Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

55°
H 56°
L 48°
NNE
20mph
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 4h 53m 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

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 - Sep 1800

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon5:383.26:093.711:510.05:166:23Full Moon1Mon
2Tue6:283.46:553.712:360.012:41-0.15:176:22Full Moon2Tue
3Wed7:143.57:383.61:15-0.11:27-0.15:186:20Full Moon3Wed
4Thu7:583.68:183.51:49-0.12:090.05:196:18Full Moon4Thu
5Fri8:393.68:583.32:19-0.12:460.15:206:17Waning Gibbous5Fri
6Sat9:183.49:363.02:440.03:210.35:216:15Waning Gibbous6Sat
7Sun9:573.310:162.83:090.23:550.55:226:13Waning Gibbous7Sun
8Mon10:353.110:592.53:390.34:340.75:236:12Waning Gibbous8Mon
9Tue11:152.911:452.34:150.55:290.85:246:10Third Quarter9Tue
10Wed12:002.74:580.77:061.05:256:08Third Quarter10Wed
11Thu12:372.212:522.65:510.98:291.05:266:07Third Quarter11Thu
12Fri1:372.12:012.56:560.99:340.95:276:05Third Quarter12Fri
13Sat2:532.13:272.68:150.910:250.85:286:03Waning Crescent13Sat
14Sun3:592.34:262.89:380.811:070.65:296:01Waning Crescent14Sun
15Mon4:472.55:073.010:360.511:430.45:306:00Waning Crescent15Mon
16Tue5:272.85:443.211:230.35:315:58Waning Crescent16Tue
17Wed6:063.16:223.412:150.212:060.15:325:56New Moon17Wed
18Thu6:453.47:013.512:430.112:490.05:335:55New Moon18Thu
19Fri7:263.77:423.51:11-0.11:32-0.15:345:53New Moon19Fri
20Sat8:083.88:253.41:40-0.22:15-0.15:355:51Waxing Crescent20Sat
21Sun8:523.99:103.22:14-0.23:00-0.15:365:49Waxing Crescent21Sun
22Mon9:393.810:003.12:51-0.13:480.15:375:48Waxing Crescent22Mon
23Tue10:313.710:552.93:330.04:470.35:385:46Waxing Crescent23Tue
24Wed11:303.511:562.74:220.26:150.55:395:44First Quarter24Wed
25Thu12:353.45:240.47:410.55:405:43First Quarter25Thu
26Fri1:032.61:473.26:530.58:530.55:415:41First Quarter26Fri
27Sat2:162.63:033.28:430.59:540.45:425:39Waxing Gibbous27Sat
28Sun3:302.84:103.39:580.310:450.35:435:38Waxing Gibbous28Sun
29Mon4:323.05:043.410:560.211:280.15:445:36Waxing Gibbous29Mon
30Tue5:233.35:503.411:460.15:455:34Waxing Gibbous30Tue
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.
Any commercial use, modification, redistribution, or repackaging without written permission is strictly prohibited.

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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