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 : 10:48 pm (0.8 ft)
Next high tide : in 7h 17m at 4:05 pm (2.8 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 2082

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:342.69:542.63:040.03:21-0.26:565:03Waxing Crescent1Sun
2Mon10:072.410:282.53:370.13:49-0.16:555:04Waxing Crescent2Mon
3Tue10:442.211:042.44:150.24:210.06:545:05Waxing Crescent3Tue
4Wed11:242.011:442.44:590.45:000.26:535:07First Quarter4Wed
5Thu12:101.95:550.55:460.36:525:08First Quarter5Thu
6Fri12:322.31:041.77:190.66:410.36:505:09First Quarter6Fri
7Sat1:292.32:101.79:130.57:460.36:495:10First Quarter7Sat
8Sun2:412.43:271.810:170.49:010.26:485:12Waxing Gibbous8Sun
9Mon3:582.64:322.111:070.210:130.06:475:13Waxing Gibbous9Mon
10Tue4:582.95:242.411:51-0.111:13-0.36:465:14Waxing Gibbous10Tue
11Wed5:483.16:122.712:31-0.36:445:15Full Moon11Wed
12Thu6:343.46:593.112:06-0.51:09-0.66:435:17Full Moon12Thu
13Fri7:203.57:453.312:57-0.71:45-0.76:425:18Full Moon13Fri
14Sat8:053.58:323.51:47-0.82:20-0.86:415:19Full Moon14Sat
15Sun8:513.49:193.62:35-0.82:54-0.86:395:20Waning Gibbous15Sun
16Mon9:393.110:093.53:25-0.73:30-0.76:385:21Waning Gibbous16Mon
17Tue10:292.811:023.44:19-0.54:10-0.56:375:23Waning Gibbous17Tue
18Wed11:232.55:26-0.24:57-0.36:355:24Third Quarter18Wed
19Thu12:003.212:222.36:480.05:560.06:345:25Third Quarter19Thu
20Fri1:042.91:272.18:090.27:210.26:325:26Third Quarter20Fri
21Sat2:182.72:442.09:220.29:080.26:315:28Third Quarter21Sat
22Sun3:362.73:582.110:240.210:210.16:295:29Waning Crescent22Sun
23Mon4:412.74:582.311:150.111:160.06:285:30Waning Crescent23Mon
24Tue5:322.85:472.511:580.06:265:31Waning Crescent24Tue
25Wed6:162.96:302.712:02-0.112:35-0.16:255:32New Moon25Wed
26Thu6:542.97:092.812:42-0.11:07-0.26:235:33New Moon26Thu
27Fri7:292.97:442.91:17-0.21:34-0.36:225:35New Moon27Fri
28Sat8:012.98:162.91:48-0.21:57-0.36:205:36New Moon28Sat
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 7:26 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 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