Tides Today & Tomorrow in Nantucket, MA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently rising in Nantucket, MA.
Next low tide : 12:22 pm (0.9 ft)
Next high tide : in 1h 28m at 6:58 am (2.7 ft)
Sunset today : 7:32 pm
Sunrise tomorrow : 5:54 am
Moon phase : First Quarter (55% illuminated)
Tide Station Location : Station #8449130
Common Questions About Tides

Nantucket, MA Tides - Mar 1941

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat2:073.02:252.97:530.18:110.26:145:30Waxing Crescent1Sat
2Sun2:453.13:072.88:390.18:530.36:135:31Waxing Crescent2Sun
3Mon3:263.13:522.79:260.29:370.46:115:33Waxing Crescent3Mon
4Tue4:113.04:392.610:140.210:220.56:105:34First Quarter4Tue
5Wed4:583.05:292.511:030.311:080.56:085:35First Quarter5Wed
6Thu5:463.06:212.411:530.311:560.66:075:36First Quarter6Thu
7Fri6:383.17:152.412:460.36:055:37First Quarter7Fri
8Sat7:313.18:082.412:470.51:390.26:035:38Waxing Gibbous8Sat
9Sun8:243.28:592.61:410.42:310.16:025:39Waxing Gibbous9Sun
10Mon9:163.49:492.72:350.33:200.06:005:40Waxing Gibbous10Mon
11Tue10:073.510:383.03:270.14:06-0.25:585:42Waxing Gibbous11Tue
12Wed10:593.611:273.24:18-0.24:53-0.35:575:43Full Moon12Wed
13Thu11:523.65:10-0.45:40-0.45:555:44Full Moon13Thu
14Fri12:173.512:453.66:02-0.66:28-0.55:535:45Full Moon14Fri
15Sat1:063.71:373.66:55-0.77:17-0.55:525:46Waning Gibbous15Sat
16Sun1:573.82:303.47:49-0.78:08-0.45:505:47Waning Gibbous16Sun
17Mon2:503.93:273.38:46-0.79:01-0.35:485:48Waning Gibbous17Mon
18Tue3:463.84:273.19:45-0.69:58-0.25:475:49Third Quarter18Tue
19Wed4:453.85:283.010:45-0.410:570.05:455:50Third Quarter19Wed
20Thu5:463.76:312.911:45-0.311:560.15:435:52Third Quarter20Thu
21Fri6:483.57:352.812:48-0.15:425:53Third Quarter21Fri
22Sat7:523.48:362.912:590.21:510.05:405:54Waning Crescent22Sat
23Sun8:523.49:322.92:020.22:490.05:385:55Waning Crescent23Sun
24Mon9:483.310:212.93:010.23:390.15:375:56Waning Crescent24Mon
25Tue10:393.211:063.03:530.14:240.15:355:57Waning Crescent25Tue
26Wed11:253.111:463.04:400.15:040.15:335:58New Moon26Wed
27Thu12:083.05:240.05:430.25:325:59New Moon27Thu
28Fri12:233.112:463.06:060.06:200.25:306:00New Moon28Fri
29Sat12:573.11:232.96:470.06:580.35:286:01New Moon29Sat
30Sun1:333.22:012.87:280.07:370.45:266:02Waxing Crescent30Sun
31Mon2:093.22:402.78:100.08:170.45:256:03Waxing Crescent31Mon
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8449130)

Common Questions About Nantucket, MA Tides

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What time does the tide turn (slack tide) in Nantucket, MA today?

Slack tide in Nantucket, MA is approximately 9:40 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 Nantucket, MA?

Nantucket, MA is currently in a neap phase. Tonight's moon is 55% 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 Nantucket, MA 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 Nantucket, MA?

Tide predictions for Nantucket, MA 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 Nantucket, MA?

Tide data for Nantucket, MA is sourced from NOAA Station #8449130. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8449130.

What is the moon phase in Nantucket, MA tonight?

Tonight the moon over Nantucket, MA is First Quarter (55% illuminated). This places Nantucket, MA 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