Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

53°
H -°
L 50°
NE
25mph
High tide
4:27 am
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 : 10:49 am (0.7 ft)
Next high tide : in 1h 39m at 4:27 am (2.5 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 - Apr 1801

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:472.99:103.62:40-0.42:26-0.45:336:14Waning Gibbous1Wed
2Thu9:322.89:573.53:21-0.33:05-0.35:326:15Waning Gibbous2Thu
3Fri10:232.610:513.34:08-0.13:50-0.25:306:16Waning Gibbous3Fri
4Sat11:192.511:523.15:100.14:440.05:286:17Third Quarter4Sat
5Sun12:222.46:390.25:540.25:276:19Third Quarter5Sun
6Mon12:593.01:312.48:040.37:370.35:256:20Third Quarter6Mon
7Tue2:132.92:462.59:130.29:190.25:236:21Third Quarter7Tue
8Wed3:282.93:572.810:090.110:270.05:226:22Waning Crescent8Wed
9Thu4:313.04:553.010:57-0.111:23-0.15:206:23Waning Crescent9Thu
10Fri5:223.15:443.311:38-0.25:186:24Waning Crescent10Fri
11Sat6:083.16:293.512:12-0.212:15-0.35:176:25New Moon11Sat
12Sun6:513.17:113.612:58-0.312:47-0.35:156:26New Moon12Sun
13Mon7:333.07:513.51:38-0.31:17-0.35:146:27New Moon13Mon
14Tue8:132.98:283.42:15-0.21:45-0.25:126:28New Moon14Tue
15Wed8:522.79:043.22:48-0.12:14-0.15:116:29Waxing Crescent15Wed
16Thu9:312.69:403.03:180.12:470.15:096:30Waxing Crescent16Thu
17Fri10:132.410:182.73:490.33:230.35:076:31Waxing Crescent17Fri
18Sat10:582.211:012.54:280.54:050.55:066:32Waxing Crescent18Sat
19Sun11:482.111:522.45:310.64:550.65:046:33First Quarter19Sun
20Mon12:432.07:160.75:570.85:036:34First Quarter20Mon
21Tue12:502.31:452.08:250.77:170.85:016:35First Quarter21Tue
22Wed1:562.32:542.19:180.68:540.75:006:37First Quarter22Wed
23Thu3:092.33:512.410:010.510:000.54:586:38Waxing Gibbous23Thu
24Fri4:052.54:362.710:350.310:510.34:576:39Waxing Gibbous24Fri
25Sat4:502.65:163.011:040.111:360.04:566:40Waxing Gibbous25Sat
26Sun5:322.85:553.411:330.04:546:41Waxing Gibbous26Sun
27Mon6:142.96:363.712:20-0.212:05-0.24:536:42Full Moon27Mon
28Tue6:573.07:203.81:03-0.312:42-0.34:516:43Full Moon28Tue
29Wed7:433.08:053.91:47-0.41:22-0.44:506:44Full Moon29Wed
30Thu8:303.08:533.92:31-0.42:05-0.34:496:45Waning Gibbous30Thu
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 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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