Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Monday, June 29, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 1:29 pm (0.4 ft)
Next high tide : in 3h 38m at 8:02 am (2.5 ft)
Sunset today : 8:23 pm
Sunrise tomorrow : 5:16 am
Moon phase : Full Moon (100% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Feb 2050

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue3:292.63:522.110:180.29:590.26:565:03Waxing Gibbous1Tue
2Wed4:322.64:492.211:090.210:510.16:555:04Waxing Gibbous2Wed
3Thu5:222.75:382.411:520.111:350.06:545:05Waxing Gibbous3Thu
4Fri6:062.86:202.512:310.06:535:06Waxing Gibbous4Fri
5Sat6:442.87:002.712:14-0.11:05-0.26:525:08Full Moon5Sat
6Sun7:172.97:362.712:50-0.21:36-0.26:515:09Full Moon6Sun
7Mon7:482.98:092.81:23-0.22:03-0.36:505:10Full Moon7Mon
8Tue8:172.88:412.81:55-0.22:24-0.36:485:11Full Moon8Tue
9Wed8:472.79:132.72:26-0.22:45-0.26:475:13Waning Gibbous9Wed
10Thu9:202.69:472.72:58-0.13:10-0.26:465:14Waning Gibbous10Thu
11Fri9:562.510:252.63:330.03:40-0.16:455:15Waning Gibbous11Fri
12Sat10:372.311:082.64:120.14:170.06:445:16Waning Gibbous12Sat
13Sun11:242.211:572.54:590.35:020.16:425:18Third Quarter13Sun
14Mon12:182.15:580.35:570.16:415:19Third Quarter14Mon
15Tue12:542.61:192.17:130.47:010.16:405:20Third Quarter15Tue
16Wed2:002.62:302.28:580.28:160.16:385:21Third Quarter16Wed
17Thu3:132.83:432.410:090.09:41-0.16:375:22Waning Crescent17Thu
18Fri4:223.14:472.711:03-0.310:52-0.46:365:24Waning Crescent18Fri
19Sat5:193.45:423.111:50-0.611:51-0.76:345:25Waning Crescent19Sat
20Sun6:113.66:343.412:36-0.86:335:26New Moon20Sun
21Mon7:013.77:233.712:46-0.91:19-0.96:315:27New Moon21Mon
22Tue7:503.78:123.81:38-1.02:00-1.06:305:29New Moon22Tue
23Wed8:383.69:013.72:28-0.92:39-0.96:285:30Waxing Crescent23Wed
24Thu9:263.39:503.63:18-0.83:18-0.86:275:31Waxing Crescent24Thu
25Fri10:163.010:423.34:11-0.53:57-0.56:255:32Waxing Crescent25Fri
26Sat11:092.711:383.05:13-0.24:40-0.26:245:33First Quarter26Sat
27Sun12:052.46:270.15:330.06:225:34First Quarter27Sun
28Mon12:372.71:062.27:400.36:450.26:215:36First Quarter28Mon
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 10:45 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 100% 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 Full Moon (100% 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