Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

61°
H -°
L 58°
SE
3mph
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 3h 24m 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 - Mar 1865

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed10:083.210:343.53:58-0.63:51-0.66:245:41Waxing Crescent1Wed
2Thu11:022.911:313.25:02-0.34:39-0.46:225:42Waxing Crescent2Thu
3Fri12:002.66:20-0.15:37-0.16:215:43First Quarter3Fri
4Sat12:323.01:022.47:350.16:590.16:195:44First Quarter4Sat
5Sun1:392.72:112.38:450.28:310.26:175:45First Quarter5Sun
6Mon2:552.63:232.39:480.29:440.26:165:47Waxing Gibbous6Mon
7Tue4:042.64:252.410:410.210:400.16:145:48Waxing Gibbous7Tue
8Wed4:592.65:162.611:250.111:270.16:135:49Waxing Gibbous8Wed
9Thu5:442.76:002.712:040.06:115:50Waxing Gibbous9Thu
10Fri6:232.86:402.912:070.012:38-0.16:095:51Full Moon10Fri
11Sat6:582.87:163.012:43-0.11:08-0.26:085:52Full Moon11Sat
12Sun7:302.87:493.01:16-0.21:33-0.26:065:53Full Moon12Sun
13Mon8:012.88:203.01:47-0.21:54-0.26:045:54Full Moon13Mon
14Tue8:312.78:512.92:16-0.22:17-0.26:035:55Waning Gibbous14Tue
15Wed9:032.69:232.82:46-0.12:44-0.16:015:57Waning Gibbous15Wed
16Thu9:382.59:592.83:180.03:150.05:595:58Waning Gibbous16Thu
17Fri10:172.410:402.73:530.13:520.15:585:59Waning Gibbous17Fri
18Sat11:032.211:282.64:360.34:350.25:566:00Third Quarter18Sat
19Sun11:542.25:290.45:280.35:546:01Third Quarter19Sun
20Mon12:232.612:532.26:360.46:310.35:536:02Third Quarter20Mon
21Tue1:252.61:592.38:070.47:470.35:516:03Third Quarter21Tue
22Wed2:362.73:112.59:280.29:170.15:496:04Waning Crescent22Wed
23Thu3:472.94:162.810:24-0.110:33-0.25:486:05Waning Crescent23Thu
24Fri4:483.25:133.211:11-0.411:31-0.55:466:06Waning Crescent24Fri
25Sat5:413.46:043.611:55-0.65:446:07New Moon25Sat
26Sun6:323.66:543.912:25-0.712:39-0.85:436:08New Moon26Sun
27Mon7:213.67:434.01:18-0.91:22-0.95:416:09New Moon27Mon
28Tue8:103.68:324.02:08-0.92:04-0.95:396:11New Moon28Tue
29Wed9:003.49:213.92:57-0.82:45-0.75:376:12Waxing Crescent29Wed
30Thu9:503.210:133.63:49-0.63:28-0.55:366:13Waxing Crescent30Thu
31Fri10:442.911:093.34:48-0.34:15-0.25:346:14Waxing Crescent31Fri
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 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

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