Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, July 25, 2026
The tide is currently falling in Block Island, RI.
Next low tide (tomorrow) : in 6h 00m at 12:27 am (0.7 ft)
Next high tide (tomorrow) : 6:15 am (2.3 ft)
Sunset today : 8:10 pm
Sunrise tomorrow : 5:35 am
Moon phase : Waxing Gibbous (86% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Jun 1971

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue2:072.42:542.68:410.69:100.85:158:12First Quarter1Tue
2Wed2:572.33:482.79:180.610:110.75:158:12First Quarter2Wed
3Thu3:532.24:392.89:540.611:050.65:148:13Waxing Gibbous3Thu
4Fri4:502.25:242.910:330.511:530.55:148:14Waxing Gibbous4Fri
5Sat5:392.36:043.111:120.45:148:15Waxing Gibbous5Sat
6Sun6:212.46:433.212:380.411:53 AM0.35:138:15Waxing Gibbous6Sun
7Mon7:022.57:233.41:220.312:340.35:138:16Full Moon7Mon
8Tue7:432.68:053.42:040.21:170.25:138:16Full Moon8Tue
9Wed8:262.78:483.52:450.12:010.15:138:17Full Moon9Wed
10Thu9:102.89:323.53:240.12:460.15:138:18Full Moon10Thu
11Fri9:572.810:183.54:010.13:320.15:128:18Waning Gibbous11Fri
12Sat10:452.911:063.44:400.14:200.25:128:19Waning Gibbous12Sat
13Sun11:383.011:583.35:230.15:140.35:128:19Waning Gibbous13Sun
14Mon12:333.16:110.16:210.45:128:20Third Quarter14Mon
15Tue12:523.11:293.27:020.17:470.45:128:20Third Quarter15Tue
16Wed1:492.92:273.37:540.19:120.45:128:20Third Quarter16Wed
17Thu2:492.83:293.48:480.110:260.35:128:21Third Quarter17Thu
18Fri3:552.74:343.59:460.011:290.25:128:21Waning Crescent18Fri
19Sat5:012.75:353.610:450.05:138:21Waning Crescent19Sat
20Sun6:022.86:313.712:260.111:43 AM0.05:138:22Waning Crescent20Sun
21Mon6:572.97:233.81:190.012:370.05:138:22New Moon21Mon
22Tue7:493.08:143.72:090.01:300.05:138:22New Moon22Tue
23Wed8:383.09:013.62:56-0.12:200.05:138:22New Moon23Wed
24Thu9:263.09:463.53:390.03:060.15:148:22New Moon24Thu
25Fri10:133.010:293.34:190.13:470.25:148:23Waxing Crescent25Fri
26Sat10:592.911:103.14:560.24:280.45:148:23Waxing Crescent26Sat
27Sun11:452.811:512.95:330.35:110.55:158:23Waxing Crescent27Sun
28Mon12:312.86:070.46:010.75:158:23Waxing Crescent28Mon
29Tue12:312.71:152.76:390.57:020.85:168:23First Quarter29Tue
30Wed1:122.51:572.77:120.58:090.85:168:23First Quarter30Wed
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 3:21 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 spring phase. Tonight's moon is 86% 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 Waxing Gibbous (86% 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