Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

55°
H 56°
L 48°
NE
21mph
High tide
4:51 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Wednesday, October 21, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 11:14 pm (0.5 ft)
Next high tide : in 5h 50m at 4:51 pm (2.7 ft)
Sunset today : 5:56 pm
Sunrise tomorrow : 7:04 am
Moon phase : Waxing Gibbous (78% 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 1800

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed6:093.56:323.412:060.012:310.05:465:32Full Moon1Wed
2Thu6:523.67:123.312:390.01:110.05:475:31Full Moon2Thu
3Fri7:313.67:493.21:07-0.11:480.15:485:29Full Moon3Fri
4Sat8:073.68:263.11:320.02:200.25:505:27Full Moon4Sat
5Sun8:423.49:032.91:580.12:490.35:515:26Waning Gibbous5Sun
6Mon9:153.29:412.72:270.23:180.45:525:24Waning Gibbous6Mon
7Tue9:493.010:222.53:000.43:520.65:535:22Waning Gibbous7Tue
8Wed10:282.811:082.33:370.64:370.85:545:21Waning Gibbous8Wed
9Thu11:142.64:200.76:051.05:555:19Third Quarter9Thu
10Fri12:012.212:102.55:140.97:551.05:565:18Third Quarter10Fri
11Sat1:012.11:142.56:211.08:580.95:575:16Third Quarter11Sat
12Sun2:082.22:272.67:460.99:470.85:585:14Third Quarter12Sun
13Mon3:162.33:342.79:140.810:250.65:595:13Waning Crescent13Mon
14Tue4:092.64:252.910:130.510:580.36:005:11Waning Crescent14Tue
15Wed4:533.05:083.111:010.311:260.16:015:10Waning Crescent15Wed
16Thu5:343.45:503.311:460.011:56-0.16:035:08New Moon16Thu
17Fri6:153.76:333.412:31-0.26:045:07New Moon17Fri
18Sat6:584.07:183.412:28-0.31:16-0.36:055:05New Moon18Sat
19Sun7:424.18:043.31:05-0.32:02-0.36:065:04New Moon19Sun
20Mon8:294.18:533.21:45-0.32:49-0.26:075:02Waxing Crescent20Mon
21Tue9:194.09:453.02:28-0.33:41-0.16:085:01Waxing Crescent21Tue
22Wed10:143.810:422.93:15-0.14:450.26:094:59Waxing Crescent22Wed
23Thu11:163.511:462.74:090.16:100.36:114:58First Quarter23Thu
24Fri12:243.35:220.47:270.46:124:56First Quarter24Fri
25Sat12:542.71:353.17:200.58:320.46:134:55First Quarter25Sat
26Sun2:052.72:463.08:460.49:290.36:144:54First Quarter26Sun
27Mon3:152.93:493.09:520.310:160.26:154:52Waxing Gibbous27Mon
28Tue4:153.14:413.010:460.210:560.16:164:51Waxing Gibbous28Tue
29Wed5:043.35:263.011:330.211:290.16:184:50Waxing Gibbous29Wed
30Thu5:483.56:073.012:150.16:194:48Full Moon30Thu
31Fri6:273.56:453.012:520.16:204:47Full Moon31Fri
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 78% 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 (78% 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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