US Harbors | Tide Charts, Marine Forecast, Coastal Flooding

US Harbors is the #1 Source for Tide Charts and Coastal Information for over 1,400 harbors in 30 coastal states. Our curated data helps you plan smarter, enjoy your time on the water, and stay ahead of rapidly changing tides, storms, and flooding.

Tide Charts

US Harbors illustrates tide forecasts with our simple, intuitive charts. Easily scan the highs and lows online or print a convenient monthly tide chart for the boat or office.

Weather

US Harbors delivers weather predictions with a focus on marine forecasts, buoy data, weather alerts, and onshore forecasts for harbors near you that include wind speed and direction, relative humidity, and more.

High Tide Flooding

Each month, we publish a high-tide flooding report for forecasted harbors across the country. Look for harbors near you to know when extreme high tides could cause flooding. Sign up for our newsletter to be alerted to new high tide flooding reports.

Latest Coastal News Filter

A car drives through a snowstorm in Broomfield, Colorado, in 2024. (Image credit: Bob Hyatt/NOAA)

El Nino looms large over U.S. Winter Outlook

10/17/2026

By noaa.gov, noaa.gov. NOAA’s U.S. Winter Outlook, released today, shows how El Nino will likely influence the upcoming winter months (December 2026 to February 2027), with warmer-than-average temperatures expected across the northern U.S.; wetter-than-average conditions likely across the southern U.S., from California to Florida, and along the Eastern Seaboard; and drought improving… SEE MORE

Map showing sea surface height anomalies using Darker reds to show sea levels higher than normal, while darker blues show heights below normal

Kelvin Waves, Explained

10/11/2026

By fisheries.noaa.gov, fisheries.noaa.gov. You may be hearing a lot about Kelvin waves in the news. What are Kelvin waves, and how are they related to El Niño? We asked oceanographer Michael Jacox, from the Southwest Fisheries Science Center and NOAA Physical Sciences Laboratory, to explain the phenomenon. What is a Kelvin wave and… SEE MORE

Southern Resident killer whales swim just off Seattle’s shore. NOAA experts anticipate that the West Coast and the Pacific Islands will feel the effects of the 2026–2027 El Niño event most directly. Credit: NOAA Northwest Fisheries Science Center; taken under NOAA permit #781-1824

How Will El Niño Affect Your Local Fisheries?

10/10/2026

By fisheries.noaa.gov, fisheries.noaa.gov. What does El Niño mean for U.S. fisheries and marine life? What can fishermen and coastal communities expect to observe and experience as this event continues and potentially intensifies? And what are scientists at NOAA Fisheries doing to track this natural phenomenon? The El Niño-Southern Oscillation is a powerful… SEE MORE

Quietly Sophisticated: The Hood 42 LM

By US Harbors At first glance, the Hood 42 LM might be confused for a boat that worked the Maine coast fifty years ago, but upon further inspection, the fifteen coats of Epifanes varnish over mahogany and custom-cast bronze hardware reveal that this boat was built for cruising. Beyond the… Learn More

NOAA's flood inundation map (left) depicting the forecast for flooding extent in New London, Wisconsin, and a photo of flooded streets in New London (right), dated April 17, 2026. (Image credit: NOAA NWS)

NOAA’s flood mapping tool now covers nearly 100% of U.S.

10/7/2026

By fisheries.noaa.gov, fisheries.noaa.gov. NOAA’s National Weather Service announced today that Flood Inundation Mapping (FIM), a revolutionary tool for predicting river flooding, is now available on an experimental basis to nearly 100% of the U.S. population. This is a massive expansion from FIM’s prior coverage of 60% of the country. FIM… SEE MORE

Hurricane tracks on a map, compared to another map with no tracks

A Hurricane Season Without Hurricanes, So Far

9/29/2026

Weather & Tides

By US Harbors Every Atlantic hurricane season from 1915 through 2025 produced at least one hurricane by September 21, and most produced about four. This year has produced none. Tropical Storm Hanna, the season’s eighth named storm, formed this week far east of Bermuda and is expected to stay a… SEE MORE

Large waves crash over a jetty as a large coastal storm bears down on the region on March 2, 2018 in Scituate, Massachusetts. A powerful nor'easter is bringing snow, rain and high wind to much of the U.S. Northeast. (Image credit: Scott Eisen/Getty Images)

Weekend nor’easter likely to bring damaging winds, coastal flooding

9/26/2026

By noaa.gov, noaa.gov. Forecasters at NOAA’s National Weather Service (NWS) are monitoring a powerful nor’easter bringing damaging wind gusts and dangerous coastal flooding to the Northeast this weekend. The New York City metro area and New Jersey may be especially impacted by this storm. A rapidly deepening storm along the… SEE MORE

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 Help Track El Niño’s Arrival on the West Coast

9/5/2026

By fisheries.noaa.gov, fisheries.noaa.gov. Has El Niño reached the West Coast? You might think it has. After all, the ocean off Southern and Central California is unusually warm. But that is from a recent marine heatwave predates the current El Niño. Much of the Pacific Coast is experiencing relatively normal conditions while still… SEE MORE

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

8/13/2026

Weather & Tides

By noaa.gov, noaa.gov. It may be surprising, but two of the hurricanes that swirled in the Pacific last week began their journeys thousands of miles away off the western coast of Africa. Both Hurricanes Fausto and Genevieve developed from tropical waves, which are areas of disturbed weather that rolled off… SEE MORE

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Who Is US Harbors?

We are a community of boaters, fishermen, surfers, scientists, waterfront homeowners, along with mariners and coastal professionals who work and live by the water. It is the project of a committed team who understand how conditions influence work and play on the coast because we live by the tides just like you. Our home port is Camden, Maine, one of over 1,400 harbors we serve.

Built For People Who Live By The Tides