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 - Mar 1857

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun11:132.611:413.25:10-0.24:42-0.36:245:41First Quarter1Sun
2Mon12:122.36:350.05:39-0.16:225:42First Quarter2Mon
3Tue12:443.01:172.27:590.26:530.16:215:43First Quarter3Tue
4Wed1:572.82:322.19:140.28:400.26:195:44First Quarter4Wed
5Thu3:192.73:472.210:180.210:040.16:185:45Waxing Gibbous5Thu
6Fri4:292.74:492.411:100.111:040.06:165:46Waxing Gibbous6Fri
7Sat5:242.85:402.711:55-0.111:53-0.16:145:48Waxing Gibbous7Sat
8Sun6:092.96:252.912:34-0.26:135:49Waxing Gibbous8Sun
9Mon6:492.97:063.012:36-0.21:07-0.36:115:50Full Moon9Mon
10Tue7:252.97:443.11:13-0.21:35-0.36:095:51Full Moon10Tue
11Wed7:582.98:183.11:46-0.21:58-0.36:085:52Full Moon11Wed
12Thu8:292.88:503.02:16-0.22:17-0.36:065:53Waning Gibbous12Thu
13Fri9:002.69:212.92:44-0.12:39-0.26:045:54Waning Gibbous13Fri
14Sat9:322.49:522.83:140.03:060.06:035:55Waning Gibbous14Sat
15Sun10:072.210:262.63:470.13:380.16:015:56Waning Gibbous15Sun
16Mon10:462.111:072.54:260.34:150.35:595:58Waning Gibbous16Mon
17Tue11:321.911:562.35:140.55:000.45:585:59Third Quarter17Tue
18Wed12:261.86:210.65:570.55:566:00Third Quarter18Wed
19Thu12:562.31:291.88:200.77:080.65:546:01Third Quarter19Thu
20Fri2:092.32:451.99:360.58:360.55:536:02Third Quarter20Fri
21Sat3:292.53:572.210:270.310:040.25:516:03Waning Crescent21Sat
22Sun4:312.84:532.611:070.011:03-0.15:496:04Waning Crescent22Sun
23Mon5:213.05:413.011:44-0.211:55-0.45:486:05Waning Crescent23Mon
24Tue6:063.36:263.412:20-0.55:466:06New Moon24Tue
25Wed6:523.47:123.712:44-0.612:56-0.75:446:07New Moon25Wed
26Thu7:383.47:583.91:33-0.71:32-0.85:436:08New Moon26Thu
27Fri8:243.38:443.92:20-0.82:10-0.85:416:09Waxing Crescent27Fri
28Sat9:123.19:333.83:08-0.62:50-0.65:396:10Waxing Crescent28Sat
29Sun10:032.910:263.64:01-0.43:33-0.45:386:12Waxing Crescent29Sun
30Mon10:582.711:253.35:05-0.24:22-0.25:366:13Waxing Crescent30Mon
31Tue11:592.56:250.15:240.15:346:14First 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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