Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, July 25, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 10:50 am (0.7 ft)
Next high tide : in 55m at 5:25 am (2.2 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 - Mar 1972

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:132.98:353.11:59-0.32:10-0.36:205:37Full Moon1Wed
2Thu8:452.79:073.02:29-0.22:30-0.36:185:38Waning Gibbous2Thu
3Fri9:172.69:392.82:57-0.12:54-0.26:165:39Waning Gibbous3Fri
4Sat9:502.410:122.63:280.03:230.06:155:40Waning Gibbous4Sat
5Sun10:272.210:492.54:040.23:580.26:135:41Waning Gibbous5Sun
6Mon11:082.011:332.44:470.44:380.36:125:42Third Quarter6Mon
7Tue11:561.95:420.55:280.46:105:44Third Quarter7Tue
8Wed12:262.312:531.87:080.66:300.56:085:45Third Quarter8Wed
9Thu1:302.22:011.89:000.67:460.56:075:46Third Quarter9Thu
10Fri2:482.33:182.010:000.49:210.36:055:47Waning Crescent10Fri
11Sat4:002.64:222.310:460.210:320.16:035:48Waning Crescent11Sat
12Sun4:542.85:132.711:24-0.111:25-0.26:025:49Waning Crescent12Sun
13Mon5:403.15:593.112:00-0.46:005:50Waning Crescent13Mon
14Tue6:253.36:443.512:14-0.512:35-0.65:585:51New Moon14Tue
15Wed7:103.47:303.71:02-0.71:11-0.75:575:53New Moon15Wed
16Thu7:553.48:163.91:50-0.81:48-0.85:555:54New Moon16Thu
17Fri8:423.39:033.82:36-0.72:27-0.85:535:55Waxing Crescent17Fri
18Sat9:313.19:533.73:25-0.63:08-0.65:525:56Waxing Crescent18Sat
19Sun10:232.910:483.44:19-0.43:53-0.45:505:57Waxing Crescent19Sun
20Mon11:202.611:493.25:31-0.14:46-0.25:485:58First Quarter20Mon
21Tue12:222.46:530.15:560.15:475:59First Quarter21Tue
22Wed12:562.91:292.48:070.27:410.25:456:00First Quarter22Wed
23Thu2:112.72:422.49:140.39:110.25:436:01First Quarter23Thu
24Fri3:272.63:522.510:110.210:170.25:426:02Waxing Gibbous24Fri
25Sat4:282.74:482.710:580.111:090.15:406:03Waxing Gibbous25Sat
26Sun5:172.75:362.911:380.011:530.05:386:04Waxing Gibbous26Sun
27Mon5:592.86:183.112:12-0.15:376:06Waxing Gibbous27Mon
28Tue6:372.86:563.212:32-0.112:41-0.15:356:07Full Moon28Tue
29Wed7:122.87:313.21:07-0.11:05-0.25:336:08Full Moon29Wed
30Thu7:452.78:033.21:39-0.11:28-0.25:326:09Full Moon30Thu
31Fri8:172.78:343.12:08-0.11:52-0.15:306:10Full Moon31Fri
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 8:07 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