Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

65°
H -°
L 58°
NE
14mph
High tide
5:00 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Monday, September 21, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 11:26 pm (0.7 ft)
Next high tide : in 42m at 5:00 pm (2.7 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

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 1857

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun12:033.112:292.46:430.16:06-0.27:015:07First Quarter1Sun
2Mon1:043.01:332.28:120.17:10-0.17:005:08First Quarter2Mon
3Tue2:122.92:462.19:280.18:320.06:595:09Waxing Gibbous3Tue
4Wed3:292.94:002.210:320.09:59-0.16:585:10Waxing Gibbous4Wed
5Thu4:383.05:022.411:27-0.111:04-0.26:575:12Waxing Gibbous5Thu
6Fri5:353.15:542.612:16-0.26:555:13Waxing Gibbous6Fri
7Sat6:253.16:422.81:00-0.36:545:14Full Moon7Sat
8Sun7:093.27:272.912:46-0.41:38-0.46:535:15Full Moon8Sun
9Mon7:493.18:092.91:27-0.42:11-0.46:525:17Full Moon9Mon
10Tue8:263.08:482.92:03-0.42:39-0.46:515:18Full Moon10Tue
11Wed9:002.99:252.82:36-0.33:01-0.36:495:19Waning Gibbous11Wed
12Thu9:332.710:002.73:07-0.13:21-0.26:485:20Waning Gibbous12Thu
13Fri10:062.410:352.63:400.03:46-0.16:475:22Waning Gibbous13Fri
14Sat10:422.211:122.54:180.24:170.16:465:23Waning Gibbous14Sat
15Sun11:212.011:522.35:020.34:550.26:445:24Third Quarter15Sun
16Mon12:071.85:580.55:410.46:435:25Third Quarter16Mon
17Tue12:392.21:001.77:200.66:370.56:425:27Third Quarter17Tue
18Wed1:382.22:061.79:080.67:440.56:405:28Third Quarter18Wed
19Thu2:572.33:281.710:140.49:090.46:395:29Waning Crescent19Thu
20Fri4:132.54:332.011:040.210:250.26:375:30Waning Crescent20Fri
21Sat5:062.75:222.311:470.011:20-0.16:365:31Waning Crescent21Sat
22Sun5:513.06:072.612:25-0.26:345:33Waning Crescent22Sun
23Mon6:343.26:513.012:09-0.41:00-0.46:335:34New Moon23Mon
24Tue7:163.47:353.212:57-0.61:33-0.66:315:35New Moon24Tue
25Wed7:593.48:203.51:43-0.72:06-0.76:305:36New Moon25Wed
26Thu8:443.39:063.62:29-0.72:40-0.86:285:37Waxing Crescent26Thu
27Fri9:303.19:533.53:15-0.63:16-0.76:275:38Waxing Crescent27Fri
28Sat10:192.910:453.44:06-0.43:56-0.56:255:40Waxing Crescent28Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
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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

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