Tides Today & Tomorrow in Block Island, RI

TIDE TIMES for Friday, June 26, 2026
The tide is currently falling in Block Island, RI.
Next low tide (tomorrow) : in 5h 44m at 12:51 am (0.5 ft)
Next high tide (tomorrow) : 6:39 am (2.3 ft)
Sunset today : 8:23 pm
Sunrise tomorrow : 5:15 am
Moon phase : Waxing Gibbous (90% illuminated)
Tide Station Location : Station #8459338
Common Questions About Tides

Block Island, RI Tides - Aug 2048

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat1:182.61:512.96:420.58:440.85:428:02Third Quarter1Sat
2Sun2:092.42:462.87:300.69:480.95:438:01Third Quarter2Sun
3Mon3:092.23:532.78:250.710:460.95:448:00Third Quarter3Mon
4Tue4:182.25:002.79:330.711:370.85:457:59Waning Crescent4Tue
5Wed5:192.35:522.810:450.75:467:57Waning Crescent5Wed
6Thu6:082.46:343.012:230.611:41 AM0.55:477:56Waning Crescent6Thu
7Fri6:502.67:103.11:040.512:290.45:487:55Waning Crescent7Fri
8Sat7:282.87:433.21:420.41:130.35:497:54New Moon8Sat
9Sun8:053.08:163.32:160.21:540.25:507:52New Moon9Sun
10Mon8:413.18:513.32:450.12:330.15:517:51New Moon10Mon
11Tue9:183.39:283.33:090.13:110.15:527:50Waxing Crescent11Tue
12Wed9:583.310:083.23:320.03:490.25:537:48Waxing Crescent12Wed
13Thu10:393.410:523.14:010.04:310.35:547:47Waxing Crescent13Thu
14Fri11:253.411:402.94:360.15:180.45:557:45Waxing Crescent14Fri
15Sat12:163.45:180.16:160.55:567:44First Quarter15Sat
16Sun12:342.81:123.46:090.27:330.55:577:43First Quarter16Sun
17Mon1:322.72:133.37:100.39:070.55:587:41First Quarter17Mon
18Tue2:372.73:223.48:210.310:230.45:597:40First Quarter18Tue
19Wed3:492.74:353.59:480.311:250.26:007:38Waxing Gibbous19Wed
20Thu5:012.95:403.611:110.16:017:37Waxing Gibbous20Thu
21Fri6:033.26:353.812:170.112:150.06:027:35Waxing Gibbous21Fri
22Sat6:573.57:253.81:05-0.11:11-0.26:037:34Full Moon22Sat
23Sun7:473.78:133.81:49-0.22:02-0.26:047:32Full Moon23Sun
24Mon8:343.88:583.72:29-0.32:50-0.26:057:31Full Moon24Mon
25Tue9:203.89:413.53:05-0.33:34-0.16:067:29Waning Gibbous25Tue
26Wed10:033.710:243.33:36-0.24:140.16:077:28Waning Gibbous26Wed
27Thu10:463.511:073.04:050.04:540.36:087:26Waning Gibbous27Thu
28Fri11:303.311:522.74:350.25:380.56:097:24Waning Gibbous28Fri
29Sat12:153.05:090.46:380.76:107:23Third Quarter29Sat
30Sun12:402.51:032.85:510.67:580.96:117:21Third Quarter30Sun
31Mon1:312.31:562.66:420.79:101.06:127:19Third Quarter31Mon
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 3:45 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 90% 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 Gibbous (90% 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