Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, July 3, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 4:08 pm (0.5 ft)
Next high tide : in 4h 33m at 10:34 am (2.7 ft)
Sunset today : 8:22 pm
Sunrise tomorrow : 5:18 am
Moon phase : Waning Gibbous (88% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Oct 1999

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri12:373.01:053.56:060.28:120.46:426:29Third Quarter1Fri
2Sat1:402.92:113.37:240.39:240.46:436:27Third Quarter2Sat
3Sun2:482.93:243.29:050.410:270.36:446:25Third Quarter3Sun
4Mon3:592.94:353.210:240.311:210.26:456:24Waning Crescent4Mon
5Tue5:043.15:353.311:260.26:466:22Waning Crescent5Tue
6Wed5:593.36:253.312:080.112:180.16:476:21Waning Crescent6Wed
7Thu6:473.57:103.412:500.11:040.06:496:19New Moon7Thu
8Fri7:313.67:513.31:270.01:450.06:506:17New Moon8Fri
9Sat8:133.68:293.31:580.02:230.06:516:16New Moon9Sat
10Sun8:513.69:063.22:250.02:560.16:526:14New Moon10Sun
11Mon9:283.59:423.02:480.13:260.26:536:12Waxing Crescent11Mon
12Tue10:033.310:182.83:130.23:560.36:546:11Waxing Crescent12Tue
13Wed10:383.110:562.63:440.34:290.46:556:09Waxing Crescent13Wed
14Thu11:152.911:382.54:190.55:090.66:566:08Waxing Crescent14Thu
15Fri11:582.84:590.66:000.76:576:06First Quarter15Fri
16Sat12:262.312:472.65:460.87:210.86:586:05First Quarter16Sat
17Sun1:182.31:422.66:450.98:550.86:596:03First Quarter17Sun
18Mon2:152.32:432.67:570.99:560.77:016:01First Quarter18Mon
19Tue3:182.43:502.79:300.810:430.67:026:00Waxing Gibbous19Tue
20Wed4:222.64:502.910:450.611:220.47:035:59Waxing Gibbous20Wed
21Thu5:162.95:413.111:370.311:570.17:045:57Waxing Gibbous21Thu
22Fri6:033.36:273.312:230.17:055:56Waxing Gibbous22Fri
23Sat6:473.67:123.512:32-0.11:08-0.27:065:54Full Moon23Sat
24Sun7:323.97:593.61:09-0.31:54-0.37:075:53Full Moon24Sun
25Mon8:194.18:463.61:48-0.52:42-0.47:095:51Full Moon25Mon
26Tue9:064.29:353.52:30-0.53:29-0.47:105:50Waning Gibbous26Tue
27Wed9:564.110:273.33:14-0.44:20-0.37:115:49Waning Gibbous27Wed
28Thu10:493.911:223.24:01-0.35:20-0.17:125:47Waning Gibbous28Thu
29Fri11:473.74:52-0.16:390.17:135:46Waning Gibbous29Fri
30Sat12:233.012:503.45:550.27:560.27:145:45Third Quarter30Sat
31Sun1:272.912:563.26:310.38:030.36:164:43Third Quarter31Sun
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 1:21 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 88% 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 Waning Gibbous (88% 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