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 4h 46m 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 - Nov 1924

DateHigh TideLow TideSunMoonDate
AMftPMftAMftPMftRiseSet
1Sat11:234.611:534.04:51-0.25:500.16:144:37Waxing Crescent1Sat
2Sun12:224.45:430.17:000.46:164:36First Quarter2Sun
3Mon12:543.81:244.26:460.49:010.56:174:35First Quarter3Mon
4Tue1:553.82:254.08:350.710:140.56:184:34First Quarter4Tue
5Wed2:573.83:283.810:320.611:070.46:194:32First Quarter5Wed
6Thu4:013.94:303.811:320.511:470.36:204:31Waxing Gibbous6Thu
7Fri5:024.05:283.812:180.46:224:30Waxing Gibbous7Fri
8Sat5:554.26:183.812:150.312:550.36:234:29Waxing Gibbous8Sat
9Sun6:424.37:023.912:360.21:260.26:244:28Full Moon9Sun
10Mon7:254.37:443.81:030.11:570.26:254:27Full Moon10Mon
11Tue8:054.38:243.81:350.12:310.16:274:26Full Moon11Tue
12Wed8:424.29:033.62:120.03:070.16:284:25Full Moon12Wed
13Thu9:194.09:423.52:510.03:450.16:294:24Waning Gibbous13Thu
14Fri9:553.810:223.33:320.14:230.26:304:23Waning Gibbous14Fri
15Sat10:323.511:033.14:120.25:000.46:314:22Waning Gibbous15Sat
16Sun11:113.311:482.94:520.45:390.56:334:21Waning Gibbous16Sun
17Mon11:553.25:340.56:220.76:344:21Third Quarter17Mon
18Tue12:352.912:423.16:210.77:140.76:354:20Third Quarter18Tue
19Wed1:232.91:313.07:190.88:210.76:364:19Third Quarter19Wed
20Thu2:123.02:233.18:320.89:250.66:384:18Third Quarter20Thu
21Fri3:053.23:203.29:470.610:180.36:394:18Waning Crescent21Fri
22Sat4:023.54:213.310:510.311:040.16:404:17Waning Crescent22Sat
23Sun4:593.95:213.611:440.011:48-0.26:414:16Waning Crescent23Sun
24Mon5:534.36:163.912:34-0.26:424:16Waning Crescent24Mon
25Tue6:444.77:074.112:32-0.51:23-0.46:434:15New Moon25Tue
26Wed7:345.07:594.21:18-0.62:14-0.66:444:15New Moon26Wed
27Thu8:255.18:504.32:06-0.73:06-0.66:464:14New Moon27Thu
28Fri9:165.19:434.32:57-0.73:58-0.56:474:14Waxing Crescent28Fri
29Sat10:104.910:384.23:48-0.64:49-0.46:484:13Waxing Crescent29Sat
30Sun11:064.611:364.04:40-0.35:41-0.16:494:13Waxing Crescent30Sun
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