Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Thursday, July 9, 2026
The tide is currently rising in Block Island, RI.
Next low tide (tomorrow) : 9:42 am (0.1 ft)
Next high tide (tomorrow) : in 4h 10m at 4:04 am (2.6 ft)
Sunset today : 8:20 pm
Sunrise tomorrow : 5:22 am
Moon phase : Waning Crescent (30% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Jan 2068

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun4:002.84:202.310:490.110:070.07:114:28Waning Crescent1Sun
2Mon4:533.15:142.511:36-0.111:00-0.37:114:28Waning Crescent2Mon
3Tue5:433.46:032.712:21-0.37:114:29New Moon3Tue
4Wed6:313.66:523.01:04-0.57:114:30New Moon4Wed
5Thu7:193.77:413.212:42-0.61:47-0.77:114:31New Moon5Thu
6Fri8:073.78:303.31:33-0.72:28-0.77:114:32New Moon6Fri
7Sat8:553.79:213.32:23-0.73:09-0.77:114:33Waxing Crescent7Sat
8Sun9:463.510:143.33:15-0.63:52-0.67:114:34Waxing Crescent8Sun
9Mon10:383.211:093.24:13-0.44:38-0.57:114:35Waxing Crescent9Mon
10Tue11:342.95:28-0.25:32-0.37:104:36First Quarter10Tue
11Wed12:083.112:332.66:550.06:33-0.27:104:37First Quarter11Wed
12Thu1:103.01:352.48:120.17:41-0.17:104:38First Quarter12Thu
13Fri2:172.92:442.39:210.18:540.07:104:39Waxing Gibbous13Fri
14Sat3:282.93:532.310:220.19:580.07:094:40Waxing Gibbous14Sat
15Sun4:312.94:512.411:150.010:530.07:094:42Waxing Gibbous15Sun
16Mon5:242.95:422.512:010.07:084:43Waxing Gibbous16Mon
17Tue6:103.06:272.612:43-0.17:084:44Full Moon17Tue
18Wed6:523.07:092.712:20-0.21:20-0.27:074:45Full Moon18Wed
19Thu7:293.07:482.712:57-0.21:52-0.27:074:46Full Moon19Thu
20Fri8:033.08:252.71:30-0.22:21-0.37:064:47Full Moon20Fri
21Sat8:352.99:002.72:02-0.22:45-0.27:064:49Waning Gibbous21Sat
22Sun9:062.79:342.62:34-0.13:06-0.27:054:50Waning Gibbous22Sun
23Mon9:382.610:092.53:090.03:31-0.17:044:51Waning Gibbous23Mon
24Tue10:132.410:462.53:460.14:010.07:034:52Waning Gibbous24Tue
25Wed10:532.211:282.44:280.34:380.17:034:53Third Quarter25Wed
26Thu11:382.15:180.45:220.27:024:55Third Quarter26Thu
27Fri12:152.412:292.06:190.56:140.27:014:56Third Quarter27Fri
28Sat1:082.41:281.97:400.57:140.27:004:57Third Quarter28Sat
29Sun2:112.52:372.09:190.38:230.16:594:58Waning Crescent29Sun
30Mon3:222.73:492.210:220.19:39-0.16:585:00Waning Crescent30Mon
31Tue4:273.04:502.511:12-0.210:45-0.36:575:01Waning Crescent31Tue
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 6:53 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 30% 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 (30% 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