritime Boats

Yarmouth Boat Yard

Merrimack River Entrance, MA Tides - Dec 1817

< Nov 1817

Print this Tide Chart

Jan 1818 >

Date		High Tide				Low Tide				Sun		Moon	Date
Date		AM	ft	PM	ft	AM	ft	PM	ft	Rise	Set	Moon	Date
1	Mon	4:33	7.2	4:45	7.9	10:37	1.4	11:12	0.5	6:58	4:14		1	Mon
2	Tue	5:27	7.5	5:44	7.8	11:36	1.2			6:59	4:14		2	Tue
3	Wed	6:22	7.9	6:44	7.9	12:06	0.4	12:36	0.8	7:00	4:14		3	Wed
4	Thu	7:17	8.4	7:43	8.0	1:01	0.3	1:35	0.3	7:01	4:13		4	Thu
5	Fri	8:09	8.9	8:40	8.2	1:54	0.2	2:32	-0.3	7:02	4:13		5	Fri
6	Sat	9:00	9.4	9:34	8.3	2:46	0.0	3:26	-0.8	7:03	4:13		6	Sat
7	Sun	9:51	9.9	10:27	8.4	3:36	-0.1	4:19	-1.2	7:04	4:13		7	Sun
8	Mon	10:41	10.1	11:20	8.4	4:27	-0.2	5:11	-1.4	7:05	4:13		8	Mon
9	Tue	11:32	10.2			5:18	-0.2	6:02	-1.5	7:06	4:13		9	Tue
10	Wed	12:11	8.4	12:24	10.1	6:09	-0.2	6:54	-1.4	7:07	4:13		10	Wed
11	Thu	1:03	8.3	1:16	9.8	7:02	0.0	7:45	-1.1	7:08	4:13		11	Thu
12	Fri	1:55	8.2	2:09	9.4	7:55	0.2	8:38	-0.8	7:09	4:13		12	Fri
13	Sat	2:50	8.0	3:04	8.9	8:52	0.5	9:32	-0.4	7:09	4:13		13	Sat
14	Sun	3:45	7.8	4:01	8.4	9:51	0.7	10:27	0.0	7:10	4:13		14	Sun
15	Mon	4:42	7.8	4:59	7.9	10:51	0.9	11:22	0.3	7:11	4:14		15	Mon
16	Tue	5:38	7.7	5:58	7.6	11:51	1.0			7:12	4:14		16	Tue
17	Wed	6:33	7.8	6:56	7.3	12:16	0.6	12:51	0.9	7:12	4:14		17	Wed
18	Thu	7:25	7.9	7:52	7.1	1:09	0.8	1:48	0.8	7:13	4:15		18	Thu
19	Fri	8:14	8.0	8:44	7.0	1:59	1.0	2:39	0.7	7:13	4:15		19	Fri
20	Sat	8:59	8.1	9:31	7.0	2:46	1.1	3:26	0.5	7:14	4:15		20	Sat
21	Sun	9:42	8.2	10:15	7.0	3:30	1.2	4:09	0.4	7:15	4:16		21	Sun
22	Mon	10:22	8.3	10:56	7.0	4:11	1.2	4:51	0.3	7:15	4:16		22	Mon
23	Tue	11:02	8.3	11:37	7.1	4:52	1.2	5:31	0.2	7:16	4:17		23	Tue
24	Wed	11:42	8.4			5:32	1.2	6:10	0.1	7:16	4:17		24	Wed
25	Thu	12:17	7.1	12:21	8.4	6:12	1.2	6:50	0.0	7:16	4:18		25	Thu
26	Fri	12:57	7.2	1:02	8.4	6:53	1.1	7:31	0.0	7:17	4:19		26	Fri
27	Sat	1:39	7.3	1:45	8.4	7:36	1.1	8:14	0.0	7:17	4:19		27	Sat
28	Sun	2:24	7.4	2:32	8.3	8:23	1.0	8:59	0.0	7:17	4:20		28	Sun
29	Mon	3:11	7.5	3:23	8.2	9:14	1.0	9:48	0.1	7:17	4:21		29	Mon
30	Tue	4:01	7.7	4:17	8.0	10:10	0.8	10:38	0.2	7:18	4:22		30	Tue
31	Wed	4:54	8.0	5:15	7.8	11:08	0.6	11:29	0.3	7:18	4:22		31	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: (8440452)

www.USHarbors.com

The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
Any commercial use, modification, redistribution, or repackaging without written permission is strictly prohibited.

Is this week a spring tide or neap tide in Merrimack River Entrance, MA?

Merrimack River Entrance, MA is currently in a neap phase. Tonight's moon is 50% 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 minimum.

What datum are Merrimack River Entrance, 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 Merrimack River Entrance, MA?

Tide predictions for Merrimack River Entrance, 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 Merrimack River Entrance, MA?

Tide data for Merrimack River Entrance, MA is sourced from NOAA Station #8440452. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8440452.

What is the moon phase in Merrimack River Entrance, MA tonight?

Tonight the moon over Merrimack River Entrance, MA is First Quarter (50% illuminated). This places Merrimack River Entrance, MA in a neap tide cycle, so tidal ranges are near their weekly minimum 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

Quietly Sophisticated: The Hood 42 LM

By US Harbors At first glance, the Hood 42 LM might be confused for a boat that worked the Maine coast fifty years ago, but upon further inspection, the fifteen coats of Epifanes varnish over mahogany and custom-cast bronze hardware reveal that this boat was built for cruising. Beyond the… Learn More