Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Friday, August 21, 2026
The tide is currently falling in Onset Beach, MA.
Next low tide : in 1h 38m at 9:25 am (1.0 ft)
Next high tide : 4:11 pm (3.2 ft)
Sunset today : 7:33 pm
Sunrise tomorrow : 5:57 am
Moon phase : First Quarter (65% illuminated)
Tide Station Location : Station #8447277
Common Questions About Tides

Onset Beach, MA Tides - Oct 1924

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Wed9:534.810:164.23:39-0.34:19-0.25:395:25Waxing Crescent1Wed
2Thu10:444.711:104.04:21-0.25:060.05:405:23Waxing Crescent2Thu
3Fri11:394.55:06-0.15:580.25:415:21Waxing Crescent3Fri
4Sat12:083.912:394.45:560.27:040.55:425:20First Quarter4Sat
5Sun1:083.81:404.26:560.49:130.65:435:18First Quarter5Sun
6Mon2:103.72:424.18:190.610:340.65:445:16First Quarter6Mon
7Tue3:143.73:484.110:200.611:290.45:455:15Waxing Gibbous7Tue
8Wed4:193.94:534.111:310.55:465:13Waxing Gibbous8Wed
9Thu5:214.15:504.212:120.312:210.35:485:11Waxing Gibbous9Thu
10Fri6:154.36:404.312:460.31:020.25:495:10Waxing Gibbous10Fri
11Sat7:034.57:254.31:120.21:390.25:505:08Full Moon11Sat
12Sun7:474.68:084.21:380.12:150.15:515:06Full Moon12Sun
13Mon8:294.58:494.12:090.12:520.15:525:05Full Moon13Mon
14Tue9:094.49:303.92:440.13:290.25:535:03Full Moon14Tue
15Wed9:484.210:103.63:210.14:070.25:545:02Waning Gibbous15Wed
16Thu10:283.910:533.43:590.24:450.45:555:00Waning Gibbous16Thu
17Fri11:083.611:373.24:380.35:240.65:574:58Waning Gibbous17Fri
18Sat11:513.45:190.56:070.85:584:57Waning Gibbous18Sat
19Sun12:243.012:363.26:030.77:010.95:594:55Third Quarter19Sun
20Mon1:112.91:233.16:560.98:201.06:004:54Third Quarter20Mon
21Tue2:002.92:123.18:030.99:440.96:014:52Third Quarter21Tue
22Wed2:513.03:063.19:200.910:360.76:024:51Third Quarter22Wed
23Thu3:473.14:043.310:280.711:160.56:044:49Waning Crescent23Thu
24Fri4:433.55:023.511:230.411:520.26:054:48Waning Crescent24Fri
25Sat5:353.85:533.812:100.16:064:47Waning Crescent25Sat
26Sun6:224.26:424.012:27-0.112:55-0.16:074:45New Moon26Sun
27Mon7:094.67:294.31:05-0.31:41-0.36:084:44New Moon27Mon
28Tue7:554.98:184.41:46-0.52:29-0.46:104:42New Moon28Tue
29Wed8:435.09:074.42:29-0.53:18-0.56:114:41New Moon29Wed
30Thu9:335.09:594.33:15-0.54:07-0.46:124:40Waxing Crescent30Thu
31Fri10:264.910:554.14:02-0.44:57-0.26:134:39Waxing Crescent31Fri
DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
Tidal Data Source: (8447277)

Common Questions About Onset Beach, MA Tides

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

Slack tide in Onset Beach, MA is approximately 12:48 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 Onset Beach, MA?

Onset Beach, MA is currently in a transitional phase. Tonight's moon is 65% 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 Onset Beach, 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 Onset Beach, MA?

Tide predictions for Onset Beach, 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 Onset Beach, MA?

Tide data for Onset Beach, MA is sourced from NOAA Station #8447277. View the official NOAA station page at https://tidesandcurrents.noaa.gov/stationhome.html?id=8447277.

What is the moon phase in Onset Beach, MA tonight?

Tonight the moon over Onset Beach, MA is First Quarter (65% illuminated). This places Onset Beach, MA 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