Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

59°
H -°
L 58°
SE
5mph
High tide
11:21 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Tuesday, September 15, 2026
The tide is currently rising in Block Island, RI.
Next low tide (tomorrow) : 4:40 am (0.4 ft)
Next high tide : in 1h 58m at 11:21 pm (2.7 ft)
Sunset today : 6:55 pm
Sunrise tomorrow : 6:27 am
Moon phase : Waxing Crescent (21% 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 - Jan 1865

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:513.410:203.13:12-0.43:55-0.57:164:32Waxing Crescent1Sun
2Mon10:443.211:163.14:07-0.34:43-0.47:164:33Waxing Crescent2Mon
3Tue11:412.95:17-0.15:40-0.37:164:34First Quarter3Tue
4Wed12:153.112:402.76:540.16:44-0.27:164:35First Quarter4Wed
5Thu1:173.01:442.58:170.17:54-0.17:164:36First Quarter5Thu
6Fri2:243.02:532.49:270.09:05-0.17:164:37Waxing Gibbous6Fri
7Sat3:343.14:002.510:280.010:07-0.27:164:38Waxing Gibbous7Sat
8Sun4:363.14:592.611:21-0.111:01-0.27:154:39Waxing Gibbous8Sun
9Mon5:303.25:502.712:10-0.27:154:40Waxing Gibbous9Mon
10Tue6:183.26:382.812:54-0.37:154:41Full Moon10Tue
11Wed7:023.27:222.912:32-0.31:33-0.37:154:42Full Moon11Wed
12Thu7:433.28:042.91:11-0.32:08-0.37:144:43Full Moon12Thu
13Fri8:203.18:442.81:46-0.32:39-0.37:144:44Full Moon13Fri
14Sat8:552.99:222.72:18-0.23:05-0.27:144:45Waning Gibbous14Sat
15Sun9:292.810:002.62:51-0.13:27-0.17:134:46Waning Gibbous15Sun
16Mon10:042.610:382.53:270.03:540.07:134:47Waning Gibbous16Mon
17Tue10:412.411:182.44:070.24:280.17:124:48Waning Gibbous17Tue
18Wed11:222.24:530.35:080.27:124:50Third Quarter18Wed
19Thu12:012.312:072.05:500.55:550.37:114:51Third Quarter19Thu
20Fri12:482.312:581.97:020.56:490.37:114:52Third Quarter20Fri
21Sat1:422.31:581.98:410.57:490.37:104:53Third Quarter21Sat
22Sun2:462.43:082.09:510.38:580.27:094:54Waning Crescent22Sun
23Mon3:522.64:132.210:440.110:050.07:084:56Waning Crescent23Mon
24Tue4:482.95:082.411:30-0.111:01-0.37:084:57Waning Crescent24Tue
25Wed5:373.25:572.712:13-0.47:074:58Waning Crescent25Wed
26Thu6:243.46:453.012:55-0.67:064:59New Moon26Thu
27Fri7:113.67:333.212:42-0.71:35-0.77:055:01New Moon27Fri
28Sat7:583.78:213.41:32-0.82:14-0.87:045:02New Moon28Sat
29Sun8:463.69:103.52:21-0.82:53-0.87:045:03Waxing Crescent29Sun
30Mon9:353.410:013.43:10-0.73:33-0.87:035:04Waxing Crescent30Mon
31Tue10:263.210:553.34:04-0.54:17-0.67:025:06Waxing Crescent31Tue
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 21% 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 (21% 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