Tides Today & Tomorrow in Onset Beach, MA

TIDE TIMES for Friday, August 21, 2026
The tide is currently rising in Onset Beach, MA.
Next low tide : 11:33 pm (1.1 ft)
Next high tide : in 3h 44m at 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 - Mar 1924

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat4:423.85:103.412:140.16:175:32Waning Crescent1Sat
2Sun5:453.96:093.71:000.06:155:33Waning Crescent2Sun
3Mon6:404.17:013.912:45-0.11:39-0.16:145:35Waning Crescent3Mon
4Tue7:284.27:484.11:30-0.32:12-0.26:125:36New Moon4Tue
5Wed8:124.28:324.12:13-0.32:41-0.36:115:37New Moon5Wed
6Thu8:554.19:144.12:53-0.43:11-0.36:095:38New Moon6Thu
7Fri9:363.99:563.93:32-0.33:42-0.36:075:39Waxing Crescent7Fri
8Sat10:163.610:363.74:09-0.34:15-0.26:065:40Waxing Crescent8Sat
9Sun10:573.311:163.44:46-0.14:50-0.16:045:42Waxing Crescent9Sun
10Mon11:393.111:583.25:240.15:270.06:025:43Waxing Crescent10Mon
11Tue12:222.86:050.36:070.26:015:44First Quarter11Tue
12Wed12:403.01:072.66:540.56:540.45:595:45First Quarter12Wed
13Thu1:232.81:542.57:590.77:530.55:575:46First Quarter13Thu
14Fri2:112.72:462.59:290.79:020.55:565:47First Quarter14Fri
15Sat3:072.73:452.610:440.610:140.45:545:48First Quarter15Sat
16Sun4:112.84:462.811:350.411:150.25:525:50Waxing Gibbous16Sun
17Mon5:123.15:413.112:150.25:515:51Waxing Gibbous17Mon
18Tue6:033.46:283.512:06-0.112:52-0.15:495:52Waxing Gibbous18Tue
19Wed6:493.77:133.912:53-0.31:29-0.35:475:53Full Moon19Wed
20Thu7:344.07:584.21:39-0.52:06-0.55:455:54Full Moon20Thu
21Fri8:194.28:444.52:26-0.72:45-0.75:445:55Full Moon21Fri
22Sat9:064.29:314.63:13-0.83:26-0.75:425:56Full Moon22Sat
23Sun9:544.210:204.63:59-0.74:07-0.75:405:57Waning Gibbous23Sun
24Mon10:464.011:134.44:45-0.64:49-0.55:395:58Waning Gibbous24Mon
25Tue11:413.85:34-0.35:35-0.35:376:00Waning Gibbous25Tue
26Wed12:104.212:393.66:290.06:270.05:356:01Third Quarter26Wed
27Thu1:104.01:393.57:490.37:330.35:336:02Third Quarter27Thu
28Fri2:113.82:423.49:570.49:160.45:326:03Third Quarter28Fri
29Sat3:173.73:483.411:070.311:070.45:306:04Waning Crescent29Sat
30Sun4:253.74:543.611:590.25:286:05Waning Crescent30Sun
31Mon5:273.75:523.812:050.212:400.25:276:06Waning Crescent31Mon
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 7:52 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