Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

53°
H -°
L 48°
NE
6mph
Low tide
9:02 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Sunday, October 18, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 4h 17m at 9:02 pm (0.9 ft)
Next high tide (tomorrow) : 2:19 am (2.1 ft)
Sunset today : 6:01 pm
Sunrise tomorrow : 7:01 am
Moon phase : First Quarter (50% 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 - Oct 1803

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat7:104.27:373.712:46-0.51:33-0.55:465:34Full Moon1Sat
2Sun7:584.38:253.61:26-0.52:24-0.45:475:32Waning Gibbous2Sun
3Mon8:474.29:153.32:07-0.43:15-0.35:485:30Waning Gibbous3Mon
4Tue9:384.010:083.12:50-0.34:130.05:495:29Waning Gibbous4Tue
5Wed10:343.711:062.93:360.05:250.35:505:27Waning Gibbous5Wed
6Thu11:373.44:300.36:440.55:515:25Third Quarter6Thu
7Fri12:102.712:463.15:470.57:540.65:525:24Third Quarter7Fri
8Sat1:172.61:582.97:360.68:570.65:535:22Third Quarter8Sat
9Sun2:272.63:092.88:540.69:500.65:545:20Waning Crescent9Sun
10Mon3:332.74:082.89:550.610:330.55:555:19Waning Crescent10Mon
11Tue4:282.94:542.910:440.511:090.45:565:17Waning Crescent11Tue
12Wed5:133.15:342.911:250.411:400.35:575:16Waning Crescent12Wed
13Thu5:523.26:082.912:020.35:585:14New Moon13Thu
14Fri6:283.36:412.912:050.212:360.26:005:12New Moon14Fri
15Sat7:003.47:122.912:280.21:090.26:015:11New Moon15Sat
16Sun7:303.47:432.812:520.21:400.26:025:09New Moon16Sun
17Mon8:013.38:162.81:190.22:110.26:035:08New Moon17Mon
18Tue8:333.28:522.61:500.32:420.36:045:06Waxing Crescent18Tue
19Wed9:093.19:312.52:230.43:160.56:055:05Waxing Crescent19Wed
20Thu9:503.010:152.43:000.53:550.66:065:03Waxing Crescent20Thu
21Fri10:382.911:082.33:410.64:460.76:075:02Waxing Crescent21Fri
22Sat11:342.84:310.76:010.86:095:00First Quarter22Sat
23Sun12:072.312:352.85:350.87:330.76:104:59First Quarter23Sun
24Mon1:102.41:402.86:560.78:350.56:114:57First Quarter24Mon
25Tue2:172.72:473.08:310.69:250.36:124:56Waxing Gibbous25Tue
26Wed3:233.03:503.19:490.310:080.06:134:55Waxing Gibbous26Wed
27Thu4:203.44:463.310:470.010:50-0.26:144:53Waxing Gibbous27Thu
28Fri5:113.85:383.411:40-0.311:31-0.46:164:52Waxing Gibbous28Fri
29Sat6:004.16:283.512:32-0.46:174:51Full Moon29Sat
30Sun6:494.37:173.512:14-0.51:23-0.56:184:49Full Moon30Sun
31Mon7:384.38:073.412:59-0.52:13-0.56:194:48Full Moon31Mon
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 50% 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 (50% 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

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

By noaa.gov, noaa.gov. NOAA’s U.S. Winter Outlook, released today, shows how El Nino will likely influence the… More

Coastal NewsWeather & Tides

Archival photo of New England swordfishing vessel (left) courtesy of NOAA Fisheries; Background photo and photo offloading fish (right) courtesy of Hawaii Longline Association/Eric Kingma

Highly Migratory Species Management: Managing Shared Resources at Home and Around the World

By fisheries.noaa.gov, fisheries.noaa.gov. Highly migratory species—like Atlantic yellowfin tuna, Pacific albacore, and Atlantic swordfish—travel thousands of miles across… More

Coastal NewsOcean Science

A freediver from the Papahānaumokuākea Marine Debris Project works to carefully remove a ghost net from the reef at Kamokuokamohoali‘i (Maro Reef) in Hawaii. (Image credit: Andrew Sullivan-Hawkins/Papahānaumokuākea Marine Debris Project (Under permit # PMNM-2024-003))

Large-scale Marine Debris: 4 Ways to Clean up the Big Stuff

By fisheries.noaa.gov, fisheries.noaa.gov. Marine debris is a challenging problem. Across the country, NOAA and partners… More

Coastal NewsOcean Science

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

By fisheries.noaa.gov, fisheries.noaa.gov. You may be hearing a lot about Kelvin waves in the news.… More

Coastal NewsOcean ScienceWeather & Tides

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?

By fisheries.noaa.gov, fisheries.noaa.gov. What does El Niño mean for U.S. fisheries and marine life? What… More

Coastal NewsOcean ScienceWeather & Tides

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.

By fisheries.noaa.gov, fisheries.noaa.gov. NOAA’s National Weather Service announced today that Flood Inundation Mapping (FIM), a… More

Coastal NewsWeather & Tides

Image Credits: Noaa fisheries.

Meet Hawaii Fish Company, Tilapia Farmers in Hawaiʻi

By fisheries.noaa.gov, fisheries.noaa.gov. For husband and wife duo Ron and and Estralita Weidenbach, fish farming… More

Coastal LifeMarine Economy

NOAA Fisheries and Sea Quester Farms partnered up to evaluate if kelp farms provide habitat for marine life in Alaska. Pictured here is one of Sea Quester’s farms in southeast Alaska near Juneau. Credit: Hatch Blue, Alaska Mariculture Cluster

Kelp Farms and Marine Life Co-Exist in Southeast Alaska

By fisheries.noaa.gov, fisheries.noaa.gov. Marine aquaculture, or mariculture, provides economic opportunities for coastal communities in Alaska… More

Coastal LifeOcean Science

Image Credits: Noaa Fisheries.

Celebrate National Seafood Month

By fisheries.noaa.gov, fisheries.noaa.gov. As we welcome autumn, we also celebrate National Seafood Month! Join us… More

Coastal LifeCoastal News

Your Privacy Choices