Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

67°
H -°
L 65°
SW
6mph
Low tide
5:19 am
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Thursday, September 17, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 4h 28m at 5:19 am (0.7 ft)
Next high tide : 12:35 pm (2.8 ft)
Sunset today : 6:52 pm
Sunrise tomorrow : 6:29 am
Moon phase : First Quarter (39% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Featured Local Businesses

New Harbor Great Salt Pond Block Island Aerial

New Shoreham (Block Island) Harbormaster
Champlins Marina Resort, docks filled on a sunny summer day

Champlin's Marina & Resort
Coast Guard Station, Point Judith Rhode Island,

USCG Station Point Judith, RI
Beach in East Hampton, NY -- Nicole Mayone, CC BY-SA 2.0 , via Wikimedia Commons

East Hampton Harbormaster

Block Island, RI Tides - Jun 1862

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun9:482.69:502.93:380.33:120.44:197:16Waxing Crescent1Sun
2Mon10:312.610:332.94:090.43:550.54:187:16Waxing Crescent2Mon
3Tue11:182.611:212.84:460.44:460.64:187:17Waxing Crescent3Tue
4Wed12:072.75:300.45:460.64:187:18First Quarter4Wed
5Thu12:122.712:582.86:190.46:550.64:177:19First Quarter5Thu
6Fri1:072.71:543.07:110.38:130.54:177:19First Quarter6Fri
7Sat2:082.72:553.38:070.29:300.34:177:20Waxing Gibbous7Sat
8Sun3:152.73:573.59:060.010:350.14:177:20Waxing Gibbous8Sun
9Mon4:202.84:553.810:06-0.111:33-0.14:167:21Waxing Gibbous9Mon
10Tue5:203.05:504.011:04-0.24:167:22Full Moon10Tue
11Wed6:163.26:444.212:28-0.312:00-0.44:167:22Full Moon11Wed
12Thu7:103.37:384.21:22-0.412:58-0.44:167:23Full Moon12Thu
13Fri8:033.48:304.12:13-0.51:54-0.44:167:23Full Moon13Fri
14Sat8:563.49:223.93:03-0.42:49-0.34:167:24Waning Gibbous14Sat
15Sun9:493.410:153.73:51-0.33:46-0.14:167:24Waning Gibbous15Sun
16Mon10:443.311:083.34:41-0.24:510.14:167:24Waning Gibbous16Mon
17Tue11:403.25:330.06:050.44:167:25Third Quarter17Tue
18Wed12:013.012:353.16:230.27:140.54:167:25Third Quarter18Wed
19Thu12:542.71:313.07:080.38:180.64:167:25Third Quarter19Thu
20Fri1:492.52:292.97:500.49:180.74:167:26Third Quarter20Fri
21Sat2:482.33:292.98:320.510:110.74:177:26Waning Crescent21Sat
22Sun3:492.34:232.99:170.510:590.64:177:26Waning Crescent22Sun
23Mon4:422.35:103.010:030.511:430.54:177:26Waning Crescent23Mon
24Tue5:292.45:523.110:480.44:177:26Waning Crescent24Tue
25Wed6:112.56:303.112:260.411:32 AM0.44:187:26New Moon25Wed
26Thu6:512.67:053.21:070.312:150.34:187:26New Moon26Thu
27Fri7:302.77:403.21:450.312:580.34:187:27New Moon27Fri
28Sat8:072.78:143.22:210.21:380.34:197:27New Moon28Sat
29Sun8:452.88:503.22:510.22:170.34:197:26Waxing Crescent29Sun
30Mon9:242.89:283.13:160.22:570.34:207:26Waxing Crescent30Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
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Common Questions About Block Island, RI Tides

Collapse All
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 39% 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 First Quarter (39% 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

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