Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Thursday, July 23, 2026
The tide is currently rising in Block Island, RI.
Next low tide (tomorrow) : 9:41 am (0.7 ft)
Next high tide (tomorrow) : in 5h 02m at 4:22 am (2.1 ft)
Sunset today : 8:12 pm
Sunrise tomorrow : 5:33 am
Moon phase : Waxing Gibbous (71% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Jun 1974

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat5:322.76:053.511:350.15:158:12Waxing Gibbous1Sat
2Sun6:252.76:533.512:410.212:180.15:158:13Waxing Gibbous2Sun
3Mon7:132.87:393.51:270.112:580.15:148:13Full Moon3Mon
4Tue7:582.88:223.52:090.11:370.25:148:14Full Moon4Tue
5Wed8:412.89:023.42:480.12:140.25:148:15Full Moon5Wed
6Thu9:222.89:413.23:240.12:500.35:138:15Full Moon6Thu
7Fri10:032.710:183.13:580.23:260.35:138:16Waning Gibbous7Fri
8Sat10:422.710:553.04:300.24:030.55:138:17Waning Gibbous8Sat
9Sun11:232.611:332.85:040.34:440.65:138:17Waning Gibbous9Sun
10Mon12:052.55:390.45:310.75:138:18Waning Gibbous10Mon
11Tue12:142.712:472.56:190.56:260.85:128:18Third Quarter11Tue
12Wed12:572.61:312.67:010.57:320.85:128:19Third Quarter12Wed
13Thu1:432.52:172.77:450.58:490.85:128:19Third Quarter13Thu
14Fri2:352.43:092.88:320.410:070.75:128:20Third Quarter14Fri
15Sat3:342.44:083.09:240.411:090.55:128:20Waning Crescent15Sat
16Sun4:382.55:063.310:190.25:128:20Waning Crescent16Sun
17Mon5:382.66:013.512:010.311:15 AM0.15:128:21Waning Crescent17Mon
18Tue6:322.96:533.812:510.112:08-0.15:128:21New Moon18Tue
19Wed7:243.17:454.01:41-0.11:02-0.35:138:21New Moon19Wed
20Thu8:153.28:364.12:30-0.31:56-0.45:138:22New Moon20Thu
21Fri9:073.49:284.03:17-0.42:51-0.45:138:22New Moon21Fri
22Sat9:593.510:193.94:03-0.43:46-0.35:138:22Waxing Crescent22Sat
23Sun10:533.511:123.74:50-0.34:42-0.25:138:22Waxing Crescent23Sun
24Mon11:483.55:40-0.25:480.05:148:23Waxing Crescent24Mon
25Tue12:063.412:453.56:34-0.17:070.25:148:23First Quarter25Tue
26Wed1:023.11:433.47:290.08:220.35:148:23First Quarter26Wed
27Thu1:592.82:433.48:220.29:310.45:158:23First Quarter27Thu
28Fri2:592.63:463.39:170.310:350.55:158:23Waxing Gibbous28Fri
29Sat4:052.54:493.310:140.311:320.55:168:23Waxing Gibbous29Sat
30Sun5:092.55:463.311:080.45:168:23Waxing Gibbous30Sun
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 7:01 am — 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 71% 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 (71% 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