Nearby Harbors
41.1867’ N, 71.5783’ W

Block Island, RI

49°
H 51°
L 41°
NNW
14mph
Low tide
7:48 pm
Photo Credits

Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Saturday, October 17, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 5h 23m at 7:48 pm (0.9 ft)
Next high tide (tomorrow) : 1:18 am (2.1 ft)
Sunset today : 6:02 pm
Sunrise tomorrow : 7:00 am
Moon phase : First Quarter (41% 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 - Aug 1805

Print this Tide Chart
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Thu12:153.25:190.36:490.64:447:07First Quarter1Thu
2Fri12:262.51:093.06:010.57:540.84:457:06First Quarter2Fri
3Sat1:202.32:092.86:500.78:580.84:467:05First Quarter3Sat
4Sun2:232.23:172.87:510.89:560.84:477:04Waxing Gibbous4Sun
5Mon3:342.24:192.89:120.810:460.84:487:02Waxing Gibbous5Mon
6Tue4:342.35:092.910:160.711:300.64:497:01Waxing Gibbous6Tue
7Wed5:212.45:503.011:050.64:507:00Waxing Gibbous7Wed
8Thu6:022.66:273.112:110.511:50 AM0.44:516:59Full Moon8Thu
9Fri6:392.87:003.212:480.312:310.34:526:58Full Moon9Fri
10Sat7:142.97:323.31:210.21:100.34:536:56Full Moon10Sat
11Sun7:493.18:053.31:500.11:460.24:546:55Full Moon11Sun
12Mon8:253.28:403.22:140.12:210.34:556:54Waning Gibbous12Mon
13Tue9:023.29:183.12:380.12:570.34:566:52Waning Gibbous13Tue
14Wed9:423.310:013.03:070.13:360.44:576:51Waning Gibbous14Wed
15Thu10:263.310:482.83:420.14:210.54:586:49Waning Gibbous15Thu
16Fri11:163.311:422.74:240.25:190.64:596:48Third Quarter16Fri
17Sat12:113.35:150.26:380.65:016:47Third Quarter17Sat
18Sun12:402.61:123.36:150.38:200.65:026:45Third Quarter18Sun
19Mon1:462.62:223.37:240.39:350.55:036:44Waning Crescent19Mon
20Tue2:582.73:363.48:440.210:350.35:046:42Waning Crescent20Tue
21Wed4:092.94:423.610:050.111:260.05:056:41Waning Crescent21Wed
22Thu5:093.25:373.811:11-0.15:066:39Waning Crescent22Thu
23Fri6:033.56:283.912:14-0.112:08-0.35:076:38New Moon23Fri
24Sat6:533.77:163.912:58-0.31:01-0.35:086:36New Moon24Sat
25Sun7:413.98:023.71:38-0.31:51-0.35:096:35New Moon25Sun
26Mon8:283.98:463.52:15-0.32:36-0.25:106:33Waxing Crescent26Mon
27Tue9:133.89:293.32:47-0.23:200.05:116:32Waxing Crescent27Tue
28Wed9:583.610:143.03:160.04:030.35:126:30Waxing Crescent28Wed
29Thu10:453.311:002.73:460.24:510.55:136:28Waxing Crescent29Thu
30Fri11:353.111:492.54:210.45:560.75:146:27First Quarter30Fri
31Sat12:272.85:030.67:110.95:156:25First Quarter31Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

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The US Harbors tide chart design is protected by copyright. It may be printed for personal use only.
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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 neap phase. Tonight's moon is 41% 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 minimum.

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 First Quarter (41% illuminated). This places Block Island, RI in a neap tide cycle, so tidal ranges are near their weekly minimum 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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