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 6h 15m 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 - Mar 2082

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun8:312.88:462.92:16-0.22:18-0.36:195:37Waxing Crescent1Sun
2Mon9:022.69:152.82:44-0.12:42-0.26:175:38Waxing Crescent2Mon
3Tue9:342.49:462.73:130.03:10-0.16:165:39Waxing Crescent3Tue
4Wed10:092.310:212.63:450.13:420.06:145:40Waxing Crescent4Wed
5Thu10:492.111:022.54:220.34:190.26:135:42Waxing Crescent5Thu
6Fri11:361.911:522.45:090.55:050.36:115:43First Quarter6Fri
7Sat12:311.96:130.66:020.46:095:44First Quarter7Sat
8Sun12:522.42:361.89:270.68:100.47:086:45First Quarter8Sun
9Mon3:032.43:522.010:430.59:320.37:066:46First Quarter9Mon
10Tue4:232.65:032.311:340.210:560.07:046:47Waxing Gibbous10Tue
11Wed5:302.96:002.712:17-0.17:036:48Waxing Gibbous11Wed
12Thu6:233.26:493.112:00-0.312:56-0.47:016:49Waxing Gibbous12Thu
13Fri7:113.47:373.512:55-0.51:34-0.66:596:51Full Moon13Fri
14Sat7:583.58:243.81:47-0.82:11-0.86:586:52Full Moon14Sat
15Sun8:453.59:103.92:38-0.92:48-0.86:566:53Full Moon15Sun
16Mon9:323.39:583.93:27-0.93:25-0.86:546:54Waning Gibbous16Mon
17Tue10:203.110:473.84:16-0.74:03-0.66:536:55Waning Gibbous17Tue
18Wed11:112.811:413.55:08-0.54:45-0.46:516:56Waning Gibbous18Wed
19Thu12:052.66:12-0.15:32-0.16:496:57Third Quarter19Thu
20Fri12:403.21:052.37:300.16:350.26:486:58Third Quarter20Fri
21Sat1:452.92:112.28:470.38:250.46:466:59Third Quarter21Sat
22Sun2:592.63:252.19:570.410:000.46:447:00Third Quarter22Sun
23Mon4:152.54:382.210:560.411:080.36:437:02Waning Crescent23Mon
24Tue5:192.65:372.411:440.36:417:03Waning Crescent24Tue
25Wed6:082.66:252.612:000.212:240.26:397:04Waning Crescent25Wed
26Thu6:492.77:052.812:430.112:570.16:387:05Waning Crescent26Thu
27Fri7:262.77:413.01:210.01:25-0.16:367:06New Moon27Fri
28Sat7:592.88:143.11:560.01:50-0.16:347:07New Moon28Sat
29Sun8:312.88:433.12:28-0.12:14-0.26:337:08New Moon29Sun
30Mon9:022.79:123.12:58-0.12:39-0.16:317:09New Moon30Mon
31Tue9:342.69:413.03:26-0.13:07-0.16:297:10Waxing Crescent31Tue
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