Tides Today & Tomorrow in Nantucket, MA

TIDE TIMES for Thursday, August 20, 2026
The tide is currently falling in Nantucket, MA.
Next low tide : in 2h 30m at 12:22 pm (0.9 ft)
Next high tide : 7:03 pm (3.5 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 - Jul 1940

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Mon9:482.610:013.53:280.53:210.75:108:17Waning Crescent1Mon
2Tue10:372.610:473.64:150.44:060.75:118:17Waning Crescent2Tue
3Wed11:262.611:323.74:590.24:500.65:118:17Waning Crescent3Wed
4Thu12:152.75:430.15:350.55:128:16New Moon4Thu
5Fri12:193.81:032.86:260.06:210.45:138:16New Moon5Fri
6Sat1:073.91:493.07:11-0.17:100.35:138:16New Moon6Sat
7Sun1:554.02:363.17:56-0.28:000.25:148:15Waxing Crescent7Sun
8Mon2:433.93:243.38:43-0.38:540.15:148:15Waxing Crescent8Mon
9Tue3:343.94:153.59:32-0.39:510.15:158:15Waxing Crescent9Tue
10Wed4:293.85:083.610:23-0.310:500.15:168:14First Quarter10Wed
11Thu5:273.66:033.811:16-0.211:510.05:178:14First Quarter11Thu
12Fri6:273.46:593.912:10-0.15:178:13First Quarter12Fri
13Sat7:293.37:574.012:520.01:050.05:188:13First Quarter13Sat
14Sun8:333.18:564.01:540.02:020.15:198:12Waxing Gibbous14Sun
15Mon9:363.19:534.02:580.03:010.25:208:12Waxing Gibbous15Mon
16Tue10:363.010:484.03:580.03:570.35:208:11Waxing Gibbous16Tue
17Wed11:333.011:414.04:530.04:500.35:218:10Full Moon17Wed
18Thu12:283.05:440.05:410.45:228:10Full Moon18Thu
19Fri12:313.91:173.06:310.06:300.45:238:09Full Moon19Fri
20Sat1:193.82:003.17:150.07:170.45:248:08Full Moon20Sat
21Sun2:023.72:403.17:580.18:040.55:258:08Waning Gibbous21Sun
22Mon2:433.63:193.18:390.28:500.55:268:07Waning Gibbous22Mon
23Tue3:243.43:593.29:210.39:380.65:268:06Waning Gibbous23Tue
24Wed4:073.34:413.210:040.410:280.65:278:05Waning Gibbous24Wed
25Thu4:533.15:253.210:480.511:180.65:288:04Third Quarter25Thu
26Fri5:403.06:103.311:320.65:298:03Third Quarter26Fri
27Sat6:302.86:563.312:090.612:160.75:308:02Third Quarter27Sat
28Sun7:212.77:443.412:590.61:020.75:318:01Third Quarter28Sun
29Mon8:152.78:343.51:510.61:490.85:328:00Waning Crescent29Mon
30Tue9:082.79:233.62:450.52:390.85:337:59Waning Crescent30Tue
31Wed10:002.710:123.73:360.43:300.75:347:58Waning Crescent31Wed
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 3:42 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 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