Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

65°
H -°
L 58°
NNE
8mph
High tide
1:53 am
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, September 18, 2026
The tide is currently rising in Block Island, RI.
Next low tide (tomorrow) : 7:10 am (1.0 ft)
Next high tide (tomorrow) : in 3h 42m at 1:53 am (2.1 ft)
Sunset today : 6:50 pm
Sunrise tomorrow : 6:30 am
Moon phase : First Quarter (48% 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 - Oct 1860

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon7:483.48:092.91:160.12:030.35:475:32Full Moon1Mon
2Tue8:193.38:432.81:450.22:320.35:485:30Waning Gibbous2Tue
3Wed8:533.29:212.72:160.23:030.55:495:28Waning Gibbous3Wed
4Thu9:323.110:032.52:510.33:380.65:505:27Waning Gibbous4Thu
5Fri10:163.010:532.43:300.44:220.75:515:25Waning Gibbous5Fri
6Sat11:092.911:502.44:160.65:240.85:525:23Third Quarter6Sat
7Sun12:092.95:140.67:130.85:535:22Third Quarter7Sun
8Mon12:522.51:142.96:250.78:320.65:545:20Third Quarter8Mon
9Tue1:592.62:233.07:490.69:260.45:555:18Third Quarter9Tue
10Wed3:072.93:313.29:160.410:120.25:565:17Waning Crescent10Wed
11Thu4:093.34:313.410:230.110:53-0.15:585:15Waning Crescent11Thu
12Fri5:023.75:243.511:19-0.211:34-0.35:595:14Waning Crescent12Fri
13Sat5:524.06:143.612:12-0.46:005:12New Moon13Sat
14Sun6:404.37:033.612:14-0.41:04-0.56:015:11New Moon14Sun
15Mon7:294.37:523.512:56-0.51:54-0.56:025:09New Moon15Mon
16Tue8:184.38:413.31:38-0.42:43-0.36:035:07Waxing Crescent16Tue
17Wed9:084.09:313.12:20-0.33:33-0.16:045:06Waxing Crescent17Wed
18Thu10:003.710:252.93:040.04:300.26:055:04Waxing Crescent18Thu
19Fri10:583.411:242.73:510.35:410.46:065:03First Quarter19Fri
20Sat12:013.04:510.56:520.66:085:02First Quarter20Sat
21Sun12:272.51:062.86:430.77:550.76:095:00First Quarter21Sun
22Mon1:332.52:122.78:060.88:500.76:104:59First Quarter22Mon
23Tue2:402.53:142.69:110.79:360.66:114:57Waxing Gibbous23Tue
24Wed3:402.64:062.610:030.710:140.56:124:56Waxing Gibbous24Wed
25Thu4:292.84:502.710:470.510:450.46:134:54Waxing Gibbous25Thu
26Fri5:093.05:272.711:260.411:140.36:154:53Waxing Gibbous26Fri
27Sat5:433.16:012.812:030.36:164:52Waxing Gibbous27Sat
28Sun6:143.36:342.812:390.26:174:50Full Moon28Sun
29Mon6:453.47:072.812:090.11:140.26:184:49Full Moon29Mon
30Tue7:173.47:422.812:400.11:470.26:194:48Full Moon30Tue
31Wed7:523.48:192.71:140.12:180.26:204:47Full Moon31Wed
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 neap phase. Tonight's moon is 48% 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 minimum.

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 (48% illuminated). This places Block Island, RI in a neap tide cycle, so tidal ranges are near their weekly minimum 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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