Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Thursday, July 23, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 10:48 pm (0.8 ft)
Next high tide : in 5h 24m at 4:05 pm (2.8 ft)
Sunset today : 8:12 pm
Sunrise tomorrow : 5:33 am
Moon phase : Waxing Gibbous (71% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Jun 1975

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun1:192.61:542.57:320.58:060.85:158:12Third Quarter1Sun
2Mon2:052.42:422.68:140.69:190.85:158:12Third Quarter2Mon
3Tue2:562.33:342.68:570.610:210.75:148:13Third Quarter3Tue
4Wed3:542.34:282.89:430.511:150.65:148:14Waning Crescent4Wed
5Thu4:522.35:172.910:300.45:148:15Waning Crescent5Thu
6Fri5:422.46:003.112:030.511:16 AM0.35:138:15Waning Crescent6Fri
7Sat6:262.66:423.312:480.312:000.25:138:16Waning Crescent7Sat
8Sun7:102.77:253.51:320.212:440.15:138:16New Moon8Sun
9Mon7:542.98:093.62:140.01:29-0.15:138:17New Moon9Mon
10Tue8:393.08:543.72:540.02:15-0.15:138:18New Moon10Tue
11Wed9:263.19:413.73:32-0.13:02-0.15:128:18Waxing Crescent11Wed
12Thu10:143.210:293.64:11-0.13:50-0.15:128:19Waxing Crescent12Thu
13Fri11:053.211:203.54:52-0.14:420.05:128:19Waxing Crescent13Fri
14Sat12:003.35:380.05:410.25:128:20Waxing Crescent14Sat
15Sun12:143.312:573.36:320.06:570.35:128:20First Quarter15Sun
16Mon1:113.11:553.47:290.08:240.35:128:20First Quarter16Mon
17Tue2:102.92:563.48:270.19:410.35:128:21First Quarter17Tue
18Wed3:132.84:003.59:280.110:480.35:128:21Waxing Gibbous18Wed
19Thu4:212.75:043.610:300.111:470.25:138:21Waxing Gibbous19Thu
20Fri5:252.86:013.611:270.15:138:22Waxing Gibbous20Fri
21Sat6:222.96:543.712:410.112:190.05:138:22Waxing Gibbous21Sat
22Sun7:143.07:433.71:300.01:090.05:138:22Full Moon22Sun
23Mon8:033.08:293.62:160.01:550.05:138:22Full Moon23Mon
24Tue8:503.09:133.52:580.02:380.15:148:22Full Moon24Tue
25Wed9:343.09:543.43:360.03:160.25:148:23Waning Gibbous25Wed
26Thu10:173.010:333.24:100.13:510.35:148:23Waning Gibbous26Thu
27Fri10:592.911:123.04:420.24:270.45:158:23Waning Gibbous27Fri
28Sat11:412.811:522.85:120.35:080.65:158:23Waning Gibbous28Sat
29Sun12:232.75:440.45:560.75:168:23Third Quarter29Sun
30Mon12:322.61:042.76:220.46:570.85:168:23Third Quarter30Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

Common Questions About Block Island, RI Tides

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What time does the tide turn (slack tide) in Block Island, RI today?

Slack tide in Block Island, RI is approximately 7:26 pm — midway between the next high and low tide, when tidal current is weakest. This is the preferred window for boat crossings, underwater visibility, and fishing in areas with strong currents.

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 71% 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 (71% 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