Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

65°
H 66°
L 58°
NE
15mph
High tide
5:00 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Monday, September 21, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 11:26 pm (0.7 ft)
Next high tide : in 1h 37m at 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

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 - May 2089

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun12:362.61:082.36:500.56:250.75:427:44Third Quarter1Sun
2Mon1:242.51:592.38:010.67:370.85:417:45Third Quarter2Mon
3Tue2:172.42:542.39:010.69:190.85:407:46Third Quarter3Tue
4Wed3:162.33:542.49:540.510:320.65:387:47Third Quarter4Wed
5Thu4:202.44:502.610:390.411:260.55:377:48Waning Crescent5Thu
6Fri5:142.55:362.911:170.35:367:49Waning Crescent6Fri
7Sat6:002.76:183.212:120.311:54 AM0.15:357:50Waning Crescent7Sat
8Sun6:432.87:003.512:550.112:31-0.15:347:51New Moon8Sun
9Mon7:273.07:433.71:37-0.11:10-0.25:337:52New Moon9Mon
10Tue8:123.18:283.82:20-0.31:52-0.35:317:53New Moon10Tue
11Wed8:583.29:153.93:02-0.32:36-0.45:307:54New Moon11Wed
12Thu9:473.210:043.83:44-0.33:22-0.35:297:55Waxing Crescent12Thu
13Fri10:383.210:563.74:30-0.34:10-0.25:287:56Waxing Crescent13Fri
14Sat11:323.111:513.55:23-0.15:04-0.15:277:57Waxing Crescent14Sat
15Sun12:313.16:300.06:090.15:267:58First Quarter15Sun
16Mon12:503.31:313.17:410.07:380.25:267:59First Quarter16Mon
17Tue1:513.12:343.18:440.19:070.35:258:00First Quarter17Tue
18Wed2:562.93:403.29:430.110:190.25:248:01First Quarter18Wed
19Thu4:032.94:443.310:380.111:210.25:238:02Waxing Gibbous19Thu
20Fri5:072.85:413.511:270.05:228:03Waxing Gibbous20Fri
21Sat6:032.96:323.612:150.112:110.05:218:04Waxing Gibbous21Sat
22Sun6:522.97:183.61:030.012:510.05:218:05Full Moon22Sun
23Mon7:382.98:023.61:480.01:290.05:208:06Full Moon23Mon
24Tue8:222.98:443.52:290.02:030.05:198:06Full Moon24Tue
25Wed9:042.99:233.43:060.02:360.15:198:07Full Moon25Wed
26Thu9:452.810:013.23:400.03:090.25:188:08Waning Gibbous26Thu
27Fri10:252.710:393.14:120.13:440.35:178:09Waning Gibbous27Fri
28Sat11:052.611:182.94:450.24:220.55:178:10Waning Gibbous28Sat
29Sun11:482.511:592.75:220.45:050.65:168:11Waning Gibbous29Sun
30Mon12:322.56:050.55:550.75:168:11Third Quarter30Mon
31Tue12:422.61:172.56:530.56:560.85:158:12Third Quarter31Tue
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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