Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

64°
H -°
L 59°
E
9mph
Low tide
9:44 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, September 19, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 5h 47m at 9:44 pm (1.0 ft)
Next high tide (tomorrow) : 3:01 am (2.1 ft)
Sunset today : 6:49 pm
Sunrise tomorrow : 6:31 am
Moon phase : First Quarter (58% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Featured Local Businesses

Champlins Marina Resort, docks filled on a sunny summer day

Champlin's Marina & Resort
New Harbor Great Salt Pond Block Island Aerial

New Shoreham (Block Island) Harbormaster
Coast Guard Station, Point Judith Rhode Island,

USCG Station Point Judith, RI
Beach in East Hampton, NY -- Nicole Mayone, CC BY-SA 2.0 , via Wikimedia Commons

East Hampton Harbormaster

Block Island, RI Tides - Feb 1859

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue6:432.86:542.412:090.01:020.07:015:06New Moon1Tue
2Wed7:162.87:282.512:46-0.11:35-0.27:005:07New Moon2Wed
3Thu7:472.98:002.61:21-0.22:03-0.26:595:09New Moon3Thu
4Fri8:172.98:332.71:54-0.22:26-0.36:585:10New Moon4Fri
5Sat8:472.89:062.72:26-0.12:48-0.36:575:11Waxing Crescent5Sat
6Sun9:212.79:422.72:58-0.13:12-0.36:565:12Waxing Crescent6Sun
7Mon9:592.510:222.73:330.03:43-0.26:555:14Waxing Crescent7Mon
8Tue10:422.411:072.74:140.14:20-0.26:545:15Waxing Crescent8Tue
9Wed11:312.211:582.75:030.25:06-0.16:525:16First Quarter9Wed
10Thu12:282.16:070.36:010.06:515:17First Quarter10Thu
11Fri12:572.71:322.17:420.37:070.06:505:19First Quarter11Fri
12Sat2:052.72:472.19:270.28:240.06:495:20Waxing Gibbous12Sat
13Sun3:242.94:022.310:320.09:49-0.26:485:21Waxing Gibbous13Sun
14Mon4:353.15:042.711:26-0.311:01-0.56:465:22Waxing Gibbous14Mon
15Tue5:333.45:593.012:15-0.56:455:24Waxing Gibbous15Tue
16Wed6:253.66:503.312:01-0.71:00-0.76:445:25Full Moon16Wed
17Thu7:143.67:383.512:56-0.81:41-0.86:425:26Full Moon17Thu
18Fri8:013.68:263.61:47-0.92:19-0.86:415:27Full Moon18Fri
19Sat8:463.49:123.52:34-0.82:53-0.76:395:28Waning Gibbous19Sat
20Sun9:303.19:583.43:20-0.63:24-0.66:385:30Waning Gibbous20Sun
21Mon10:162.710:463.14:06-0.33:54-0.36:375:31Waning Gibbous21Mon
22Tue11:032.411:362.84:570.04:28-0.16:355:32Third Quarter22Tue
23Wed11:532.16:020.35:080.26:345:33Third Quarter23Wed
24Thu12:312.512:481.97:180.56:000.46:325:34Third Quarter24Thu
25Fri1:342.31:551.88:340.67:120.56:315:36Third Quarter25Fri
26Sat2:542.23:181.89:400.69:190.56:295:37Waning Crescent26Sat
27Sun4:072.34:241.910:340.510:230.46:285:38Waning Crescent27Sun
28Mon5:002.45:122.111:180.311:110.36:265:39Waning Crescent28Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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 Block Island, RI Tides

Collapse All
Is this week a spring tide or neap tide in Block Island, RI?

Block Island, RI is currently in a neap phase. Tonight's moon is 58% 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 Block Island, RI 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 Block Island, RI?

Tide predictions for Block Island, RI 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 Block Island, RI?

Tide data for Block Island, RI is sourced from NOAA Station #8459338. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8459338.

What is the moon phase in Block Island, RI tonight?

Tonight the moon over Block Island, RI is First Quarter (58% illuminated). This places Block Island, RI 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

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