Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, July 24, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 2h 49m at 9:41 am (0.7 ft)
Next high tide : 5:08 pm (2.8 ft)
Sunset today : 8:11 pm
Sunrise tomorrow : 5:34 am
Moon phase : Waxing Gibbous (79% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Nov 2083

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon12:222.212:282.65:370.87:460.87:175:41Third Quarter1Mon
2Tue1:162.21:232.56:400.88:480.87:195:40Third Quarter2Tue
3Wed2:132.32:222.57:580.89:350.77:205:39Third Quarter3Wed
4Thu3:132.53:242.69:250.710:130.57:215:38Third Quarter4Thu
5Fri4:122.84:262.710:350.510:490.37:225:37Waning Crescent5Fri
6Sat5:053.15:222.911:300.211:260.07:235:35Waning Crescent6Sat
7Sun4:533.55:123.011:19-0.111:05-0.26:254:34Waning Crescent7Sun
8Mon5:393.86:013.212:07-0.36:264:33New Moon8Mon
9Tue6:264.16:503.212:55-0.46:274:32New Moon9Tue
10Wed7:154.27:403.312:32-0.51:45-0.56:284:31New Moon10Wed
11Thu8:064.28:313.21:20-0.52:35-0.46:294:30Waxing Crescent11Thu
12Fri8:594.09:243.12:10-0.43:28-0.36:314:29Waxing Crescent12Fri
13Sat9:543.810:213.03:01-0.24:27-0.16:324:28Waxing Crescent13Sat
14Sun10:543.511:232.94:000.05:370.16:334:28Waxing Crescent14Sun
15Mon11:573.25:230.26:450.26:344:27First Quarter15Mon
16Tue12:272.91:003.07:020.37:440.26:354:26First Quarter16Tue
17Wed1:322.92:032.88:180.48:380.36:364:25First Quarter17Wed
18Thu2:382.93:062.69:240.49:250.26:384:24Waxing Gibbous18Thu
19Fri3:393.04:032.610:190.310:060.26:394:24Waxing Gibbous19Fri
20Sat4:313.14:522.611:070.310:420.26:404:23Waxing Gibbous20Sat
21Sun5:163.25:352.611:490.211:130.16:414:22Waxing Gibbous21Sun
22Mon5:563.36:152.612:270.26:424:22Full Moon22Mon
23Tue6:333.26:542.61:030.16:434:21Full Moon23Tue
24Wed7:083.27:312.612:160.11:370.16:444:21Full Moon24Wed
25Thu7:423.18:082.612:520.12:100.26:464:20Full Moon25Thu
26Fri8:163.08:452.51:290.12:420.26:474:20Waning Gibbous26Fri
27Sat8:512.99:232.42:070.23:140.36:484:19Waning Gibbous27Sat
28Sun9:282.810:052.32:450.33:480.46:494:19Waning Gibbous28Sun
29Mon10:092.710:522.33:260.44:270.56:504:18Waning Gibbous29Mon
30Tue10:552.611:422.34:130.55:140.56:514:18Third Quarter30Tue
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

Common Questions About Block Island, RI Tides

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What time does the tide turn (slack tide) in Block Island, RI today?

Slack tide in Block Island, RI is approximately 1:24 pm — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

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 79% 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 (79% 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