Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

44°
H 69°
L 53°
NNW
4mph
Low tide
11:07 am
Photo Credits

Tides Today & Tomorrow in Squamscott River, Great Bay, NH

TIDE TIMES for Tuesday, September 15, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide : in 5h 12m at 11:07 am (0.5 ft)
Next high tide : 4:58 pm (7.3 ft)
Sunset today : 6:54 pm
Sunrise tomorrow : 6:23 am
Moon phase : Waxing Crescent (21% illuminated)
Tide Station Location : Station #8422687
Common Questions About Tides

Featured Local Businesses

Great Bay Marine

Great Bay Marine
Maritime Boats by Chislett Marine

Maritime Boats
Marine Supplies

Hamilton Marine - Kittery, ME
An aerial view of Safe Harbor Kittery Point

Safe Harbor Kittery Point
Yarmouth Boat Yard is an authorized Pursuit Boats dealer

Yarmouth Boat Yard

Squamscott River, Great Bay, NH Tides - Aug 1945

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed7:457.28:157.71:540.02:140.05:348:05Third Quarter1Wed
2Thu8:496.99:157.72:560.03:130.35:358:04Third Quarter2Thu
3Fri9:566.810:187.84:030.04:160.45:368:03Waning Crescent3Fri
4Sat11:026.711:197.85:09-0.15:190.55:378:02Waning Crescent4Sat
5Sun12:026.86:11-0.26:180.55:388:00Waning Crescent5Sun
6Mon12:167.912:586.97:07-0.47:130.45:397:59New Moon6Mon
7Tue1:098.01:497.07:58-0.48:040.35:407:58New Moon7Tue
8Wed1:598.02:377.08:46-0.48:520.35:417:56New Moon8Wed
9Thu2:457.93:217.09:30-0.39:370.45:427:55New Moon9Thu
10Fri3:297.74:027.010:11-0.210:200.55:437:54Waxing Crescent10Fri
11Sat4:117.54:426.910:500.011:020.65:447:52Waxing Crescent11Sat
12Sun4:527.25:226.911:280.311:460.75:457:51Waxing Crescent12Sun
13Mon5:356.96:036.812:070.55:467:49Waxing Crescent13Mon
14Tue6:206.56:466.712:310.912:490.85:487:48First Quarter14Tue
15Wed7:096.27:316.61:191.01:321.15:497:46First Quarter15Wed
16Thu8:006.08:196.62:091.12:191.35:507:45First Quarter16Thu
17Fri8:555.89:116.63:031.23:101.45:517:43First Quarter17Fri
18Sat9:545.810:066.74:001.14:051.45:527:42Waxing Gibbous18Sat
19Sun10:515.911:007.04:580.95:011.35:537:40Waxing Gibbous19Sun
20Mon11:436.111:507.35:510.65:531.15:547:39Waxing Gibbous20Mon
21Tue12:316.46:390.36:420.75:557:37Waxing Gibbous21Tue
22Wed12:387.61:166.87:25-0.17:300.45:567:36Full Moon22Wed
23Thu1:257.92:017.18:09-0.48:170.05:577:34Full Moon23Thu
24Fri2:128.22:467.58:53-0.79:06-0.35:597:32Full Moon24Fri
25Sat2:598.33:317.89:38-0.89:55-0.56:007:31Waning Gibbous25Sat
26Sun3:478.34:178.010:24-0.910:45-0.66:017:29Waning Gibbous26Sun
27Mon4:378.15:068.011:11-0.711:39-0.66:027:27Waning Gibbous27Mon
28Tue5:317.85:588.012:02-0.56:037:26Third Quarter28Tue
29Wed6:297.56:557.912:36-0.412:57-0.16:047:24Third Quarter29Wed
30Thu7:327.17:557.71:37-0.21:550.26:057:22Third Quarter30Thu
31Fri8:386.88:597.62:420.02:580.56:067:21Third Quarter31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8422687)

www.USHarbors.com

© 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 Squamscott River, Great Bay, NH Tides

Collapse All
Is this week a spring tide or neap tide in Squamscott River, Great Bay, NH?

Squamscott River, Great Bay, NH 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 Squamscott River, Great Bay, NH 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 Squamscott River, Great Bay, NH?

Tide predictions for Squamscott River, Great Bay, NH 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 Squamscott River, Great Bay, NH?

Tide data for Squamscott River, Great Bay, NH is sourced from NOAA Station #8422687. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8422687.

What is the moon phase in Squamscott River, Great Bay, NH tonight?

Tonight the moon over Squamscott River, Great Bay, NH is Waxing Crescent (21% illuminated). This places Squamscott River, Great Bay, NH in a transitional tide cycle, so tidal ranges are shifting between spring and neap 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: Flickr.com.

Concrete Ships Hiding in Plain Sight: The Forgotten Breakwaters of America's Harbors

By Jordan Hanssen, best4boats. There's a good chance a concrete ship is lurking in your… More

Maritime History

Image Credits: Flickr.com.

Is Offshore Construction Noise Stressing New England's Lobsters? WHOI Scientists Want to Know

By Kiran Johnson, whoi.edu. As offshore wind farms multiply along the New England coast, a… More

Coastal LifeOcean AwarenessOcean Science

The future of fisheries-independent surveys will include traditional capture-based surveys as well as advanced technology such as acoustic, optical, and molecular tools deployed from survey vessels, uncrewed vehicles, and moored to the seafloor. Credit: NOAA Fisheries/Su Kim

Charting the Future of Fisheries-Independent Surveys

By fisheries.noaa.gov, fisheries.noaa.gov. Fisheries-independent surveys operate on dedicated survey vessels and are the foundation of… More

Ocean Science

Coastally-trapped Kelvin waves, a signature of El Niño, traveled north along the West Coast during the 1997/1998 El Niño, as shown in a map of sea surface height anomalies. Darker reds show sea levels higher than normal, while darker blues show heights below normal. Scientists are now watching for similar waves to move up the West Coast this fall. Credit: Dillon Amaya/North Carolina State University

Ocean Indicators We’re Tracking for El Niño’s Arrival on the West Coast

By fisheries.noaa.gov, fisheries.noaa.gov. Has El Niño reached the West Coast? You might think it has.… More

Coastal NewsExtreme WeatherOcean ScienceWeather & Tides

Docked fishing boats at Yaquina Bay, Newport, Oregon. Credit: iStock

Advancing Agency-Level Reforms to Restore American Seafood Competitiveness

By fisheries.noaa.gov, fisheries.noaa.gov. Over the past year, I have met with fishermen, processors, coastal community… More

Coastal NewsFishingFood

Image Credits: Wikimedia commons.

Coral IVF: How Scientists Are Breeding Heat-Resistant Reefs for Florida's Future

By Dawn Anderson, best4boats.com. The reefs that protect South Florida's coastlines, harbors, and marinas are… More

Ocean Science

The Sacramento River near the main spawning area of winter-run Chinook salmon blocked by dams from their original mountain spawning habitat. The Sundial Bridge in Redding rises in the background. Credit: Larisa Thacher/UC Davis Center for Watershed Sciences

A Secret to Survival for California’s Most Endangered Salmon

By fisheries.noaa.gov, fisheries.noaa.gov. Traditional field research combined with new technology has revealed a secret to… More

Coastal NewsEnvironment

A group of melon-headed whales swimming together on February 1, 2026, seen during the Winter Hawaiian Islands Cetacean and Ecosystem Assessment Survey. Credit: NOAA Fisheries/Mary Applegate, taken under NOAA permit

A Winter at Sea Reveals Seasonal Habits of Whales, Dolphins, and Seabirds in Hawaiʻi

By fisheries.noaa.gov, fisheries.noaa.gov. The Hawaiian archipelago is teeming with marine life, and winter brings some… More

Ocean Science

NOAA Autonomous Surface Vehicle in Narragansett Bay during testing. Goat Island and the Newport Bridge in the background.

Beyond Ocean Mapping: Using Uncrewed Vehicles to Advance Ocean Research

By fisheries.noaa.gov, fisheries.noaa.gov. It’s January off of Nantucket Shoals. An uncrewed surface vehicle begins a… More

Ocean Science

Your Privacy Choices