Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, July 17, 2026
The tide is currently falling in Block Island, RI.
Next low tide : in 2h 56m at 4:39 am (-0.2 ft)
Next high tide : 10:40 am (3.5 ft)
Sunset today : 8:16 pm
Sunrise tomorrow : 5:28 am
Moon phase : Waxing Crescent (14% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Nov 2076

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sun10:193.410:492.73:210.24:280.36:184:40Waxing Crescent1Sun
2Mon11:173.211:502.64:130.35:440.46:194:39First Quarter2Mon
3Tue12:203.15:180.47:160.46:214:38First Quarter3Tue
4Wed12:552.71:273.16:460.58:250.36:224:37First Quarter4Wed
5Thu2:042.82:363.18:340.49:220.16:234:36First Quarter5Thu
6Fri3:123.13:433.29:480.210:11-0.16:244:35Waxing Gibbous6Fri
7Sat4:143.44:403.310:460.010:54-0.26:254:34Waxing Gibbous7Sat
8Sun5:073.75:313.311:39-0.211:34-0.36:274:33Waxing Gibbous8Sun
9Mon5:563.96:193.312:28-0.36:284:32Full Moon9Mon
10Tue6:424.07:063.312:12-0.41:14-0.36:294:31Full Moon10Tue
11Wed7:263.97:513.212:49-0.31:58-0.36:304:30Full Moon11Wed
12Thu8:103.88:363.01:25-0.32:39-0.26:314:29Waning Gibbous12Thu
13Fri8:533.59:212.82:01-0.13:190.06:334:28Waning Gibbous13Fri
14Sat9:373.210:092.62:380.14:010.36:344:27Waning Gibbous14Sat
15Sun10:233.011:002.43:170.34:550.56:354:26Waning Gibbous15Sun
16Mon11:132.711:562.34:010.56:090.66:364:25Third Quarter16Mon
17Tue12:072.54:550.77:140.76:374:25Third Quarter17Tue
18Wed12:552.21:042.46:100.88:100.76:384:24Third Quarter18Wed
19Thu1:552.32:052.37:530.88:580.66:404:23Third Quarter19Thu
20Fri2:562.43:072.39:050.79:390.56:414:22Third Quarter20Fri
21Sat3:482.53:582.49:590.610:140.46:424:22Waning Crescent21Sat
22Sun4:292.84:402.510:450.410:430.26:434:21Waning Crescent22Sun
23Mon5:053.05:182.611:270.211:110.16:444:21Waning Crescent23Mon
24Tue5:413.35:562.712:070.06:454:20New Moon24Tue
25Wed6:183.56:362.812:47-0.16:464:20New Moon25Wed
26Thu6:583.67:182.912:18-0.21:26-0.26:474:19New Moon26Thu
27Fri7:403.78:032.912:57-0.22:05-0.26:494:19New Moon27Fri
28Sat8:263.78:502.91:39-0.32:46-0.26:504:18Waxing Crescent28Sat
29Sun9:143.69:412.82:23-0.23:31-0.16:514:18Waxing Crescent29Sun
30Mon10:073.410:362.83:11-0.14:250.06:524:18Waxing Crescent30Mon
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 7:39 am — 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 spring phase. Tonight's moon is 14% 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 maximum.

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 Crescent (14% illuminated). This places Block Island, RI in a spring tide cycle, so tidal ranges are near their weekly maximum 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