Nearby Harbors
43.0783’ N, 70.7517’ W

Portsmouth, NH

67°
H 80°
L 59°
SW
2mph
High tide
9:49 am
Photo Credits

Tides Today & Tomorrow in Portsmouth, NH

TIDE TIMES for Monday, August 24, 2026
The tide is currently rising in Portsmouth, NH.
Next low tide : 3:34 pm (1.6 ft)
Next high tide : in 1h 52m at 9:49 am (6.7 ft)
Sunset today : 7:31 pm
Sunrise tomorrow : 5:58 am
Moon phase : Waxing Gibbous (88% illuminated)
Tide Station Location : Station #8423745
Common Questions About Tides

Featured Local Businesses

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
Great Bay Marine

Great Bay Marine

Portsmouth, NH Tides - Jun 2040

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri4:478.95:408.111:10-0.411:320.75:058:16Third Quarter1Fri
2Sat5:538.56:428.112:11-0.15:058:16Third Quarter2Sat
3Sun6:598.27:428.212:400.81:130.25:058:17Third Quarter3Sun
4Mon8:058.08:398.41:480.72:120.45:048:18Waning Crescent4Mon
5Tue9:077.89:328.62:520.53:080.55:048:19Waning Crescent5Tue
6Wed10:037.810:198.73:480.23:580.75:048:19Waning Crescent6Wed
7Thu10:547.711:038.74:380.04:440.85:038:20Waning Crescent7Thu
8Fri11:417.611:448.75:24-0.15:260.95:038:21New Moon8Fri
9Sat12:247.66:07-0.16:071.15:038:21New Moon9Sat
10Sun12:248.61:067.56:470.06:451.25:038:22New Moon10Sun
11Mon1:028.51:457.47:250.17:231.35:038:22New Moon11Mon
12Tue1:408.42:247.38:030.28:021.45:038:23Waxing Crescent12Tue
13Wed2:188.23:037.28:410.48:421.55:028:23Waxing Crescent13Wed
14Thu2:588.13:447.19:200.59:241.65:028:24Waxing Crescent14Thu
15Fri3:407.94:287.110:010.610:101.65:028:24Waxing Crescent15Fri
16Sat4:257.75:127.210:440.710:591.65:038:24First Quarter16Sat
17Sun5:147.65:567.411:280.811:511.55:038:25First Quarter17Sun
18Mon6:047.56:427.712:140.85:038:25First Quarter18Mon
19Tue6:587.47:308.012:441.31:030.85:038:25First Quarter19Tue
20Wed7:557.48:208.41:410.91:540.75:038:26Waxing Gibbous20Wed
21Thu8:537.69:118.92:380.52:470.65:038:26Waxing Gibbous21Thu
22Fri9:497.810:029.33:33-0.13:400.45:048:26Waxing Gibbous22Fri
23Sat10:448.010:539.74:26-0.54:320.25:048:26Full Moon23Sat
24Sun11:398.211:479.95:19-0.95:260.05:048:26Full Moon24Sun
25Mon12:348.46:13-1.26:20-0.15:058:26Full Moon25Mon
26Tue12:4210.01:298.57:07-1.37:15-0.15:058:26Waning Gibbous26Tue
27Wed1:3710.02:248.58:01-1.38:12-0.15:058:26Waning Gibbous27Wed
28Thu2:339.83:208.58:56-1.19:100.15:068:26Waning Gibbous28Thu
29Fri3:319.44:198.59:52-0.810:120.35:068:26Third Quarter29Fri
30Sat4:329.05:178.410:49-0.511:160.45:078:26Third Quarter30Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8423745)

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 Portsmouth, NH Tides

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

Portsmouth, NH is currently in a spring phase. Tonight's moon is 88% 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 Portsmouth, 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 Portsmouth, NH?

Tide predictions for Portsmouth, 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 Portsmouth, NH?

Tide data for Portsmouth, NH is sourced from NOAA Station #8423745. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8423745.

What is the moon phase in Portsmouth, NH tonight?

Tonight the moon over Portsmouth, NH is Waxing Gibbous (88% illuminated). This places Portsmouth, NH 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