Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

76°
H 76°
L 57°
WSW
6mph
Low tide
8:31 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, September 18, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 6h 30m at 8:31 pm (1.0 ft)
Next high tide (tomorrow) : 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 - Jun 1861

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat1:432.52:212.77:540.58:590.74:197:16Third Quarter1Sat
2Sun2:392.33:172.88:320.59:530.74:187:17Waning Crescent2Sun
3Mon3:372.34:082.89:110.510:410.64:187:17Waning Crescent3Mon
4Tue4:282.34:513.09:520.511:250.54:187:18Waning Crescent4Tue
5Wed5:132.45:303.110:340.44:177:19Waning Crescent5Wed
6Thu5:532.46:073.212:090.411:15 AM0.34:177:19New Moon6Thu
7Fri6:322.56:443.312:510.311:57 AM0.24:177:20New Moon7Fri
8Sat7:112.67:223.31:320.212:390.24:177:21New Moon8Sat
9Sun7:512.78:013.32:100.21:210.24:167:21New Moon9Sun
10Mon8:322.78:423.32:440.22:030.24:167:22Waxing Crescent10Mon
11Tue9:152.89:243.33:150.22:450.24:167:22Waxing Crescent11Tue
12Wed10:012.810:103.23:460.23:310.34:167:23Waxing Crescent12Wed
13Thu10:512.911:003.14:230.24:230.44:167:23Waxing Crescent13Thu
14Fri11:443.011:533.05:080.25:260.44:167:24First Quarter14Fri
15Sat12:393.15:580.26:410.54:167:24First Quarter15Sat
16Sun12:502.91:363.36:510.18:040.44:167:24First Quarter16Sun
17Mon1:502.82:383.47:480.19:220.34:167:25Waxing Gibbous17Mon
18Tue2:582.73:423.68:510.010:280.14:167:25Waxing Gibbous18Tue
19Wed4:062.84:443.89:550.011:260.04:167:25Waxing Gibbous19Wed
20Thu5:082.95:403.910:55-0.14:167:26Waxing Gibbous20Thu
21Fri6:043.06:344.012:21-0.211:53 AM-0.24:177:26Full Moon21Fri
22Sat6:573.27:264.01:13-0.212:49-0.24:177:26Full Moon22Sat
23Sun7:493.28:153.92:01-0.21:43-0.24:177:26Full Moon23Sun
24Mon8:383.29:023.72:46-0.22:310.04:177:26Waning Gibbous24Mon
25Tue9:273.29:493.43:27-0.13:170.14:187:26Waning Gibbous25Tue
26Wed10:153.110:343.24:070.04:040.34:187:26Waning Gibbous26Wed
27Thu11:043.011:202.94:450.24:570.54:197:27Waning Gibbous27Thu
28Fri11:522.95:210.36:010.74:197:27Third Quarter28Fri
29Sat12:052.612:392.85:560.47:060.84:197:26Third Quarter29Sat
30Sun12:492.41:242.76:320.58:090.84:207:26Third Quarter30Sun
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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