Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

66°
H -°
L 65°
SSE
6mph
High tide
9:19 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, September 12, 2026
The tide is currently rising in Block Island, RI.
Next low tide (tomorrow) : 3:14 am (-0.1 ft)
Next high tide : in 39m at 9:19 pm (3.4 ft)
Sunset today : 7:01 pm
Sunrise tomorrow : 6:24 am
Moon phase : New Moon (3% 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 - Aug 1871

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Tue7:373.58:044.01:47-0.31:38-0.34:457:07Full Moon1Tue
2Wed8:273.58:523.82:32-0.32:29-0.24:467:06Waning Gibbous2Wed
3Thu9:163.59:393.63:13-0.23:170.04:477:05Waning Gibbous3Thu
4Fri10:043.410:263.33:51-0.14:070.24:487:04Waning Gibbous4Fri
5Sat10:543.211:143.04:280.15:030.44:497:02Waning Gibbous5Sat
6Sun11:433.15:030.36:080.64:507:01Third Quarter6Sun
7Mon12:022.712:332.95:390.47:140.84:517:00Third Quarter7Mon
8Tue12:512.51:232.86:200.68:170.84:526:59Third Quarter8Tue
9Wed1:442.32:192.77:070.79:180.84:536:58Third Quarter9Wed
10Thu2:472.23:252.78:020.710:130.84:546:56Waning Crescent10Thu
11Fri3:532.24:242.89:070.711:010.74:556:55Waning Crescent11Fri
12Sat4:462.45:102.910:080.611:460.64:566:54Waning Crescent12Sat
13Sun5:302.55:503.111:000.54:576:52Waning Crescent13Sun
14Mon6:092.76:263.212:270.411:46 AM0.34:586:51New Moon14Mon
15Tue6:472.87:023.31:050.312:300.24:596:50New Moon15Tue
16Wed7:253.07:383.41:390.21:110.15:006:48New Moon16Wed
17Thu8:043.18:163.42:080.11:520.15:016:47New Moon17Thu
18Fri8:443.28:563.32:330.12:320.15:026:45Waxing Crescent18Fri
19Sat9:263.39:383.22:590.13:140.25:036:44Waxing Crescent19Sat
20Sun10:123.410:263.13:310.14:000.35:046:42Waxing Crescent20Sun
21Mon11:013.411:172.94:110.14:550.45:056:41Waxing Crescent21Mon
22Tue11:553.44:570.26:060.55:066:39First Quarter22Tue
23Wed12:142.812:533.45:530.27:360.55:076:38First Quarter23Wed
24Thu1:162.71:583.46:570.38:590.45:086:36First Quarter24Thu
25Fri2:252.73:093.48:140.310:060.35:096:35Waxing Gibbous25Fri
26Sat3:382.84:183.69:410.211:020.15:106:33Waxing Gibbous26Sat
27Sun4:433.05:173.710:500.111:530.05:116:32Waxing Gibbous27Sun
28Mon5:393.26:103.811:48-0.15:126:30Full Moon28Mon
29Tue6:303.46:583.912:40-0.112:41-0.25:136:28Full Moon29Tue
30Wed7:193.67:443.81:23-0.21:30-0.25:146:27Full Moon30Wed
31Thu8:053.68:283.72:01-0.22:15-0.15:156:25Full 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 spring phase. Tonight's moon is 3% 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 New Moon (3% 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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