Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

69°
H -°
L 47°
NW
9mph
Low tide
11:53 pm
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 4h 43m at 11:53 pm (1.3 ft)
Next high tide (tomorrow) : 6:07 am (6.9 ft)
Sunset today : 6:47 pm
Sunrise tomorrow : 6:26 am
Moon phase : First Quarter (48% illuminated)
Tide Station Location : Station #8419870
Common Questions About Tides

Featured Local Businesses

Marine Supplies

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

Safe Harbor Kittery Point
Maritime Boats by Chislett Marine

Maritime Boats
Great Bay Marine

Great Bay Marine

Seavey Island, NH Tides - Sep 1874

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue2:309.12:519.68:31-0.39:10-0.55:116:22Third Quarter1Tue
2Wed3:288.63:489.49:260.210:11-0.25:126:20Third Quarter2Wed
3Thu4:308.14:489.110:240.711:170.15:136:18Third Quarter3Thu
4Fri5:367.75:548.911:271.05:146:17Third Quarter4Fri
5Sat6:467.57:028.812:250.312:341.25:156:15Waning Crescent5Sat
6Sun7:537.58:068.81:320.41:401.25:166:13Waning Crescent6Sun
7Mon8:527.79:048.92:330.32:401.15:176:11Waning Crescent7Mon
8Tue9:437.99:548.93:260.23:330.95:186:10Waning Crescent8Tue
9Wed10:288.110:398.94:130.24:200.75:196:08New Moon9Wed
10Thu11:088.211:208.84:530.25:030.65:206:06New Moon10Thu
11Fri11:448.311:588.65:300.35:430.55:216:04New Moon11Fri
12Sat12:188.46:040.46:200.55:236:02New Moon12Sat
13Sun12:348.412:508.46:370.66:570.65:246:01Waxing Crescent13Sun
14Mon1:118.11:248.37:100.97:350.75:255:59Waxing Crescent14Mon
15Tue1:497.81:598.27:441.18:150.95:265:57Waxing Crescent15Tue
16Wed2:297.52:388.18:221.48:581.15:275:55Waxing Crescent16Wed
17Thu3:147.23:228.09:041.79:471.25:285:53First Quarter17Thu
18Fri4:046.94:127.99:521.910:411.35:295:52First Quarter18Fri
19Sat4:596.85:077.910:462.011:391.35:305:50First Quarter19Sat
20Sun5:596.86:078.011:452.05:315:48First Quarter20Sun
21Mon7:007.07:098.312:401.112:471.75:325:46Waxing Gibbous21Mon
22Tue7:577.48:088.71:390.81:471.35:345:44Waxing Gibbous22Tue
23Wed8:497.99:029.22:320.32:430.75:355:43Waxing Gibbous23Wed
24Thu9:378.69:539.63:21-0.23:360.05:365:41Full Moon24Thu
25Fri10:239.210:449.84:08-0.64:27-0.65:375:39Full Moon25Fri
26Sat11:099.711:349.84:53-0.85:17-1.05:385:37Full Moon26Sat
27Sun11:5510.05:39-0.96:08-1.35:395:35Waning Gibbous27Sun
28Mon12:259.712:4310.26:26-0.86:59-1.35:405:34Waning Gibbous28Mon
29Tue1:179.41:3310.17:15-0.57:53-1.05:415:32Waning Gibbous29Tue
30Wed2:128.92:279.88:070.08:51-0.65:435:30Waning Gibbous30Wed
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8419870)

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 Seavey Island, NH Tides

Collapse All
Is this week a spring tide or neap tide in Seavey Island, NH?

Seavey Island, NH is currently in a neap phase. Tonight's moon is 48% 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 Seavey Island, 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 Seavey Island, NH?

Tide predictions for Seavey Island, 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 Seavey Island, NH?

Tide data for Seavey Island, NH is sourced from NOAA Station #8419870. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8419870.

What is the moon phase in Seavey Island, NH tonight?

Tonight the moon over Seavey Island, NH is First Quarter (48% illuminated). This places Seavey Island, NH 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

Coastal Stories See All

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

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

Your Privacy Choices