Nearby Harbors
43.0533’ N, 70.9133’ W

Squamscott River, Great Bay, NH

53°
H -°
L 50°
NNE
5mph
Low tide
5:16 am
Photo Credits

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

TIDE TIMES for Monday, September 21, 2026
The tide is currently falling in Squamscott River, Great Bay, NH.
Next low tide (tomorrow) : in 6h 15m at 5:16 am (1.0 ft)
Next high tide (tomorrow) : 11:06 am (6.0 ft)
Sunset today : 6:43 pm
Sunrise tomorrow : 6:30 am
Moon phase : Waxing Gibbous (75% 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 1935

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu3:107.43:416.89:510.19:570.75:338:06Waxing Crescent1Thu
2Fri3:477.24:166.810:240.210:350.85:348:05Waxing Crescent2Fri
3Sat4:237.04:506.810:570.411:130.85:358:03Waxing Crescent3Sat
4Sun5:016.85:256.811:310.511:530.95:368:02Waxing Crescent4Sun
5Mon5:406.56:036.812:080.75:378:01First Quarter5Mon
6Tue6:246.36:456.812:370.912:480.95:388:00First Quarter6Tue
7Wed7:126.07:306.81:241.01:331.15:397:58First Quarter7Wed
8Thu8:045.98:216.82:151.02:221.25:407:57First Quarter8Thu
9Fri9:015.89:177.03:111.03:161.35:417:56Waxing Gibbous9Fri
10Sat10:035.910:177.24:120.84:161.25:437:54Waxing Gibbous10Sat
11Sun11:046.111:177.65:130.55:170.95:447:53Waxing Gibbous11Sun
12Mon12:016.56:100.16:150.55:457:52Waxing Gibbous12Mon
13Tue12:128.012:536.97:02-0.37:090.15:467:50Full Moon13Tue
14Wed1:068.31:447.47:52-0.78:03-0.35:477:49Full Moon14Wed
15Thu1:598.52:347.88:41-1.08:57-0.75:487:47Full Moon15Thu
16Fri2:518.63:238.19:29-1.19:50-0.85:497:46Waning Gibbous16Fri
17Sat3:438.54:128.310:18-1.010:43-0.95:507:44Waning Gibbous17Sat
18Sun4:368.25:028.311:07-0.811:38-0.75:517:43Waning Gibbous18Sun
19Mon5:317.85:568.111:59-0.45:527:41Third Quarter19Mon
20Tue6:307.36:537.912:37-0.512:540.05:537:40Third Quarter20Tue
21Wed7:336.97:547.61:39-0.11:530.55:557:38Third Quarter21Wed
22Thu8:376.58:577.32:440.22:550.85:567:37Third Quarter22Thu
23Fri9:446.310:027.23:510.44:011.05:577:35Waning Crescent23Fri
24Sat10:496.211:047.24:580.45:071.15:587:33Waning Crescent24Sat
25Sun11:466.311:587.25:570.46:041.05:597:32Waning Crescent25Sun
26Mon12:356.46:480.36:540.86:007:30Waning Crescent26Mon
27Tue12:467.31:196.67:320.37:380.76:017:28New Moon27Tue
28Wed1:297.31:596.78:110.28:180.66:027:27New Moon28Wed
29Thu2:097.32:346.98:460.28:560.56:037:25New Moon29Thu
30Fri2:457.23:087.09:180.39:310.56:047:23New Moon30Fri
31Sat3:217.13:397.09:490.410:060.56:067:22Waxing Crescent31Sat
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 75% 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 Gibbous (75% 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

Sablefish farmed in net pens at NOAA's Northwest Fisheries Science Center. Credit: Megan Ewald for NOAA Fisheries.

Managing Genetic Risk in Offshore Aquaculture

By fisheries.noaa.gov, fisheries.noaa.gov. Aquaculture can sustainably produce seafood to complement wild-caught fisheries. However, like all… More

FishingFoodScience

Deep-sea sponges and other invertebrates in a collection basket during a bottom trawl survey. Credit: NOAA Fisheries

Nine Species of Deep-Sea Sponges Discovered in Alaska

By fisheries.noaa.gov, fisheries.noaa.gov. Scientists have discovered nine new species of sponges in the Gulf of… More

Ocean Science

Sugar Creek flows over a dam initially created with beaver dam analogues to help improve habitat for coho salmon and other wildlife. Photo courtesy of Scott River Watershed Council.

Start-Up Beaver Dams Transform Parched California Creeks into Salmon Havens, New Research Finds

By fisheries.noaa.gov, fisheries.noaa.gov. Battered by early gold mining and diminished by logging and diversions,the lower… More

Coastal News

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

Your Privacy Choices