Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

65°
H 70°
L 65°
SW
6mph
High tide
11:48 am
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Wednesday, September 16, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 5:45 pm (0.7 ft)
Next high tide : in 2h 20m at 11:48 am (3.0 ft)
Sunset today : 6:54 pm
Sunrise tomorrow : 6:28 am
Moon phase : Waxing Crescent (30% 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 - Dec 1863

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue11:032.511:502.34:160.55:180.56:564:22Third Quarter1Tue
2Wed11:492.45:120.76:120.56:574:22Third Quarter2Wed
3Thu12:382.312:382.36:220.77:040.56:584:22Third Quarter3Thu
4Fri1:282.41:322.27:490.77:530.56:594:21Third Quarter4Fri
5Sat2:232.52:322.29:060.68:440.47:004:21Waning Crescent5Sat
6Sun3:202.83:352.310:040.49:330.27:014:21Waning Crescent6Sun
7Mon4:133.04:312.510:520.110:210.07:024:21Waning Crescent7Mon
8Tue5:013.35:212.711:38-0.111:07-0.27:034:21Waning Crescent8Tue
9Wed5:483.66:092.912:23-0.37:044:21New Moon9Wed
10Thu6:363.86:583.11:08-0.47:044:21New Moon10Thu
11Fri7:243.97:473.212:42-0.51:54-0.57:054:21New Moon11Fri
12Sat8:133.98:383.21:32-0.62:38-0.57:064:21Waxing Crescent12Sat
13Sun9:043.89:303.22:23-0.53:24-0.57:074:22Waxing Crescent13Sun
14Mon9:563.610:253.23:15-0.44:13-0.47:084:22Waxing Crescent14Mon
15Tue10:523.311:243.14:15-0.25:10-0.37:084:22Waxing Crescent15Tue
16Wed11:503.05:380.06:12-0.27:094:22First Quarter16Wed
17Thu12:243.112:492.87:080.17:13-0.17:104:23First Quarter17Thu
18Fri1:273.11:522.58:240.28:130.07:104:23First Quarter18Fri
19Sat2:333.02:592.49:300.29:110.07:114:23Waxing Gibbous19Sat
20Sun3:393.14:032.410:290.110:040.07:114:24Waxing Gibbous20Sun
21Mon4:373.14:582.511:200.110:510.07:124:24Waxing Gibbous21Mon
22Tue5:273.15:462.612:050.07:134:25Waxing Gibbous22Tue
23Wed6:123.26:312.612:47-0.17:134:25Full Moon23Wed
24Thu6:543.27:132.712:11-0.11:25-0.17:134:26Full Moon24Thu
25Fri7:323.17:532.712:47-0.11:59-0.17:144:26Full Moon25Fri
26Sat8:073.08:312.71:22-0.12:30-0.17:144:27Full Moon26Sat
27Sun8:402.99:082.61:570.02:58-0.17:154:28Waning Gibbous27Sun
28Mon9:132.89:452.52:330.03:230.07:154:28Waning Gibbous28Mon
29Tue9:472.610:232.43:100.13:500.17:154:29Waning Gibbous29Tue
30Wed10:242.511:042.43:500.34:220.27:154:30Waning Gibbous30Wed
31Thu11:062.311:492.44:360.45:010.27:154:31Third Quarter31Thu
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 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 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 Crescent (30% 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

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