Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

61°
H -°
L 58°
NE
15mph
Low tide
11:26 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Monday, September 21, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 4h 34m at 11:26 pm (0.7 ft)
Next high tide (tomorrow) : 5:15 am (2.4 ft)
Sunset today : 6:45 pm
Sunrise tomorrow : 6:33 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Featured Local Businesses

New Harbor Great Salt Pond Block Island Aerial

New Shoreham (Block Island) Harbormaster
Champlins Marina Resort, docks filled on a sunny summer day

Champlin's Marina & Resort
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 - Nov 1856

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:073.19:312.52:200.33:170.46:224:45Waxing Crescent1Sat
2Sun9:503.010:182.42:580.43:580.56:234:44Waxing Crescent2Sun
3Mon10:412.911:132.33:420.54:520.66:244:43Waxing Crescent3Mon
4Tue11:382.84:350.66:110.76:254:42First Quarter4Tue
5Wed12:142.412:412.85:430.77:350.66:264:41First Quarter5Wed
6Thu1:182.51:452.97:090.68:350.46:284:40First Quarter6Thu
7Fri2:242.72:532.98:470.59:250.16:294:38Waxing Gibbous7Fri
8Sat3:293.13:563.19:590.210:09-0.16:304:37Waxing Gibbous8Sat
9Sun4:263.54:513.210:56-0.110:52-0.36:314:36Waxing Gibbous9Sun
10Mon5:173.85:433.311:49-0.311:34-0.56:324:35Waxing Gibbous10Mon
11Tue6:064.16:333.312:41-0.56:344:34Full Moon11Tue
12Wed6:554.27:233.312:17-0.51:31-0.56:354:33Full Moon12Wed
13Thu7:444.28:133.21:02-0.52:21-0.46:364:33Full Moon13Thu
14Fri8:344.09:033.11:47-0.43:10-0.36:374:32Waning Gibbous14Fri
15Sat9:253.79:552.92:33-0.24:040.06:394:31Waning Gibbous15Sat
16Sun10:193.310:522.73:200.05:070.26:404:30Waning Gibbous16Sun
17Mon11:193.011:532.54:130.36:160.46:414:29Third Quarter17Mon
18Tue12:212.75:300.57:180.56:424:28Third Quarter18Tue
19Wed12:562.51:222.57:100.78:130.56:434:28Third Quarter19Wed
20Thu1:592.52:242.48:220.79:000.56:444:27Third Quarter20Thu
21Fri3:002.63:232.49:220.69:400.56:464:26Waning Crescent21Fri
22Sat3:542.74:122.410:110.510:140.46:474:26Waning Crescent22Sat
23Sun4:392.94:542.410:540.410:430.36:484:25Waning Crescent23Sun
24Mon5:163.05:302.411:330.311:110.26:494:25Waning Crescent24Mon
25Tue5:503.16:042.512:110.26:504:24New Moon25Tue
26Wed6:233.26:382.512:490.16:514:24New Moon26Wed
27Thu6:563.37:142.612:120.11:250.06:524:23New Moon27Thu
28Fri7:313.37:512.612:470.12:000.16:534:23New Moon28Fri
29Sat8:093.28:312.51:240.12:330.16:554:23Waxing Crescent29Sat
30Sun8:503.29:142.52:030.13:080.26:564:22Waxing Crescent30Sun
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 transitional phase. Tonight's moon is 75% 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 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 Waxing Gibbous (75% illuminated). This places Block Island, RI 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

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