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 3h 55m 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 - Oct 2083

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri11:242.84:320.55:300.86:436:28Waning Gibbous1Fri
2Sat12:012.312:102.75:150.76:471.06:446:26Third Quarter2Sat
3Sun12:532.21:042.66:070.98:421.06:456:24Third Quarter3Sun
4Mon1:502.22:052.57:130.99:460.96:466:23Third Quarter4Mon
5Tue2:542.23:142.68:340.910:350.86:476:21Third Quarter5Tue
6Wed4:022.44:212.710:030.811:150.66:486:19Waning Crescent6Wed
7Thu4:582.75:142.911:040.511:470.46:496:18Waning Crescent7Thu
8Fri5:433.05:593.111:540.36:506:16Waning Crescent8Fri
9Sat6:253.46:423.212:170.212:390.06:516:15Waning Crescent9Sat
10Sun7:073.77:253.312:47-0.11:24-0.26:526:13New Moon10Sun
11Mon7:504.08:103.41:21-0.22:09-0.36:546:11New Moon11Mon
12Tue8:354.18:573.41:58-0.32:55-0.36:556:10New Moon12Tue
13Wed9:224.19:463.32:39-0.33:42-0.26:566:08Waxing Crescent13Wed
14Thu10:134.010:373.13:23-0.34:33-0.16:576:07Waxing Crescent14Thu
15Fri11:073.811:342.94:10-0.15:350.16:586:05Waxing Crescent15Fri
16Sat12:083.65:040.16:570.36:596:04First Quarter16Sat
17Sun12:362.81:153.36:150.38:140.47:006:02First Quarter17Sun
18Mon1:432.82:233.18:080.49:190.47:016:01First Quarter18Mon
19Tue2:532.83:333.09:340.410:160.37:025:59First Quarter19Tue
20Wed4:022.94:373.010:420.411:050.37:035:58Waxing Gibbous20Wed
21Thu5:043.15:313.011:370.311:460.27:055:56Waxing Gibbous21Thu
22Fri5:553.36:183.012:250.27:065:55Waxing Gibbous22Fri
23Sat6:403.56:593.012:210.11:080.27:075:53Full Moon23Sat
24Sun7:203.57:393.012:510.11:460.17:085:52Full Moon24Sun
25Mon7:573.58:172.91:180.02:210.17:095:50Full Moon25Mon
26Tue8:323.58:532.91:460.12:520.27:105:49Full Moon26Tue
27Wed9:053.39:302.82:160.13:210.27:125:48Waning Gibbous27Wed
28Thu9:383.210:072.62:500.23:510.47:135:46Waning Gibbous28Thu
29Fri10:133.010:472.53:260.34:240.57:145:45Waning Gibbous29Fri
30Sat10:512.811:312.34:050.55:040.77:155:44Waning Gibbous30Sat
31Sun11:362.74:470.66:010.87:165:43Waning Gibbous31Sun
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