Massachusetts tide station

Merrimacport tide times

Today, Sunday, October 18, 2026: high tide at 6:28 AM (5.9 ft) and 6:47 PM (6.9 ft); low tide at 12:55 AM (0.9 ft) and 1:07 PM (1.6 ft). Water temperature 54.7 F at buoy SEIM1 (22 mi away).

NOAA station 8440369 · Reference station · MLLW datum · times in EDT · sunrise 7:01 AM, sunset 5:57 PM · first quarter (51% lit)

Low tide▼

12:55AM

0.9FT MLLW

low

High tide▲

6:28AM

5.9FT MLLW

high

Low tide▼

1:07PM

1.6FT MLLW

low

High tide▲

6:47PM

6.9FT MLLW

high

predicted height above MLLWnightnow (build time; your browser updates it)

As of 5:20 AM the tide is rising toward high tide at 6:28 AM (5.9 ft).

First Quarter 51% litSunrise 7:01 AMSunset 5:57 PMDaylight 10h 55mEDT

High tide at Merrimacport, Massachusetts on October 18, 2026 is at 6:28 AM (5.9 ft above MLLW) and 6:47 PM (6.9 ft above MLLW).
Low tide at Merrimacport on October 18, 2026 is at 12:55 AM (0.9 ft) and 1:07 PM (1.6 ft).
Today's tidal range at Merrimacport is 6.0 ft (highest high 6.9 ft, lowest low 0.9 ft).
The nearest NOAA water temperature to Merrimacport is 54.7 F at buoy SEIM1 (22 mi away), as of October 18, 2026.
Sunrise 7:01 AM, sunset 5:57 PM (EDT); moon first quarter, 51% illuminated.
Predictions are NOAA CO-OPS tide predictions for station 8440369 (harmonic reference station), heights above MLLW.

Next 7 days at Merrimacport

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Sun Oct 18today	12:55 AM0.9 ft	6:28 AM5.9 ft	1:07 PM1.6 ft	6:47 PM6.9 ft	7:01 AM	5:57 PM	51%
Mon Oct 19	1:48 AM1.0 ft	7:22 AM5.9 ft	2:02 PM1.6 ft	7:42 PM6.8 ft	7:02 AM	5:55 PM	61%
Tue Oct 20	2:42 AM1.0 ft	8:16 AM6.0 ft	2:59 PM1.5 ft	8:37 PM6.8 ft	7:04 AM	5:54 PM	71%
Wed Oct 21	3:35 AM0.9 ft	9:11 AM6.2 ft	3:53 PM1.2 ft	9:32 PM6.8 ft	7:05 AM	5:52 PM	80%
Thu Oct 22	4:24 AM0.8 ft	10:03 AM6.5 ft	4:44 PM0.9 ft	10:24 PM6.9 ft	7:06 AM	5:51 PM	88%
Fri Oct 23	5:09 AM0.6 ft	10:51 AM6.9 ft	5:33 PM0.6 ft	11:13 PM7.0 ft	7:07 AM	5:49 PM	94%
Sat Oct 24	5:54 AM0.5 ft	11:37 AM7.3 ft	6:20 PM0.3 ft		7:08 AM	5:48 PM	98%

Water temperature near Merrimacport

54.7 F (12.6 C)

NDBC buoy SEIM1 (8419870 - Seavey Island, ME), 22 mi away, observed 08:48 UTC October 18, 2026

Water temperature is the nearest NOAA reading to Merrimacport, not a measurement at the tide gauge itself (this station has no water-temperature sensor). See water temperature by state for every sensor and buoy.

Tide tables

High (▲) and low (▼) tides in EDT with sunrise, sunset and moon illumination. CSV of today's tides for every Massachusetts station.

October 2026 tide table

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Thu Oct 1					6:42 AM	6:26 PM	72%
Fri Oct 2					6:43 AM	6:24 PM	62%
Sat Oct 3					6:44 AM	6:22 PM	52%
Sun Oct 4					6:45 AM	6:20 PM	41%
Mon Oct 5					6:46 AM	6:19 PM	31%
Tue Oct 6					6:47 AM	6:17 PM	22%
Wed Oct 7					6:48 AM	6:15 PM	14%
Thu Oct 8					6:49 AM	6:13 PM	7%
Fri Oct 9					6:51 AM	6:12 PM	3%
Sat Oct 10					6:52 AM	6:10 PM	0%
Sun Oct 11					6:53 AM	6:08 PM	0%
Mon Oct 12					6:54 AM	6:07 PM	2%
Tue Oct 13					6:55 AM	6:05 PM	7%
Wed Oct 14					6:56 AM	6:03 PM	13%
Thu Oct 15					6:58 AM	6:02 PM	21%
Fri Oct 16	4:46 AM6.2 ft	11:21 AM1.4 ft	5:03 PM7.2 ft		6:59 AM	6:00 PM	30%
Sat Oct 17	12:02 AM0.8 ft	5:36 AM6.0 ft	12:13 PM1.5 ft	5:54 PM7.0 ft	7:00 AM	5:59 PM	40%
Sun Oct 18today	12:55 AM0.9 ft	6:28 AM5.9 ft	1:07 PM1.6 ft	6:47 PM6.9 ft	7:01 AM	5:57 PM	51%
Mon Oct 19	1:48 AM1.0 ft	7:22 AM5.9 ft	2:02 PM1.6 ft	7:42 PM6.8 ft	7:02 AM	5:55 PM	61%
Tue Oct 20	2:42 AM1.0 ft	8:16 AM6.0 ft	2:59 PM1.5 ft	8:37 PM6.8 ft	7:04 AM	5:54 PM	71%
Wed Oct 21	3:35 AM0.9 ft	9:11 AM6.2 ft	3:53 PM1.2 ft	9:32 PM6.8 ft	7:05 AM	5:52 PM	80%
Thu Oct 22	4:24 AM0.8 ft	10:03 AM6.5 ft	4:44 PM0.9 ft	10:24 PM6.9 ft	7:06 AM	5:51 PM	88%
Fri Oct 23	5:09 AM0.6 ft	10:51 AM6.9 ft	5:33 PM0.6 ft	11:13 PM7.0 ft	7:07 AM	5:49 PM	94%
Sat Oct 24	5:54 AM0.5 ft	11:37 AM7.3 ft	6:20 PM0.3 ft		7:08 AM	5:48 PM	98%
Sun Oct 25	12:01 AM7.1 ft	6:37 AM0.4 ft	12:22 PM7.8 ft	7:08 PM-0.1 ft	7:10 AM	5:46 PM	100%
Mon Oct 26	12:49 AM7.2 ft	7:21 AM0.4 ft	1:07 PM8.1 ft	7:55 PM-0.3 ft	7:11 AM	5:45 PM	99%
Tue Oct 27	1:37 AM7.2 ft	8:05 AM0.3 ft	1:54 PM8.4 ft	8:43 PM-0.5 ft	7:12 AM	5:43 PM	97%
Wed Oct 28	2:25 AM7.1 ft	8:51 AM0.3 ft	2:42 PM8.6 ft	9:33 PM-0.5 ft	7:13 AM	5:42 PM	92%
Thu Oct 29	3:14 AM7.0 ft	9:39 AM0.4 ft	3:32 PM8.6 ft	10:25 PM-0.5 ft	7:15 AM	5:41 PM	85%
Fri Oct 30	4:07 AM6.8 ft	10:33 AM0.5 ft	4:25 PM8.4 ft	11:21 PM-0.3 ft	7:16 AM	5:39 PM	77%
Sat Oct 31	5:02 AM6.7 ft	11:31 AM0.7 ft	5:22 PM8.2 ft		7:17 AM	5:38 PM	68%

November 2026 tide table

Date	Tide 1	Tide 2	Tide 3	Tide 4	Sunrise	Sunset	Moon
Sun Nov 1	12:19 AM-0.1 ft	5:01 AM6.5 ft	11:32 AM0.7 ft	5:21 PM7.9 ft	6:18 AM	4:36 PM	57%
Mon Nov 2	12:17 AM-0.0 ft	6:00 AM6.5 ft	12:34 PM0.7 ft	6:22 PM7.6 ft	6:20 AM	4:35 PM	46%
Tue Nov 3	1:15 AM0.1 ft	7:01 AM6.6 ft	1:36 PM0.7 ft	7:23 PM7.3 ft	6:21 AM	4:34 PM	36%
Wed Nov 4	2:11 AM0.2 ft	8:02 AM6.7 ft	2:36 PM0.6 ft	8:25 PM7.0 ft	6:22 AM	4:33 PM	26%
Thu Nov 5	3:05 AM0.2 ft	8:59 AM7.0 ft	3:33 PM0.4 ft	9:22 PM6.8 ft	6:24 AM	4:31 PM	17%
Fri Nov 6	3:55 AM0.3 ft	9:50 AM7.2 ft	4:25 PM0.2 ft	10:14 PM6.7 ft	6:25 AM	4:30 PM	10%
Sat Nov 7	4:42 AM0.3 ft	10:36 AM7.4 ft	5:15 PM0.1 ft	11:01 PM6.6 ft	6:26 AM	4:29 PM	5%
Sun Nov 8	5:28 AM0.5 ft	11:19 AM7.5 ft	6:02 PM0.1 ft	11:45 PM6.4 ft	6:27 AM	4:28 PM	1%
Mon Nov 9	6:12 AM0.6 ft	12:00 PM7.6 ft	6:47 PM0.1 ft		6:29 AM	4:27 PM	0%
Tue Nov 10	12:27 AM6.3 ft	6:55 AM0.8 ft	12:40 PM7.6 ft	7:31 PM0.1 ft	6:30 AM	4:26 PM	1%
Wed Nov 11	1:09 AM6.3 ft	7:37 AM0.9 ft	1:21 PM7.6 ft	8:14 PM0.2 ft	6:31 AM	4:25 PM	4%
Thu Nov 12	1:50 AM6.2 ft	8:19 AM1.1 ft	2:02 PM7.5 ft	8:58 PM0.4 ft	6:32 AM	4:24 PM	10%
Fri Nov 13	2:32 AM6.1 ft	9:03 AM1.2 ft	2:46 PM7.4 ft	9:44 PM0.5 ft	6:34 AM	4:23 PM	17%
Sat Nov 14	3:18 AM6.1 ft	9:50 AM1.4 ft	3:32 PM7.2 ft	10:32 PM0.7 ft	6:35 AM	4:22 PM	25%
Sun Nov 15	4:06 AM6.0 ft	10:40 AM1.5 ft	4:22 PM7.1 ft	11:22 PM0.8 ft	6:36 AM	4:21 PM	35%
Mon Nov 16	4:57 AM6.0 ft	11:33 AM1.5 ft	5:13 PM7.0 ft		6:38 AM	4:20 PM	45%
Tue Nov 17	12:12 AM0.8 ft	5:49 AM6.1 ft	12:28 PM1.5 ft	6:06 PM6.8 ft	6:39 AM	4:19 PM	56%
Wed Nov 18	1:03 AM0.8 ft	6:41 AM6.2 ft	1:23 PM1.4 ft	6:59 PM6.7 ft	6:40 AM	4:18 PM	66%
Thu Nov 19	1:54 AM0.8 ft	7:34 AM6.5 ft	2:19 PM1.1 ft	7:54 PM6.7 ft	6:41 AM	4:17 PM	76%
Fri Nov 20	2:44 AM0.7 ft	8:26 AM6.8 ft	3:13 PM0.8 ft	8:49 PM6.7 ft	6:42 AM	4:17 PM	84%
Sat Nov 21	3:31 AM0.6 ft	9:16 AM7.3 ft	4:04 PM0.4 ft	9:42 PM6.7 ft	6:44 AM	4:16 PM	91%
Sun Nov 22	4:18 AM0.5 ft	10:05 AM7.7 ft	4:54 PM0.0 ft	10:33 PM6.8 ft	6:45 AM	4:15 PM	96%
Mon Nov 23	5:04 AM0.4 ft	10:53 AM8.1 ft	5:44 PM-0.3 ft	11:24 PM6.8 ft	6:46 AM	4:15 PM	99%
Tue Nov 24	5:51 AM0.4 ft	11:42 AM8.4 ft	6:35 PM-0.6 ft		6:47 AM	4:14 PM	100%
Wed Nov 25	12:15 AM6.9 ft	6:40 AM0.3 ft	12:32 PM8.7 ft	7:25 PM-0.7 ft	6:48 AM	4:14 PM	98%
Thu Nov 26	1:06 AM6.9 ft	7:30 AM0.2 ft	1:23 PM8.7 ft	8:16 PM-0.8 ft	6:50 AM	4:13 PM	95%
Fri Nov 27	1:57 AM6.8 ft	8:21 AM0.2 ft	2:14 PM8.7 ft	9:08 PM-0.7 ft	6:51 AM	4:12 PM	89%
Sat Nov 28	2:50 AM6.8 ft	9:16 AM0.3 ft	3:08 PM8.5 ft	10:02 PM-0.6 ft	6:52 AM	4:12 PM	81%
Sun Nov 29	3:45 AM6.7 ft	10:14 AM0.4 ft	4:04 PM8.1 ft	10:57 PM-0.4 ft	6:53 AM	4:12 PM	73%
Mon Nov 30	4:42 AM6.7 ft	11:14 AM0.5 ft	5:02 PM7.7 ft	11:52 PM-0.2 ft	6:54 AM	4:11 PM	63%

Tidal datums at Merrimacport

Heights on this page are above mean lower low water (MLLW), the chart datum. NOAA's accepted datums for station 8440369, in feet above MLLW:

MHHW

8.13 ft

Mean higher high water

MHW

7.69 ft

Mean high water

MSL

4.21 ft

Mean sea level

MLW

0.64 ft

Mean low water

7.05 ft

Mean range

7.66 ft

Diurnal range

Nearby tide stations

Salisbury Point4.2 mi · next high 6:08 AM
Riverside4.8 mi · next high 7:04 AM
Newburyport5.9 mi · next high 5:35 AM
Plum Island, Merrimack River Entrance8.5 mi · next high 5:33 AM
Hampton Harbor9.9 mi · next high 5:31 AM
Plum Island Sound (south end)13 mi · next high 5:30 AM

Questions

What time is high tide at Merrimacport today?

High tide at Merrimacport, Massachusetts on Sunday, October 18, 2026 is at 6:28 AM (5.9 ft above MLLW) and 6:47 PM (6.9 ft above MLLW), NOAA prediction, local time.

What time is low tide at Merrimacport today?

Low tide at Merrimacport on Sunday, October 18, 2026 is at 12:55 AM (0.9 ft) and 1:07 PM (1.6 ft).

What is the water temperature at Merrimacport?

The nearest NOAA water-temperature reading to Merrimacport is 54.7 F at buoy SEIM1 (22 mi away), as of October 18, 2026.

Not for navigation. Predictions do not include weather; wind and pressure can move the real water level by a foot or more. Source: NOAA CO-OPS station 8440369.