Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, July 24, 2026
The tide is currently rising in Block Island, RI.
Next low tide : 11:40 pm (0.8 ft)
Next high tide : in 4h 51m at 5:08 pm (2.8 ft)
Sunset today : 8:11 pm
Sunrise tomorrow : 5:34 am
Moon phase : Waxing Gibbous (79% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Jun 1973

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Fri8:163.38:374.22:28-0.41:55-0.55:158:12New Moon1Fri
2Sat9:083.39:304.13:20-0.52:49-0.55:158:13New Moon2Sat
3Sun10:013.410:233.94:10-0.43:44-0.45:148:14Waxing Crescent3Sun
4Mon10:553.311:183.75:02-0.34:41-0.25:148:14Waxing Crescent4Mon
5Tue11:523.35:58-0.25:480.05:148:15Waxing Crescent5Tue
6Wed12:143.412:513.26:550.07:070.25:138:16First Quarter6Wed
7Thu1:103.11:493.27:500.18:210.45:138:16First Quarter7Thu
8Fri2:062.82:483.18:410.29:290.55:138:17First Quarter8Fri
9Sat3:052.63:493.19:290.310:310.55:138:17First Quarter9Sat
10Sun4:072.44:483.110:150.411:250.55:138:18Waxing Gibbous10Sun
11Mon5:062.45:403.110:580.45:128:18Waxing Gibbous11Mon
12Tue5:582.46:273.212:120.511:37 AM0.45:128:19Waxing Gibbous12Tue
13Wed6:442.57:093.212:550.412:150.45:128:19Waxing Gibbous13Wed
14Thu7:262.57:493.21:360.412:530.45:128:20Full Moon14Thu
15Fri8:062.68:273.22:150.31:330.35:128:20Full Moon15Fri
16Sat8:442.69:023.22:520.32:130.35:128:21Full Moon16Sat
17Sun9:222.79:363.13:280.22:510.45:128:21Full Moon17Sun
18Mon9:592.610:113.14:000.33:290.45:128:21Waning Gibbous18Mon
19Tue10:372.610:483.04:300.34:070.55:138:22Waning Gibbous19Tue
20Wed11:172.711:282.94:590.34:490.65:138:22Waning Gibbous20Wed
21Thu12:012.75:320.35:370.75:138:22Waning Gibbous21Thu
22Fri12:132.812:472.86:110.36:340.75:138:22Third Quarter22Fri
23Sat1:012.71:362.96:560.37:410.75:148:22Third Quarter23Sat
24Sun1:542.62:293.17:460.39:000.65:148:23Third Quarter24Sun
25Mon2:532.63:293.38:410.210:230.45:148:23Waning Crescent25Mon
26Tue4:002.64:343.59:410.111:290.25:158:23Waning Crescent26Tue
27Wed5:072.85:363.710:450.05:158:23Waning Crescent27Wed
28Thu6:083.06:353.912:270.011:47 AM-0.25:158:23Waning Crescent28Thu
29Fri7:053.27:304.11:23-0.212:46-0.35:168:23New Moon29Fri
30Sat8:003.38:244.22:16-0.31:46-0.45:168:23New Moon30Sat
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8459338)

Common Questions About Block Island, RI Tides

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

Slack tide in Block Island, RI is approximately 8:24 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 79% 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 (79% 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