Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, July 25, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 5h 14m at 10:50 am (0.7 ft)
Next high tide : 6:00 pm (2.9 ft)
Sunset today : 8:10 pm
Sunrise tomorrow : 5:35 am
Moon phase : Waxing Gibbous (86% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Feb 1972

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue8:413.09:052.92:18-0.42:51-0.46:575:01Waning Gibbous1Tue
2Wed9:162.89:432.82:50-0.23:13-0.36:565:03Waning Gibbous2Wed
3Thu9:502.610:202.73:23-0.13:35-0.26:555:04Waning Gibbous3Thu
4Fri10:262.410:582.53:580.14:030.06:545:05Waning Gibbous4Fri
5Sat11:042.111:372.44:390.34:370.16:535:06Third Quarter5Sat
6Sun11:461.95:290.45:200.36:525:08Third Quarter6Sun
7Mon12:202.312:341.86:370.56:110.46:515:09Third Quarter7Mon
8Tue1:122.21:311.78:240.67:110.46:505:10Third Quarter8Tue
9Wed2:212.22:461.79:420.58:260.46:495:11Waning Crescent9Wed
10Thu3:422.34:021.910:380.39:510.36:485:13Waning Crescent10Thu
11Fri4:412.64:562.111:230.110:520.06:465:14Waning Crescent11Fri
12Sat5:272.85:422.412:04-0.16:455:15Waning Crescent12Sat
13Sun6:093.16:252.712:40-0.36:445:16New Moon13Sun
14Mon6:513.37:093.012:28-0.41:14-0.56:435:18New Moon14Mon
15Tue7:333.47:533.31:14-0.61:46-0.76:415:19New Moon15Tue
16Wed8:163.38:373.41:59-0.72:18-0.86:405:20Waxing Crescent16Wed
17Thu9:003.29:233.52:43-0.62:53-0.86:395:21Waxing Crescent17Thu
18Fri9:473.010:133.43:30-0.53:31-0.76:375:23Waxing Crescent18Fri
19Sat10:382.811:063.34:23-0.34:13-0.56:365:24Waxing Crescent19Sat
20Sun11:342.55:34-0.15:04-0.36:345:25First Quarter20Sun
21Mon12:053.112:352.37:050.16:06-0.16:335:26First Quarter21Mon
22Tue1:102.91:422.28:260.27:300.16:325:27First Quarter22Tue
23Wed2:262.82:582.29:370.19:130.16:305:29Waxing Gibbous23Wed
24Thu3:452.84:092.410:360.110:260.06:295:30Waxing Gibbous24Thu
25Fri4:482.85:072.611:26-0.111:22-0.26:275:31Waxing Gibbous25Fri
26Sat5:392.95:572.812:10-0.26:265:32Waxing Gibbous26Sat
27Sun6:233.06:413.012:09-0.212:48-0.36:245:33Full Moon27Sun
28Mon7:033.07:223.112:51-0.31:21-0.46:235:34Full Moon28Mon
29Tue7:393.08:003.11:27-0.31:48-0.46:215:36Full Moon29Tue
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 2:25 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 spring phase. Tonight's moon is 86% 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 near their weekly maximum.

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 (86% illuminated). This places Block Island, RI in a spring tide cycle, so tidal ranges are near their weekly maximum 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