Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

77°
H 78°
L 65°
SW
8mph
High tide
6:20 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Monday, August 24, 2026
The tide is currently rising in Block Island, RI.
Next low tide (tomorrow) : 12:42 am (0.6 ft)
Next high tide : in 6h 32m at 6:20 pm (2.9 ft)
Sunset today : 7:32 pm
Sunrise tomorrow : 6:05 am
Moon phase : Waxing Gibbous (88% 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 - Sep 1917

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat6:493.97:164.012:44-0.41:03-0.45:126:20Full Moon1Sat
2Sun7:394.18:043.91:26-0.51:56-0.55:136:18Full Moon2Sun
3Mon8:274.28:533.72:06-0.52:47-0.45:146:17Waning Gibbous3Mon
4Tue9:174.19:423.42:45-0.43:40-0.25:156:15Waning Gibbous4Tue
5Wed10:083.910:343.13:24-0.24:390.15:166:13Waning Gibbous5Wed
6Thu11:033.611:302.84:060.05:510.45:176:12Third Quarter6Thu
7Fri12:023.34:550.37:040.65:186:10Third Quarter7Fri
8Sat12:292.61:063.06:000.58:130.75:196:08Third Quarter8Sat
9Sun1:332.52:182.97:330.79:150.85:206:07Third Quarter9Sun
10Mon2:432.53:292.88:550.710:090.75:216:05Waning Crescent10Mon
11Tue3:492.54:272.89:570.710:530.65:226:03Waning Crescent11Tue
12Wed4:422.75:122.910:450.611:300.55:236:02Waning Crescent12Wed
13Thu5:272.95:503.011:260.55:246:00Waning Crescent13Thu
14Fri6:063.06:233.112:030.412:040.45:255:58New Moon14Fri
15Sat6:413.26:543.112:330.312:400.35:265:56New Moon15Sat
16Sun7:143.37:243.112:580.21:150.25:275:55New Moon16Sun
17Mon7:453.37:553.01:210.21:480.25:285:53New Moon17Mon
18Tue8:163.38:282.91:440.22:190.35:295:51Waxing Crescent18Tue
19Wed8:503.39:042.82:110.22:510.35:305:50Waxing Crescent19Wed
20Thu9:273.29:442.72:420.33:260.55:315:48Waxing Crescent20Thu
21Fri10:093.110:312.63:180.44:080.65:325:46Waxing Crescent21Fri
22Sat10:593.111:242.54:000.55:010.75:335:44First Quarter22Sat
23Sun11:563.04:520.56:150.85:345:43First Quarter23Sun
24Mon12:242.512:593.05:570.67:550.75:355:41First Quarter24Mon
25Tue1:302.62:073.17:150.69:060.55:365:39First Quarter25Tue
26Wed2:412.83:183.38:470.410:010.25:375:38Waxing Gibbous26Wed
27Thu3:493.14:213.510:060.210:470.05:385:36Waxing Gibbous27Thu
28Fri4:473.55:153.611:06-0.111:30-0.35:395:34Waxing Gibbous28Fri
29Sat5:393.86:063.812:01-0.35:405:32Full Moon29Sat
30Sun6:294.16:553.812:11-0.412:53-0.45:415:31Full Moon30Sun
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.
Any commercial use, modification, redistribution, or repackaging without written permission is strictly prohibited.

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 spring phase. Tonight's moon is 88% 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 maximum.

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 (88% illuminated). This places Block Island, RI in a spring tide cycle, so tidal ranges are near their weekly maximum 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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