Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, August 8, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 6h 51m at 11:30 pm (0.3 ft)
Next high tide (tomorrow) : 4:59 am (2.7 ft)
Sunset today : 7:54 pm
Sunrise tomorrow : 5:49 am
Moon phase : Waning Crescent (22% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Jun 1946

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat9:323.39:524.13:41-0.53:09-0.45:158:12Waxing Crescent1Sat
2Sun10:253.210:463.94:34-0.44:01-0.25:158:12Waxing Crescent2Sun
3Mon11:203.111:433.65:31-0.24:570.05:148:13Waxing Crescent3Mon
4Tue12:183.06:330.06:060.25:148:14Waxing Crescent4Tue
5Wed12:423.31:182.97:340.27:310.45:148:15First Quarter5Wed
6Thu1:403.02:182.98:290.38:450.55:138:15First Quarter6Thu
7Fri2:392.73:182.99:200.49:500.65:138:16First Quarter7Fri
8Sat3:392.54:182.910:060.410:480.65:138:16Waxing Gibbous8Sat
9Sun4:382.45:123.010:470.411:370.55:138:17Waxing Gibbous9Sun
10Mon5:302.45:583.111:220.45:138:18Waxing Gibbous10Mon
11Tue6:142.46:393.212:210.511:53 AM0.45:128:18Waxing Gibbous11Tue
12Wed6:552.57:173.21:010.412:240.35:128:19Waxing Gibbous12Wed
13Thu7:332.57:533.31:410.312:580.35:128:19Full Moon13Thu
14Fri8:112.68:283.32:200.21:360.35:128:20Full Moon14Fri
15Sat8:472.69:033.22:570.22:140.35:128:20Full Moon15Sat
16Sun9:252.69:393.23:320.22:530.35:128:20Full Moon16Sun
17Mon10:032.610:183.14:060.33:320.45:128:21Waning Gibbous17Mon
18Tue10:452.611:003.04:390.34:120.55:128:21Waning Gibbous18Tue
19Wed11:302.611:453.05:150.44:570.55:128:21Waning Gibbous19Wed
20Thu12:202.65:570.45:500.65:138:22Waning Gibbous20Thu
21Fri12:352.91:112.76:440.46:540.65:138:22Third Quarter21Fri
22Sat1:282.82:052.97:350.38:090.65:138:22Third Quarter22Sat
23Sun2:242.83:033.18:270.29:340.55:138:22Third Quarter23Sun
24Mon3:272.84:053.49:230.110:510.35:148:22Waning Crescent24Mon
25Tue4:342.85:073.610:210.011:530.15:148:23Waning Crescent25Tue
26Wed5:372.96:043.911:18-0.25:148:23Waning Crescent26Wed
27Thu6:353.17:004.112:50-0.212:14-0.35:158:23New Moon27Thu
28Fri7:303.27:544.21:46-0.31:09-0.35:158:23New Moon28Fri
29Sat8:243.38:474.12:39-0.42:06-0.45:158:23New Moon29Sat
30Sun9:163.49:394.03:30-0.43:01-0.35:168:23New Moon30Sun
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 2:14 am — 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 22% 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 Waning Crescent (22% 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