Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

60°
H 65°
L 58°
NNE
22mph
Low tide
10:20 am
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 58m at 10:20 am (0.9 ft)
Next high tide : 5:00 pm (2.7 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 - Oct 1857

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu5:173.25:403.411:300.111:52-0.15:475:32Waxing Gibbous1Thu
2Fri6:003.66:243.512:16-0.15:485:30Full Moon2Fri
3Sat6:443.97:093.612:25-0.31:03-0.35:495:29Full Moon3Sat
4Sun7:294.17:553.51:01-0.41:51-0.35:505:27Full Moon4Sun
5Mon8:154.28:433.41:40-0.42:38-0.35:515:25Waning Gibbous5Mon
6Tue9:044.19:333.22:21-0.33:29-0.15:525:24Waning Gibbous6Tue
7Wed9:563.910:283.03:05-0.24:300.15:535:22Waning Gibbous7Wed
8Thu10:553.611:292.83:540.05:530.35:545:21Third Quarter8Thu
9Fri12:013.44:540.37:130.55:555:19Third Quarter9Fri
10Sat12:352.71:123.16:250.58:230.55:565:17Third Quarter10Sat
11Sun1:452.72:273.08:100.59:230.55:575:16Third Quarter11Sun
12Mon2:572.83:363.09:260.510:140.45:585:14Waning Crescent12Mon
13Tue4:003.04:313.010:240.410:570.35:595:13Waning Crescent13Tue
14Wed4:533.25:173.011:130.311:330.26:015:11Waning Crescent14Wed
15Thu5:383.35:573.011:550.26:025:09Waning Crescent15Thu
16Fri6:183.56:343.012:030.112:330.26:035:08New Moon16Fri
17Sat6:553.57:083.012:280.11:060.26:045:06New Moon17Sat
18Sun7:293.57:422.912:510.11:370.26:055:05New Moon18Sun
19Mon8:013.48:152.81:150.12:070.26:065:03New Moon19Mon
20Tue8:323.38:502.71:440.22:370.36:075:02Waxing Crescent20Tue
21Wed9:053.19:262.52:170.33:090.46:085:00Waxing Crescent21Wed
22Thu9:412.910:072.32:520.53:470.66:104:59Waxing Crescent22Thu
23Fri10:242.810:542.23:300.64:340.86:114:58Waxing Crescent23Fri
24Sat11:162.611:492.24:150.85:470.96:124:56First Quarter24Sat
25Sun12:142.65:120.97:310.96:134:55First Quarter25Sun
26Mon12:492.21:172.66:250.98:310.76:144:53First Quarter26Mon
27Tue1:532.32:222.77:570.89:170.56:154:52First Quarter27Tue
28Wed2:582.63:252.89:230.69:550.36:174:51Waxing Gibbous28Wed
29Thu3:563.04:213.010:210.310:310.06:184:49Waxing Gibbous29Thu
30Fri4:463.45:103.211:120.011:08-0.26:194:48Waxing Gibbous30Fri
31Sat5:333.85:583.312:00-0.26:204:47Full Moon31Sat
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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