Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

65°
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 3h 29m 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

New Harbor Great Salt Pond Block Island Aerial

New Shoreham (Block Island) Harbormaster
Champlins Marina Resort, docks filled on a sunny summer day

Champlin's Marina & Resort
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 - May 1857

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri1:212.81:552.68:180.48:230.54:476:47First Quarter1Fri
2Sat2:292.63:012.69:120.49:300.54:466:48First Quarter2Sat
3Sun3:322.54:002.89:580.410:240.44:446:49Waxing Gibbous3Sun
4Mon4:252.54:492.910:360.311:090.44:436:50Waxing Gibbous4Mon
5Tue5:092.55:313.111:080.311:490.34:426:51Waxing Gibbous5Tue
6Wed5:482.56:083.211:350.24:416:52Waxing Gibbous6Wed
7Thu6:242.66:423.312:260.212:010.24:396:53Full Moon7Thu
8Fri6:582.67:153.31:020.112:290.14:386:54Full Moon8Fri
9Sat7:322.67:473.21:360.11:000.24:376:55Full Moon9Sat
10Sun8:072.58:203.22:090.11:340.24:366:56Full Moon10Sun
11Mon8:432.58:563.12:420.22:100.34:356:57Waning Gibbous11Mon
12Tue9:212.49:362.93:140.32:470.44:346:58Waning Gibbous12Tue
13Wed10:042.310:212.93:510.43:280.54:336:59Waning Gibbous13Wed
14Thu10:532.311:122.84:360.54:150.64:327:00Waning Gibbous14Thu
15Fri11:472.35:330.55:140.64:317:01Third Quarter15Fri
16Sat12:062.712:442.56:360.56:260.74:307:02Third Quarter16Sat
17Sun1:042.71:442.77:340.47:500.64:297:03Third Quarter17Sun
18Mon2:062.72:472.98:280.29:170.44:287:04Third Quarter18Mon
19Tue3:122.83:483.39:200.010:240.14:277:05Waning Crescent19Tue
20Wed4:152.94:443.610:09-0.111:21-0.14:267:06Waning Crescent20Wed
21Thu5:123.05:363.910:57-0.34:267:07Waning Crescent21Thu
22Fri6:053.16:274.112:16-0.311:46 AM-0.44:257:08New Moon22Fri
23Sat6:583.27:194.21:10-0.512:35-0.44:247:08New Moon23Sat
24Sun7:503.28:114.12:02-0.51:27-0.44:237:09New Moon24Sun
25Mon8:423.29:043.92:53-0.42:18-0.34:237:10Waxing Crescent25Mon
26Tue9:353.19:583.63:46-0.23:10-0.14:227:11Waxing Crescent26Tue
27Wed10:303.010:543.34:430.04:060.14:217:12Waxing Crescent27Wed
28Thu11:282.911:523.05:430.25:170.34:217:13First Quarter28Thu
29Fri12:272.86:410.36:390.54:207:14First Quarter29Fri
30Sat12:482.81:252.87:330.47:490.64:207:14First Quarter30Sat
31Sun1:432.62:232.88:190.58:520.74:197:15First Quarter31Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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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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