Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

58°
H -°
L 57°
ESE
7mph
Low tide
9:44 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, September 19, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 1h 47m at 9:44 pm (1.0 ft)
Next high tide (tomorrow) : 3:01 am (2.1 ft)
Sunset today : 6:49 pm
Sunrise tomorrow : 6:31 am
Moon phase : First Quarter (58% 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 - Sep 1858

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed12:502.61:223.36:210.48:420.65:166:23Third Quarter1Wed
2Thu1:582.62:363.37:380.49:500.55:176:22Waning Crescent2Thu
3Fri3:132.73:523.49:100.310:450.35:186:20Waning Crescent3Fri
4Sat4:213.04:543.610:260.111:340.15:196:18Waning Crescent4Sat
5Sun5:193.35:473.711:26-0.15:206:17Waning Crescent5Sun
6Mon6:103.56:343.712:19-0.112:19-0.25:216:15New Moon6Mon
7Tue6:583.77:193.712:59-0.21:09-0.25:226:13New Moon7Tue
8Wed7:433.88:023.61:36-0.21:54-0.25:236:12New Moon8Wed
9Thu8:273.88:433.32:07-0.22:35-0.15:246:10Waxing Crescent9Thu
10Fri9:093.79:243.12:35-0.13:140.15:256:08Waxing Crescent10Fri
11Sat9:513.510:062.83:010.13:520.45:266:07Waxing Crescent11Sat
12Sun10:343.210:502.63:300.34:330.65:276:05Waxing Crescent12Sun
13Mon11:202.911:382.34:060.55:290.85:286:03First Quarter13Mon
14Tue12:112.74:490.76:581.05:296:02First Quarter14Tue
15Wed12:322.21:112.65:440.98:171.05:306:00First Quarter15Wed
16Thu1:352.12:292.56:561.09:220.95:315:58First Quarter16Thu
17Fri2:542.13:432.68:471.010:130.85:325:56Waxing Gibbous17Fri
18Sat4:002.34:332.89:570.810:540.75:335:55Waxing Gibbous18Sat
19Sun4:462.55:122.910:470.611:290.55:345:53Waxing Gibbous19Sun
20Mon5:242.85:453.111:290.45:355:51Waxing Gibbous20Mon
21Tue5:583.16:193.212:000.312:100.25:365:50Full Moon21Tue
22Wed6:343.36:543.312:270.112:490.15:375:48Full Moon22Wed
23Thu7:113.67:323.312:540.01:270.05:385:46Full Moon23Thu
24Fri7:503.78:123.21:23-0.12:050.05:395:44Full Moon24Fri
25Sat8:313.88:563.11:56-0.12:450.15:405:43Waning Gibbous25Sat
26Sun9:153.79:433.02:32-0.13:270.25:415:41Waning Gibbous26Sun
27Mon10:053.610:362.83:140.04:190.45:425:39Waning Gibbous27Mon
28Tue11:013.511:362.74:010.15:370.55:435:38Third Quarter28Tue
29Wed12:043.34:590.37:180.65:445:36Third Quarter29Wed
30Thu12:412.71:143.26:150.48:320.55:455:34Third Quarter30Thu
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 58% 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 (58% 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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