Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

62°
H 66°
L 59°
NE
15mph
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 4h 16m 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 - Jun 1857

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon2:412.43:212.89:000.59:470.64:197:16Waxing Gibbous1Mon
2Tue3:372.34:122.99:360.510:350.64:187:17Waxing Gibbous2Tue
3Wed4:282.34:563.010:080.511:180.54:187:17Waxing Gibbous3Wed
4Thu5:112.35:353.110:410.411:590.44:187:18Waxing Gibbous4Thu
5Fri5:512.46:113.211:150.44:177:19Full Moon5Fri
6Sat6:292.56:473.212:400.311:53 AM0.34:177:19Full Moon6Sat
7Sun7:062.57:233.21:200.312:330.34:177:20Full Moon7Sun
8Mon7:442.58:013.21:590.21:130.34:177:21Full Moon8Mon
9Tue8:232.68:403.22:350.31:530.34:167:21Full Moon9Tue
10Wed9:042.69:213.13:100.32:340.44:167:22Waning Gibbous10Wed
11Thu9:482.610:053.13:440.33:160.44:167:22Waning Gibbous11Thu
12Fri10:372.610:533.04:220.34:050.54:167:23Waning Gibbous12Fri
13Sat11:282.711:442.95:060.35:030.64:167:23Third Quarter13Sat
14Sun12:222.95:550.36:140.64:167:24Third Quarter14Sun
15Mon12:382.81:173.06:450.27:360.54:167:24Third Quarter15Mon
16Tue1:362.82:163.27:370.19:000.44:167:24Third Quarter16Tue
17Wed2:412.73:193.58:320.010:090.24:167:25Waning Crescent17Wed
18Thu3:482.84:203.79:300.011:090.04:167:25Waning Crescent18Thu
19Fri4:502.95:173.910:28-0.14:167:25Waning Crescent19Fri
20Sat5:483.06:124.012:06-0.111:24 AM-0.24:167:26New Moon20Sat
21Sun6:423.17:064.01:01-0.212:21-0.34:177:26New Moon21Sun
22Mon7:353.27:594.01:53-0.31:17-0.24:177:26New Moon22Mon
23Tue8:273.28:503.82:42-0.22:11-0.24:177:26Waxing Crescent23Tue
24Wed9:183.29:403.63:29-0.13:020.04:177:26Waxing Crescent24Wed
25Thu10:103.110:293.34:160.03:540.24:187:26Waxing Crescent25Thu
26Fri11:033.011:193.05:030.14:520.44:187:26Waxing Crescent26Fri
27Sat11:552.95:500.35:580.64:197:27First Quarter27Sat
28Sun12:062.712:462.96:310.47:030.74:197:27First Quarter28Sun
29Mon12:532.51:372.87:060.58:040.84:197:26First Quarter29Mon
30Tue1:402.32:292.87:370.69:030.84:207:26First Quarter30Tue
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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