Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Thursday, July 23, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 1h 46m at 10:48 pm (0.8 ft)
Next high tide (tomorrow) : 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 - Feb 2083

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon6:252.96:462.61:06-0.26:565:03Full Moon1Mon
2Tue7:033.17:262.812:36-0.31:38-0.36:555:04Full Moon2Tue
3Wed7:413.28:063.01:19-0.52:06-0.56:545:05Full Moon3Wed
4Thu8:213.28:483.12:00-0.52:32-0.56:535:06Waning Gibbous4Thu
5Fri9:033.19:333.22:42-0.53:02-0.66:525:08Waning Gibbous5Fri
6Sat9:482.910:203.23:26-0.43:36-0.56:515:09Waning Gibbous6Sat
7Sun10:372.711:123.24:16-0.24:17-0.46:505:10Waning Gibbous7Sun
8Mon11:312.55:17-0.15:06-0.36:485:11Third Quarter8Mon
9Tue12:093.112:302.36:410.16:05-0.16:475:13Third Quarter9Tue
10Wed1:122.91:362.28:140.17:190.06:465:14Third Quarter10Wed
11Thu2:252.92:532.29:310.19:030.06:455:15Waning Crescent11Thu
12Fri3:432.94:072.310:340.010:24-0.16:435:16Waning Crescent12Fri
13Sat4:483.05:082.511:27-0.211:24-0.36:425:18Waning Crescent13Sat
14Sun5:423.26:002.812:14-0.36:415:19Waning Crescent14Sun
15Mon6:303.26:473.012:16-0.412:55-0.46:405:20New Moon15Mon
16Tue7:133.27:313.11:02-0.51:32-0.56:385:21New Moon16Tue
17Wed7:533.28:123.11:43-0.52:03-0.56:375:22New Moon17Wed
18Thu8:313.08:503.12:18-0.42:28-0.56:355:24Waxing Crescent18Thu
19Fri9:072.89:262.92:50-0.32:51-0.46:345:25Waxing Crescent19Fri
20Sat9:422.610:002.83:20-0.13:15-0.26:335:26Waxing Crescent20Sat
21Sun10:192.410:352.63:510.13:45-0.16:315:27Waxing Crescent21Sun
22Mon10:582.111:122.44:270.34:210.16:305:28First Quarter22Mon
23Tue11:411.911:552.35:130.45:040.36:285:30First Quarter23Tue
24Wed12:311.86:220.65:560.46:275:31First Quarter24Wed
25Thu12:482.21:311.78:320.76:590.56:255:32First Quarter25Thu
26Fri1:562.12:491.79:440.68:180.56:245:33First Quarter26Fri
27Sat3:272.24:031.910:360.49:460.36:225:34Waxing Gibbous27Sat
28Sun4:322.54:542.211:190.210:470.16:215:36Waxing Gibbous28Sun
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

Common Questions About Block Island, RI Tides

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

Slack tide in Block Island, RI is approximately 1:35 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