Nearby Harbors
42.8188’ N, 70.8100’ W

Merrimack River Entrance, MA

67°
H -°
L 64°
S
4mph
Low tide
3:30 am
Photo Credits

Tides Today & Tomorrow in Merrimack River Entrance, MA

TIDE TIMES for Sunday, August 23, 2026
The tide is currently falling in Merrimack River Entrance, MA.
Next low tide (tomorrow) : in 4h 03m at 3:30 am (1.0 ft)
Next high tide (tomorrow) : 9:35 am (6.7 ft)
Sunset today : 7:33 pm
Sunrise tomorrow : 5:58 am
Moon phase : Waxing Gibbous (81% illuminated)
Tide Station Location : Station #8440452
Common Questions About Tides

Featured Local Businesses

Yarmouth Boat Yard is an authorized Pursuit Boats dealer

Yarmouth Boat Yard
Maritime Boats by Chislett Marine

Maritime Boats

Merrimack River Entrance, MA Tides - Nov 2130

Print this Tide Chart

We're sorry. There is no tidal information for this month. Please check back later.

© 2026 US Harbors LLC All rights reserved

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.

Common Questions About Merrimack River Entrance, MA Tides

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

Merrimack River Entrance, MA is currently in a spring phase. Tonight's moon is 81% 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 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 Waxing Gibbous (81% illuminated). This places Merrimack River Entrance, 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

Coastal Stories See All

Image Credits: fisheries.noaa.gov.

Technology Week: Launching into the Future with Advanced Technologies

By fisheries.noaa.gov, fisheries.noaa.gov. NOAA scientists rely on cutting-edge technology to collect and analyze the data… More

Ocean Science

Rhyl Frith prepares to catch the FreeFly Astro research drone on the R/V Nancy Foster while tagging whales. Taken under NOAA permit # 27066. Credit: Julia Zeh

Giving North Atlantic Right Whales a Check-Up Using Advanced Technology

By fisheries.noaa.gov, fisheries.noaa.gov. This story is part three of a three-part series. Read about how… More

Ocean Science

Image Credits: Fisheries.noaa.gov.

The Unexpected Catch: Friendship at Sea

By fisheries.noaa.gov, fisheries.noaa.gov. One Random Room Assignment When I graduated from college and entered the… More

Fishing

Members of the monitoring show off adult salmon captured at a monitoring station. From left to right, Kevin Vandenack holds a steelhead, Katherine Stonecypher holds a coho salmon, and Bryan Crouch holds a Chinook salmon. Credit: Katherine Stonecypher/Cal Poly Humboldt

Can Habitat Restoration Help Salmon Recover? Prairie Creek Offers Clues

By fisheries.noaa.gov, fisheries.noaa.gov. This story is part 2 of a 2-part series. Read part 1. When… More

Coastal NewsEnvironment

Prairie Creek project partners gather at the restoration site before construction begins. Credit: Michael Weir/CalTrout

Restoring California’s Prairie Creek Supports Salmon Recovery and Local Community

By fisheries.noaa.gov, fisheries.noaa.gov. This story is part 1 of a 2-part series. Read part 1.… More

Coastal NewsEnvironment

A researcher in a U.S. Coast Guard helicopter first spotted the entangled humpback anchored to the bottom about 20 miles off the Oregon Coast. The whale’s white pectoral flipper extends underwater to the lower left, while white baleen outlines its open lower jaw at bottom right. The entanglement left the whale’s mouth stretched permanently open, making it unable to feed. Photo collected in partnership with Oregon Coast Aquarium, Oregon State University Marine Mammal Institute and Cascadia Research Collective.

Fishing Vessel Joins Trained Team to Free Injured Humpback Whale 20 Miles off Oregon Coast

By fisheries.noaa.gov, fisheries.noaa.gov. An Oregon team joined by experts from Washington and a local fisherman… More

Coastal NewsOcean Awareness

NOAA's GOES West satellite captured this image of three tropical cyclones — Hurricanes Fausto and Genevieve and Typhoon Dolphin — swirling simultaneously in the Pacific Ocean. The image was taken on Tuesday, July 27, at 3:30 PM PDT/ 22:30 UTC. None of the three tropical cyclones made landfall in the United States. Fausto contributed to high surf conditions in Hawaii, and Genevieve also brought high surf to southern California. Typhoon Dolphin continued its track west toward Asia. (Image credit: NOAA Satellites)

Pacific Hurricanes Fausto and Genevieve actually had origins near Africa

By noaa.gov, noaa.gov. It may be surprising, but two of the hurricanes that swirled in… More

Extreme WeatherHurricanesWeather & Tides

Pacific capelin with unknown maturity. Scientists make microscopic observations to determine if capelin spawn only once or if they are capable of spawning over multiple years. Credit: NOAA Fisheries

NOAA Scientists Discover Repeat Spawning in Pacific Capelin

By fisheries.noaa.gov, fisheries.noaa.gov. For certain fish species, like Pacific salmon, reproduction is a once-in-a-lifetime event, known… More

Ocean AwarenessOcean Science

Enforcement officer inventories shark fins. Credit: NOAA Fisheries

NOAA Fisheries Enforcement Officers Deploy for High Seas Patrols Combatting Illegal, Unreported, and Unregulated Fishing

By fisheries.noaa.gov, fisheries.noaa.gov. Enforcement officers from NOAA Fisheries’ Office of Law Enforcement have successfully wrapped up deployments… More

Fishing

Your Privacy Choices