Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

61°
H -°
L 57°
NE
13mph
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 1h 14m 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

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 - Jul 1856

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue6:302.96:553.712:520.012:090.04:207:26New Moon1Tue
2Wed7:203.07:433.61:390.012:590.14:217:26New Moon2Wed
3Thu8:073.08:283.52:220.01:460.14:227:26New Moon3Thu
4Fri8:533.09:113.33:020.12:280.24:227:26Waxing Crescent4Fri
5Sat9:392.99:513.13:400.23:080.34:237:25Waxing Crescent5Sat
6Sun10:242.810:312.94:150.33:480.54:237:25Waxing Crescent6Sun
7Mon11:092.711:112.74:500.44:340.64:247:25Waxing Crescent7Mon
8Tue11:532.711:502.65:220.55:300.84:257:24First Quarter8Tue
9Wed12:352.75:540.56:340.84:257:24First Quarter9Wed
10Thu12:312.41:172.76:300.67:420.84:267:24First Quarter10Thu
11Fri1:172.32:032.77:110.68:510.84:277:23First Quarter11Fri
12Sat2:112.22:572.87:580.69:540.74:287:23Waxing Gibbous12Sat
13Sun3:142.23:553.08:520.610:470.64:287:22Waxing Gibbous13Sun
14Mon4:162.34:483.19:490.511:360.44:297:22Waxing Gibbous14Mon
15Tue5:092.45:373.410:440.34:307:21Waxing Gibbous15Tue
16Wed5:572.66:243.512:220.311:35 AM0.24:317:20Full Moon16Wed
17Thu6:452.87:113.71:070.112:270.04:327:20Full Moon17Thu
18Fri7:333.07:583.81:490.01:18-0.14:327:19Full Moon18Fri
19Sat8:213.28:453.82:28-0.12:09-0.14:337:18Waning Gibbous19Sat
20Sun9:103.39:323.73:07-0.23:00-0.14:347:18Waning Gibbous20Sun
21Mon10:013.410:223.53:45-0.23:540.14:357:17Waning Gibbous21Mon
22Tue10:543.511:153.24:26-0.15:000.24:367:16Waning Gibbous22Tue
23Wed11:493.55:12-0.16:210.34:377:15Third Quarter23Wed
24Thu12:103.012:463.56:020.07:400.44:387:14Third Quarter24Thu
25Fri1:082.71:463.46:560.28:530.44:397:13Third Quarter25Fri
26Sat2:122.62:543.47:570.39:590.44:407:12Waning Crescent26Sat
27Sun3:222.54:023.49:070.310:580.44:407:12Waning Crescent27Sun
28Mon4:282.65:033.410:160.311:500.34:417:11Waning Crescent28Mon
29Tue5:252.75:563.411:150.34:427:10Waning Crescent29Tue
30Wed6:162.96:443.412:380.312:070.24:437:08New Moon30Wed
31Thu7:033.07:273.41:210.212:540.24:447:07New Moon31Thu
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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