Nearby Harbors
43.0785’ N, 70.7253’ W

Seavey Island, NH

54°
H 76°
L 61°
SW
2mph
Low tide
9:29 am
Photo Credits

Tides Today & Tomorrow in Seavey Island, NH

TIDE TIMES for Wednesday, September 16, 2026
The tide is currently falling in Seavey Island, NH.
Next low tide : in 4h 51m at 9:29 am (1.1 ft)
Next high tide : 3:45 pm (8.5 ft)
Sunset today : 6:51 pm
Sunrise tomorrow : 6:23 am
Moon phase : Waxing Crescent (30% 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 - Oct 1877

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon5:287.25:428.611:201.45:445:28Third Quarter1Mon
2Tue6:347.56:518.812:140.512:281.15:455:26Waning Crescent2Tue
3Wed7:388.07:569.11:170.31:350.65:465:24Waning Crescent3Wed
4Thu8:358.68:569.42:16-0.12:370.05:475:22Waning Crescent4Thu
5Fri9:279.29:519.63:09-0.43:33-0.55:495:21New Moon5Fri
6Sat10:169.710:449.63:59-0.74:26-1.05:505:19New Moon6Sat
7Sun11:0310.011:359.54:47-0.75:18-1.25:515:17New Moon7Sun
8Mon11:5110.15:34-0.56:08-1.25:525:16Waxing Crescent8Mon
9Tue12:269.212:389.96:21-0.26:57-0.95:535:14Waxing Crescent9Tue
10Wed1:168.81:269.67:080.27:49-0.55:545:12Waxing Crescent10Wed
11Thu2:088.32:169.27:580.78:420.05:565:10Waxing Crescent11Thu
12Fri3:027.83:108.78:501.29:390.55:575:09First Quarter12Fri
13Sat4:007.44:088.39:481.610:390.95:585:07First Quarter13Sat
14Sun5:007.25:098.010:491.811:401.15:595:05First Quarter14Sun
15Mon6:007.16:117.811:511.96:005:04First Quarter15Mon
16Tue6:577.27:107.812:381.212:521.86:025:02Waxing Gibbous16Tue
17Wed7:497.58:037.91:321.21:481.66:035:01Waxing Gibbous17Wed
18Thu8:347.88:508.02:181.12:371.26:044:59Waxing Gibbous18Thu
19Fri9:148.19:338.12:591.03:200.96:054:57Waxing Gibbous19Fri
20Sat9:508.410:138.13:360.94:000.66:074:56Full Moon20Sat
21Sun10:248.610:518.14:100.84:370.36:084:54Full Moon21Sun
22Mon10:588.811:288.14:440.85:140.16:094:53Full Moon22Mon
23Tue11:328.95:180.85:510.06:104:51Full Moon23Tue
24Wed12:078.012:089.05:550.96:300.06:114:50Waning Gibbous24Wed
25Thu12:477.812:489.06:341.07:130.06:134:48Waning Gibbous25Thu
26Fri1:307.71:329.07:161.18:000.16:144:47Waning Gibbous26Fri
27Sat2:187.52:228.98:051.28:520.36:154:45Waning Gibbous27Sat
28Sun3:127.43:198.79:001.39:500.46:174:44Third Quarter28Sun
29Mon4:127.54:228.610:021.310:510.46:184:43Third Quarter29Mon
30Tue5:147.65:288.611:091.211:530.36:194:41Third Quarter30Tue
31Wed6:178.06:368.612:170.96:204:40Waning Crescent31Wed
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 transitional phase. Tonight's moon is 30% 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 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 Waxing Crescent (30% illuminated). This places Seavey Island, 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