Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, July 4, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 3h 02m at 4:50 pm (0.6 ft)
Next high tide : 11:27 pm (2.9 ft)
Sunset today : 8:22 pm
Sunrise tomorrow : 5:19 am
Moon phase : Waning Gibbous (81% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Aug 2058

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu5:172.75:523.710:590.15:428:02Waxing Gibbous1Thu
2Fri6:183.06:493.912:350.012:03-0.15:438:01Waxing Gibbous2Fri
3Sat7:133.27:434.11:27-0.21:04-0.35:448:00Full Moon3Sat
4Sun8:073.58:354.22:18-0.32:03-0.45:457:59Full Moon4Sun
5Mon8:593.69:264.13:05-0.43:00-0.45:467:58Full Moon5Mon
6Tue9:503.710:163.93:49-0.43:54-0.35:477:57Waning Gibbous6Tue
7Wed10:413.711:063.64:32-0.34:50-0.25:487:55Waning Gibbous7Wed
8Thu11:343.611:583.35:14-0.25:540.15:497:54Waning Gibbous8Thu
9Fri12:283.55:580.07:050.35:507:53Third Quarter9Fri
10Sat12:523.01:243.36:430.28:150.55:517:52Third Quarter10Sat
11Sun1:462.72:213.17:310.49:220.65:527:50Third Quarter11Sun
12Mon2:452.53:253.08:240.610:250.75:537:49Third Quarter12Mon
13Tue3:512.34:332.99:270.711:210.75:547:47Waning Crescent13Tue
14Wed4:562.35:332.910:340.75:557:46Waning Crescent14Wed
15Thu5:522.46:223.012:090.711:30 AM0.65:567:45Waning Crescent15Thu
16Fri6:382.67:053.112:520.612:160.55:577:43Waning Crescent16Fri
17Sat7:202.77:423.11:320.512:590.45:587:42New Moon17Sat
18Sun7:592.88:153.22:080.41:390.35:597:40New Moon18Sun
19Mon8:352.98:463.22:410.32:170.36:007:39New Moon19Mon
20Tue9:093.09:173.23:100.22:530.36:017:37New Moon20Tue
21Wed9:433.09:493.13:330.23:280.36:027:36Waxing Crescent21Wed
22Thu10:183.110:253.03:540.24:040.46:037:34Waxing Crescent22Thu
23Fri10:553.111:042.94:190.34:420.56:047:33Waxing Crescent23Fri
24Sat11:373.111:492.74:500.35:260.66:057:31Waxing Crescent24Sat
25Sun12:233.15:290.46:200.66:067:30First Quarter25Sun
26Mon12:402.61:153.16:170.47:280.76:077:28First Quarter26Mon
27Tue1:362.62:133.27:140.48:550.76:087:27First Quarter27Tue
28Wed2:392.53:203.28:190.410:220.56:097:25First Quarter28Wed
29Thu3:512.64:323.49:340.411:250.36:107:23Waxing Gibbous29Thu
30Fri5:022.85:383.610:550.26:117:22Waxing Gibbous30Fri
31Sat6:033.16:353.912:190.112:03-0.16:127:20Waxing Gibbous31Sat
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 8:08 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 81% 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 (81% 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