Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, July 24, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 11:40 pm (0.8 ft)
Next high tide : in 6h 50m at 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 - Feb 2084

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue2:302.92:592.29:340.18:47-0.16:565:02Waning Crescent1Tue
2Wed3:453.04:122.410:38-0.110:13-0.36:555:03Waning Crescent2Wed
3Thu4:513.35:142.711:32-0.411:19-0.56:545:05Waning Crescent3Thu
4Fri5:473.56:083.012:22-0.66:535:06New Moon4Fri
5Sat6:383.66:593.212:17-0.71:07-0.76:525:07New Moon5Sat
6Sun7:263.67:473.41:10-0.81:49-0.86:515:08New Moon6Sun
7Mon8:123.58:333.41:59-0.82:26-0.86:505:10New Moon7Mon
8Tue8:563.39:193.32:44-0.72:59-0.76:495:11Waxing Crescent8Tue
9Wed9:403.010:033.23:27-0.53:29-0.56:485:12Waxing Crescent9Wed
10Thu10:242.710:492.94:10-0.23:58-0.36:465:13Waxing Crescent10Thu
11Fri11:102.411:362.74:590.14:31-0.16:455:15First Quarter11Fri
12Sat11:582.16:040.35:110.26:445:16First Quarter12Sat
13Sun12:262.412:511.97:230.56:010.36:435:17First Quarter13Sun
14Mon1:232.21:551.78:380.67:030.56:415:18First Quarter14Mon
15Tue2:422.13:151.79:430.58:310.56:405:20Waxing Gibbous15Tue
16Wed4:012.24:201.910:370.49:590.46:395:21Waxing Gibbous16Wed
17Thu4:552.35:082.111:210.310:530.26:375:22Waxing Gibbous17Thu
18Fri5:362.55:482.312:010.16:365:23Waxing Gibbous18Fri
19Sat6:102.76:242.512:36-0.16:345:25Waxing Gibbous19Sat
20Sun6:402.86:582.712:19-0.21:07-0.26:335:26Full Moon20Sun
21Mon7:122.97:332.912:58-0.31:33-0.36:325:27Full Moon21Mon
22Tue7:452.98:083.11:34-0.41:55-0.46:305:28Full Moon22Tue
23Wed8:202.98:463.22:09-0.42:18-0.46:295:29Waning Gibbous23Wed
24Thu8:592.89:263.22:45-0.32:47-0.46:275:31Waning Gibbous24Thu
25Fri9:412.710:103.13:23-0.33:22-0.46:265:32Waning Gibbous25Fri
26Sat10:292.511:013.14:07-0.14:03-0.36:245:33Waning Gibbous26Sat
27Sun11:222.411:573.05:000.04:53-0.16:235:34Third Quarter27Sun
28Mon12:222.36:140.25:540.06:215:35Third Quarter28Mon
29Tue1:012.91:292.27:590.27:100.16:205:36Third Quarter29Tue
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 8:24 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