Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

61°
H -°
L 58°
NE
15mph
Low tide
11:26 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Monday, September 21, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 3h 40m at 11:26 pm (0.7 ft)
Next high tide (tomorrow) : 5:15 am (2.4 ft)
Sunset today : 6:45 pm
Sunrise tomorrow : 6:33 am
Moon phase : Waxing Gibbous (75% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Featured Local Businesses

Champlins Marina Resort, docks filled on a sunny summer day

Champlin's Marina & Resort
New Harbor Great Salt Pond Block Island Aerial

New Shoreham (Block Island) Harbormaster
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 - Oct 1856

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed8:283.38:402.81:500.22:300.35:475:32Waxing Crescent1Wed
2Thu8:593.29:152.72:180.33:020.45:485:30Waxing Crescent2Thu
3Fri9:333.19:532.52:490.43:360.55:495:28Waxing Crescent3Fri
4Sat10:133.010:382.43:240.54:180.75:505:27Waxing Crescent4Sat
5Sun11:022.911:312.34:050.65:120.85:515:25First Quarter5Sun
6Mon11:592.84:560.76:380.95:525:23First Quarter6Mon
7Tue12:312.31:032.86:020.88:200.85:535:22First Quarter7Tue
8Wed1:382.42:132.97:210.79:210.65:545:20First Quarter8Wed
9Thu2:492.63:243.18:540.610:080.35:555:19Waxing Gibbous9Thu
10Fri3:552.94:243.310:080.310:490.05:565:17Waxing Gibbous10Fri
11Sat4:493.35:163.511:060.011:28-0.25:585:15Waxing Gibbous11Sat
12Sun5:393.86:053.711:58-0.35:595:14Full Moon12Sun
13Mon6:274.16:533.712:07-0.412:50-0.56:005:12Full Moon13Mon
14Tue7:144.37:413.612:47-0.51:41-0.56:015:11Full Moon14Tue
15Wed8:024.38:303.51:27-0.52:31-0.46:025:09Waning Gibbous15Wed
16Thu8:514.29:213.22:09-0.43:23-0.26:035:08Waning Gibbous16Thu
17Fri9:433.910:143.02:52-0.24:210.06:045:06Waning Gibbous17Fri
18Sat10:393.611:132.73:380.15:340.36:055:05Waning Gibbous18Sat
19Sun11:433.24:320.46:500.56:065:03Third Quarter19Sun
20Mon12:172.612:512.95:560.67:580.66:085:02Third Quarter20Mon
21Tue1:242.52:032.87:440.78:580.66:095:00Third Quarter21Tue
22Wed2:332.53:122.78:580.79:490.66:104:59Third Quarter22Wed
23Thu3:372.74:082.79:560.610:290.56:114:57Waning Crescent23Thu
24Fri4:292.84:532.710:420.511:030.46:124:56Waning Crescent24Fri
25Sat5:123.05:302.811:220.411:310.36:134:54Waning Crescent25Sat
26Sun5:493.26:042.811:580.311:560.26:154:53Waning Crescent26Sun
27Mon6:233.36:352.812:330.26:164:52New Moon27Mon
28Tue6:543.47:062.812:190.21:070.26:174:50New Moon28Tue
29Wed7:243.47:382.812:450.11:400.16:184:49New Moon29Wed
30Thu7:553.38:132.71:140.22:110.26:194:48New Moon30Thu
31Fri8:293.38:502.61:460.22:430.36:204:47Waxing Crescent31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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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 75% 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 Waxing Gibbous (75% 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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